TBD Meeting (5166-20)

Fractional flow reserve derived noninvasively from coronary CT angiography is a safe and accurate method for assessing the significance of coronary artery disease in patients with severe aortic stenosis who are headed for transcatheter aortic valve replacement (TAVR), according to results of the CAST-FFR prospective study.

Indeed, utilization of coronary CT angiography–derived fractional flow reserve (CT-FFR) for this purpose offers the advantage of using a single noninvasive imaging method to replace two invasive procedures: coronary angiography to assess the anatomy of coronary lesions, and conventional FFR using a pressure wire to determine the functional significance of a given coronary stenosis as a cause of ischemia, Michael Michail, MBBS, explained in reporting the results at the virtual annual meeting of the European Association of Percutaneous Cardiovascular Interventions.

“Because up to 50% of patients with severe aortic stenosis undergoing TAVR have coexisting coronary artery disease, it remains common practice to perform prior invasive coronary angiography. However, this is associated with inherent risks, particularly in an elderly cohort with comorbidities. Additionally, coronary angiography provides no information on the functional impact of coronary stenoses, which may be important in guiding revascularization decisions prior to TAVR,” noted Dr. Michail, a cardiologist at Monash University, Melbourne.
 

Simulating FFR: ‘A one-stop shop cardiac CT’

Dr. Michail presented the results of the prospective CAST-FFR study, the first evaluation of CT-FFR for assessment of coronary arteries in patients with severe symptomatic aortic stenosis. This method uses computational fluid dynamics to transform data obtained noninvasively from a standard coronary CT angiography acquisition into a simulated FFR. And it offers the potential to streamline patient care.

“In current practice we see elderly patients with a long pre-TAVR assessment period, with numerous appointments and invasive procedures. Our vision is a one-stop shop cardiac CT that will provide the cardiologist with a complete assessment of the annular measurements, peripheral vasculature, and the coronary arteries ahead of their procedure,” according to Dr. Michail.

“We believe the ability to perform the requisite coronary assessment using CT-FFR will translate to improved patient care in several ways,” he continued. “Firstly, this will shorten the number of tests and overall diagnostic journey for patients. It will reduce the risk from unnecessary invasive procedures, and this will also reduce discomfort for the patient. Based on emerging evidence on the adverse prognostic impact of functionally significant coronary disease in aortic stenosis, this data has the potential to improve procedural risk stratification. And finally, contingent on further data, this may improve lesion selection for upfront revascularization.”

The CAST-FFR study was a small, single-center, proof-of-concept study in which 42 patients with severe aortic stenosis underwent both coronary CT angiography and conventional FFR with a pressure wire. The CT data was sent to a core laboratory for conversion into CT-FFR by evaluators blinded to the conventional FFR values.

Of the 42 participants, 39 (93%) had usable CT-FFR data on 60 coronary vessels. Dr. Michail and coinvestigators found a strong correlation between the conventional pressure wire FFR and CT-FFR findings, with a receiver operating characteristic area under the curve of 0.83 per vessel. CT-FFR had a diagnostic sensitivity and specificity of 73.9% and 78.4%, respectively, with a positive predictive value of 68%, a negative predictive value of 82.9%, and a diagnostic accuracy of 76.7%.

He cited as study limitations the small size, the fact that patients with previous revascularization or significant left ventricular impairment were excluded, and the study cohort’s relative youth.

“With a mean age of 76.2 years, it’s unclear whether these results can be extrapolated to very elderly patients with more calcified arteries undergoing TAVR. Encouragingly, though, a subgroup analysis based on calcium score showed no effect on accuracy,” according to the cardiologist.

CT-FFR may ‘shorten the diagnostic journey’ for fragile patients

Discussant Daniele Andreini, MD, PhD, praised the investigators’ concept of integrating the functional assessment provided by CT-FFR into a one-stop shop examination by cardiac CT angiography for TAVR planning.

“I would like to underline one of Dr. Michail’s messages: It’s really important to shorten the diagnostic journey for these fragile, older patients with aortic stenosis in order to improve safety, use less contrast, and avoid complications,” said Dr. Andreini, a cardiologist at the University of Milan and director of the cardiovascular CT and radiology unit at Monzino Cardiology Center, also in Milan.

Both Dr. Michail and Dr. Andreini reported having no financial conflicts of interest.

[email protected]

Fractional flow reserve derived noninvasively from coronary CT angiography is a safe and accurate method for assessing the significance of coronary artery disease in patients with severe aortic stenosis who are headed for transcatheter aortic valve replacement (TAVR), according to results of the CAST-FFR prospective study.

Indeed, utilization of coronary CT angiography–derived fractional flow reserve (CT-FFR) for this purpose offers the advantage of using a single noninvasive imaging method to replace two invasive procedures: coronary angiography to assess the anatomy of coronary lesions, and conventional FFR using a pressure wire to determine the functional significance of a given coronary stenosis as a cause of ischemia, Michael Michail, MBBS, explained in reporting the results at the virtual annual meeting of the European Association of Percutaneous Cardiovascular Interventions.

“Because up to 50% of patients with severe aortic stenosis undergoing TAVR have coexisting coronary artery disease, it remains common practice to perform prior invasive coronary angiography. However, this is associated with inherent risks, particularly in an elderly cohort with comorbidities. Additionally, coronary angiography provides no information on the functional impact of coronary stenoses, which may be important in guiding revascularization decisions prior to TAVR,” noted Dr. Michail, a cardiologist at Monash University, Melbourne.
 

Simulating FFR: ‘A one-stop shop cardiac CT’

Dr. Michail presented the results of the prospective CAST-FFR study, the first evaluation of CT-FFR for assessment of coronary arteries in patients with severe symptomatic aortic stenosis. This method uses computational fluid dynamics to transform data obtained noninvasively from a standard coronary CT angiography acquisition into a simulated FFR. And it offers the potential to streamline patient care.

“In current practice we see elderly patients with a long pre-TAVR assessment period, with numerous appointments and invasive procedures. Our vision is a one-stop shop cardiac CT that will provide the cardiologist with a complete assessment of the annular measurements, peripheral vasculature, and the coronary arteries ahead of their procedure,” according to Dr. Michail.

“We believe the ability to perform the requisite coronary assessment using CT-FFR will translate to improved patient care in several ways,” he continued. “Firstly, this will shorten the number of tests and overall diagnostic journey for patients. It will reduce the risk from unnecessary invasive procedures, and this will also reduce discomfort for the patient. Based on emerging evidence on the adverse prognostic impact of functionally significant coronary disease in aortic stenosis, this data has the potential to improve procedural risk stratification. And finally, contingent on further data, this may improve lesion selection for upfront revascularization.”

The CAST-FFR study was a small, single-center, proof-of-concept study in which 42 patients with severe aortic stenosis underwent both coronary CT angiography and conventional FFR with a pressure wire. The CT data was sent to a core laboratory for conversion into CT-FFR by evaluators blinded to the conventional FFR values.

Of the 42 participants, 39 (93%) had usable CT-FFR data on 60 coronary vessels. Dr. Michail and coinvestigators found a strong correlation between the conventional pressure wire FFR and CT-FFR findings, with a receiver operating characteristic area under the curve of 0.83 per vessel. CT-FFR had a diagnostic sensitivity and specificity of 73.9% and 78.4%, respectively, with a positive predictive value of 68%, a negative predictive value of 82.9%, and a diagnostic accuracy of 76.7%.

He cited as study limitations the small size, the fact that patients with previous revascularization or significant left ventricular impairment were excluded, and the study cohort’s relative youth.

“With a mean age of 76.2 years, it’s unclear whether these results can be extrapolated to very elderly patients with more calcified arteries undergoing TAVR. Encouragingly, though, a subgroup analysis based on calcium score showed no effect on accuracy,” according to the cardiologist.

CT-FFR may ‘shorten the diagnostic journey’ for fragile patients

Discussant Daniele Andreini, MD, PhD, praised the investigators’ concept of integrating the functional assessment provided by CT-FFR into a one-stop shop examination by cardiac CT angiography for TAVR planning.

“I would like to underline one of Dr. Michail’s messages: It’s really important to shorten the diagnostic journey for these fragile, older patients with aortic stenosis in order to improve safety, use less contrast, and avoid complications,” said Dr. Andreini, a cardiologist at the University of Milan and director of the cardiovascular CT and radiology unit at Monzino Cardiology Center, also in Milan.

Both Dr. Michail and Dr. Andreini reported having no financial conflicts of interest.

[email protected]

Fractional flow reserve derived noninvasively from coronary CT angiography is a safe and accurate method for assessing the significance of coronary artery disease in patients with severe aortic stenosis who are headed for transcatheter aortic valve replacement (TAVR), according to results of the CAST-FFR prospective study.

Indeed, utilization of coronary CT angiography–derived fractional flow reserve (CT-FFR) for this purpose offers the advantage of using a single noninvasive imaging method to replace two invasive procedures: coronary angiography to assess the anatomy of coronary lesions, and conventional FFR using a pressure wire to determine the functional significance of a given coronary stenosis as a cause of ischemia, Michael Michail, MBBS, explained in reporting the results at the virtual annual meeting of the European Association of Percutaneous Cardiovascular Interventions.

“Because up to 50% of patients with severe aortic stenosis undergoing TAVR have coexisting coronary artery disease, it remains common practice to perform prior invasive coronary angiography. However, this is associated with inherent risks, particularly in an elderly cohort with comorbidities. Additionally, coronary angiography provides no information on the functional impact of coronary stenoses, which may be important in guiding revascularization decisions prior to TAVR,” noted Dr. Michail, a cardiologist at Monash University, Melbourne.
 

Simulating FFR: ‘A one-stop shop cardiac CT’

Dr. Michail presented the results of the prospective CAST-FFR study, the first evaluation of CT-FFR for assessment of coronary arteries in patients with severe symptomatic aortic stenosis. This method uses computational fluid dynamics to transform data obtained noninvasively from a standard coronary CT angiography acquisition into a simulated FFR. And it offers the potential to streamline patient care.

“In current practice we see elderly patients with a long pre-TAVR assessment period, with numerous appointments and invasive procedures. Our vision is a one-stop shop cardiac CT that will provide the cardiologist with a complete assessment of the annular measurements, peripheral vasculature, and the coronary arteries ahead of their procedure,” according to Dr. Michail.

“We believe the ability to perform the requisite coronary assessment using CT-FFR will translate to improved patient care in several ways,” he continued. “Firstly, this will shorten the number of tests and overall diagnostic journey for patients. It will reduce the risk from unnecessary invasive procedures, and this will also reduce discomfort for the patient. Based on emerging evidence on the adverse prognostic impact of functionally significant coronary disease in aortic stenosis, this data has the potential to improve procedural risk stratification. And finally, contingent on further data, this may improve lesion selection for upfront revascularization.”

The CAST-FFR study was a small, single-center, proof-of-concept study in which 42 patients with severe aortic stenosis underwent both coronary CT angiography and conventional FFR with a pressure wire. The CT data was sent to a core laboratory for conversion into CT-FFR by evaluators blinded to the conventional FFR values.

Of the 42 participants, 39 (93%) had usable CT-FFR data on 60 coronary vessels. Dr. Michail and coinvestigators found a strong correlation between the conventional pressure wire FFR and CT-FFR findings, with a receiver operating characteristic area under the curve of 0.83 per vessel. CT-FFR had a diagnostic sensitivity and specificity of 73.9% and 78.4%, respectively, with a positive predictive value of 68%, a negative predictive value of 82.9%, and a diagnostic accuracy of 76.7%.

He cited as study limitations the small size, the fact that patients with previous revascularization or significant left ventricular impairment were excluded, and the study cohort’s relative youth.

“With a mean age of 76.2 years, it’s unclear whether these results can be extrapolated to very elderly patients with more calcified arteries undergoing TAVR. Encouragingly, though, a subgroup analysis based on calcium score showed no effect on accuracy,” according to the cardiologist.

CT-FFR may ‘shorten the diagnostic journey’ for fragile patients

Discussant Daniele Andreini, MD, PhD, praised the investigators’ concept of integrating the functional assessment provided by CT-FFR into a one-stop shop examination by cardiac CT angiography for TAVR planning.

“I would like to underline one of Dr. Michail’s messages: It’s really important to shorten the diagnostic journey for these fragile, older patients with aortic stenosis in order to improve safety, use less contrast, and avoid complications,” said Dr. Andreini, a cardiologist at the University of Milan and director of the cardiovascular CT and radiology unit at Monzino Cardiology Center, also in Milan.

Both Dr. Michail and Dr. Andreini reported having no financial conflicts of interest.

[email protected]

Most interventional cardiologists still rely solely upon angiography in making revascularization decisions about intermediate stenoses in the setting of stable coronary artery disease – and in doing so they end up making the wrong call nearly 40% of the time, according to the results of an international survey presented at the virtual annual meeting of the European Association of Percutaneous Cardiovascular Interventions.

“We saw a strong tendency to visually overestimate the percent diameter stenosis,” reported Gabor G. Toth, MD, an interventional cardiologist at the Medical University of Graz (Austria).

The same tendency has been highlighted in numerous randomized trials and observational studies. That’s why both European and U.S. guidelines now strongly recommend invasive functional assessment, such as fractional-flow reserve (FFR) testing, in evaluating the significance of intermediate stenoses in the absence of noninvasive evidence of ischemia. The new survey findings point to an important disconnect between these guideline recommendations and current clinical practice, he noted.

Dr. Toth presented the results of the second web-based, international survey on interventional decision-making strategy sponsored by the European Association of Percutaneous Cardiovascular Interventions. He contrasted the findings with those of the previously reported first international online survey, conducted 6 years earlier, for which he was first author (Circ Cardiovasc Interv. 2014 Dec;7[6]:751-9).

The two surveys were identically designed. In both, participants answered questions that enabled investigators to place them into one of four categories based upon the extent of their experience in interventional cardiology. The participants were also presented with 5 angiograms of focal intermediate stenoses and asked to determine the stenosis significance of each lesion. No information on the functional significance of the stenoses was included; however, the respondents could request additional diagnostic information by “ordering” adjunctive invasive functional assessment tests, including FFR, quantitative coronary angiography, intravascular ultrasound, or optical coherence tomography. Importantly, participating cardiologists were asked to make their decisions based upon best possible clinical practice in a hypothetical scenario where financial constraints had no role.

The second international survey was conducted during the latter half of 2019. The 334 interventional cardiologists who responded performed a total of 978 case evaluations including 2,054 coronary lesion assessments.

About 59% of all decisions were made solely on the basis of angiographic appearance without any information as to the functional significance of a given stenosis: Indeed, 13% of all stenoses were thereby declared to be “certainly” nonsignificant, and 46% were deemed “certainly” significant. In total, that figure was down significantly from the 71% rate in the first survey. In the first survey, 47% of decisions based upon angiographic appearance alone were discordant with FFR results known to the investigators, compared with a 39% discordance rate in the second survey.

Of the physician decisions made in the second survey, 10% involved a request for intravascular imaging, essentially unchanged from the 9% rate in the first survey. However, there was a significant increase over time in requests for invasive functional assessment tests: 25% in the first survey, rising to 31% in the second. This increase was entirely driven by additional requests for data on nonhyperemic pressure ratios; there was no difference in requests for FFR testing between the 2013 and 2019 surveys.

Clinician experience played an interesting role in decision-making: “Experience does not have an impact on the accuracy of angiographically based decisions, but experience does have an impact on understanding the need for adjunctive functional diagnostic testing,” Dr. Toth explained.

Indeed, 21% of decisions made by the least-experienced interventional cardiologists involved a request for adjunctive invasive functional assessment, compared with 24% of decisions by physicians in the third quartile of experience, 32% in the second, and 37% of decisions made by the most experienced clinicians.

Discussant Michael Haude, MD, PhD, said that “these results clearly show that eyeball angioguidance is still the dominant tool used in decision-making, and that this eyeball angioguidance continuously overestimates the stenosis when you compare the results to quantitative coronary angiography.

“These results, surprisingly for me, show a quite low uptake of the invasive functional assessments despite overwhelming scientific data leading to clear guideline-based recommendations. Why is this the case, even after financial constraints are ruled out? Probably because FFR is still a complex invasive procedure. Maybe, in the future, quantitative flow-ratio angiography [which requires no pressure wire] or CT-based FFR will be more popular,” said Dr. Haude, an interventional cardiologist at the Rheinland Clinic in Neuss, Germany.

He reported receiving research grants from Biotronik and serving as a paid consultant to that company as well as Cardiac Dimensions, Orbus Neich, and Philips. Dr. Toth reported having no financial conflicts regarding the international survey.

[email protected]

Most interventional cardiologists still rely solely upon angiography in making revascularization decisions about intermediate stenoses in the setting of stable coronary artery disease – and in doing so they end up making the wrong call nearly 40% of the time, according to the results of an international survey presented at the virtual annual meeting of the European Association of Percutaneous Cardiovascular Interventions.

“We saw a strong tendency to visually overestimate the percent diameter stenosis,” reported Gabor G. Toth, MD, an interventional cardiologist at the Medical University of Graz (Austria).

The same tendency has been highlighted in numerous randomized trials and observational studies. That’s why both European and U.S. guidelines now strongly recommend invasive functional assessment, such as fractional-flow reserve (FFR) testing, in evaluating the significance of intermediate stenoses in the absence of noninvasive evidence of ischemia. The new survey findings point to an important disconnect between these guideline recommendations and current clinical practice, he noted.

Dr. Toth presented the results of the second web-based, international survey on interventional decision-making strategy sponsored by the European Association of Percutaneous Cardiovascular Interventions. He contrasted the findings with those of the previously reported first international online survey, conducted 6 years earlier, for which he was first author (Circ Cardiovasc Interv. 2014 Dec;7[6]:751-9).

The two surveys were identically designed. In both, participants answered questions that enabled investigators to place them into one of four categories based upon the extent of their experience in interventional cardiology. The participants were also presented with 5 angiograms of focal intermediate stenoses and asked to determine the stenosis significance of each lesion. No information on the functional significance of the stenoses was included; however, the respondents could request additional diagnostic information by “ordering” adjunctive invasive functional assessment tests, including FFR, quantitative coronary angiography, intravascular ultrasound, or optical coherence tomography. Importantly, participating cardiologists were asked to make their decisions based upon best possible clinical practice in a hypothetical scenario where financial constraints had no role.

The second international survey was conducted during the latter half of 2019. The 334 interventional cardiologists who responded performed a total of 978 case evaluations including 2,054 coronary lesion assessments.

About 59% of all decisions were made solely on the basis of angiographic appearance without any information as to the functional significance of a given stenosis: Indeed, 13% of all stenoses were thereby declared to be “certainly” nonsignificant, and 46% were deemed “certainly” significant. In total, that figure was down significantly from the 71% rate in the first survey. In the first survey, 47% of decisions based upon angiographic appearance alone were discordant with FFR results known to the investigators, compared with a 39% discordance rate in the second survey.

Of the physician decisions made in the second survey, 10% involved a request for intravascular imaging, essentially unchanged from the 9% rate in the first survey. However, there was a significant increase over time in requests for invasive functional assessment tests: 25% in the first survey, rising to 31% in the second. This increase was entirely driven by additional requests for data on nonhyperemic pressure ratios; there was no difference in requests for FFR testing between the 2013 and 2019 surveys.

Clinician experience played an interesting role in decision-making: “Experience does not have an impact on the accuracy of angiographically based decisions, but experience does have an impact on understanding the need for adjunctive functional diagnostic testing,” Dr. Toth explained.

Indeed, 21% of decisions made by the least-experienced interventional cardiologists involved a request for adjunctive invasive functional assessment, compared with 24% of decisions by physicians in the third quartile of experience, 32% in the second, and 37% of decisions made by the most experienced clinicians.

Discussant Michael Haude, MD, PhD, said that “these results clearly show that eyeball angioguidance is still the dominant tool used in decision-making, and that this eyeball angioguidance continuously overestimates the stenosis when you compare the results to quantitative coronary angiography.

“These results, surprisingly for me, show a quite low uptake of the invasive functional assessments despite overwhelming scientific data leading to clear guideline-based recommendations. Why is this the case, even after financial constraints are ruled out? Probably because FFR is still a complex invasive procedure. Maybe, in the future, quantitative flow-ratio angiography [which requires no pressure wire] or CT-based FFR will be more popular,” said Dr. Haude, an interventional cardiologist at the Rheinland Clinic in Neuss, Germany.

He reported receiving research grants from Biotronik and serving as a paid consultant to that company as well as Cardiac Dimensions, Orbus Neich, and Philips. Dr. Toth reported having no financial conflicts regarding the international survey.

[email protected]

Most interventional cardiologists still rely solely upon angiography in making revascularization decisions about intermediate stenoses in the setting of stable coronary artery disease – and in doing so they end up making the wrong call nearly 40% of the time, according to the results of an international survey presented at the virtual annual meeting of the European Association of Percutaneous Cardiovascular Interventions.

“We saw a strong tendency to visually overestimate the percent diameter stenosis,” reported Gabor G. Toth, MD, an interventional cardiologist at the Medical University of Graz (Austria).

The same tendency has been highlighted in numerous randomized trials and observational studies. That’s why both European and U.S. guidelines now strongly recommend invasive functional assessment, such as fractional-flow reserve (FFR) testing, in evaluating the significance of intermediate stenoses in the absence of noninvasive evidence of ischemia. The new survey findings point to an important disconnect between these guideline recommendations and current clinical practice, he noted.

Dr. Toth presented the results of the second web-based, international survey on interventional decision-making strategy sponsored by the European Association of Percutaneous Cardiovascular Interventions. He contrasted the findings with those of the previously reported first international online survey, conducted 6 years earlier, for which he was first author (Circ Cardiovasc Interv. 2014 Dec;7[6]:751-9).

The two surveys were identically designed. In both, participants answered questions that enabled investigators to place them into one of four categories based upon the extent of their experience in interventional cardiology. The participants were also presented with 5 angiograms of focal intermediate stenoses and asked to determine the stenosis significance of each lesion. No information on the functional significance of the stenoses was included; however, the respondents could request additional diagnostic information by “ordering” adjunctive invasive functional assessment tests, including FFR, quantitative coronary angiography, intravascular ultrasound, or optical coherence tomography. Importantly, participating cardiologists were asked to make their decisions based upon best possible clinical practice in a hypothetical scenario where financial constraints had no role.

The second international survey was conducted during the latter half of 2019. The 334 interventional cardiologists who responded performed a total of 978 case evaluations including 2,054 coronary lesion assessments.

About 59% of all decisions were made solely on the basis of angiographic appearance without any information as to the functional significance of a given stenosis: Indeed, 13% of all stenoses were thereby declared to be “certainly” nonsignificant, and 46% were deemed “certainly” significant. In total, that figure was down significantly from the 71% rate in the first survey. In the first survey, 47% of decisions based upon angiographic appearance alone were discordant with FFR results known to the investigators, compared with a 39% discordance rate in the second survey.

Of the physician decisions made in the second survey, 10% involved a request for intravascular imaging, essentially unchanged from the 9% rate in the first survey. However, there was a significant increase over time in requests for invasive functional assessment tests: 25% in the first survey, rising to 31% in the second. This increase was entirely driven by additional requests for data on nonhyperemic pressure ratios; there was no difference in requests for FFR testing between the 2013 and 2019 surveys.

Clinician experience played an interesting role in decision-making: “Experience does not have an impact on the accuracy of angiographically based decisions, but experience does have an impact on understanding the need for adjunctive functional diagnostic testing,” Dr. Toth explained.

Indeed, 21% of decisions made by the least-experienced interventional cardiologists involved a request for adjunctive invasive functional assessment, compared with 24% of decisions by physicians in the third quartile of experience, 32% in the second, and 37% of decisions made by the most experienced clinicians.

Discussant Michael Haude, MD, PhD, said that “these results clearly show that eyeball angioguidance is still the dominant tool used in decision-making, and that this eyeball angioguidance continuously overestimates the stenosis when you compare the results to quantitative coronary angiography.

“These results, surprisingly for me, show a quite low uptake of the invasive functional assessments despite overwhelming scientific data leading to clear guideline-based recommendations. Why is this the case, even after financial constraints are ruled out? Probably because FFR is still a complex invasive procedure. Maybe, in the future, quantitative flow-ratio angiography [which requires no pressure wire] or CT-based FFR will be more popular,” said Dr. Haude, an interventional cardiologist at the Rheinland Clinic in Neuss, Germany.

He reported receiving research grants from Biotronik and serving as a paid consultant to that company as well as Cardiac Dimensions, Orbus Neich, and Philips. Dr. Toth reported having no financial conflicts regarding the international survey.

[email protected]

Two-year outcomes following transcatheter mitral valve replacement with the Tendyne prosthesis showed durable control of mitral regurgitation, sustained improvement in quality of life and functional capacity, and a marked drop-off in the rate of hospitalization for heart failure, David W.M. Muller, MBBS, MD, reported at the virtual annual meeting of the European Association of Percutaneous Cardiovascular Interventions.

“The outcomes can be considered very acceptable considering the advanced age and underlying comorbidities. The data show that, at 2 years, we still have excellent control of the MR [mitral regurgitation], with more than 93% of patients having no MR at all, and there were no patients with 1+ or greater MR,” said Dr. Muller, director of cardiac catheterization laboratories at St. Vincent’s Hospital in Sydney.

He presented for the first time the 2-year results for the first 100 patients enrolled in the long-term Tendyne Expanded Clinical Study. The 1-year outcomes were reported previously (J Am Coll Cardiol. 2019 Mar 26;73[11]:1250-60).

The transcatheter Tendyne mitral valve system received European marketing approval in early 2020 for commercial use in patients with severe symptomatic MR who aren’t candidates for open surgery or transcatheter mitral repair using the MitraClip device. The Tendyne remains investigational in the United States, where a large phase 3 randomized head-to-head trial of the Tendyne device and the FDA-approved MitraClip is ongoing.

At enrollment, the first 100 patients in the long-term prospective Tendyne study averaged 75 years of age, 66% were New York Heart Association functional class III or IV, 89% had secondary or mixed etiology MR, and 39% had been hospitalized for heart failure during the preceding 6 months. Ninety-two percent of participants had 4+ MR before implantation. The group’s average Society of Thoracic Surgeons Predicted Risk of Mortality score was 7.8%.

The all-cause mortality rate was 27% at 1 year and 39% at 2 years, with 87% of deaths being attributable to cardiovascular causes. At 2 years, 82% of survivors were NYHA class I or II. Their Kansas City Cardiomyopathy Questionnaire score improved by 19.1 points from an average of 49 at baseline. There was no evidence of structural valve dysfunction. Their heart failure hospitalization rate improved from 1.3 events per patient per year to 0.6 per patient-year at 1 year and 0.51 at 2 years.

Discussant Francesco Maisano, MD, was favorably impressed by the acute outcomes of transcatheter mitral valve replacement with the Tendyne device.

“There were very few procedural or in-hospital complications. Success was obtained in almost every patient. There was no procedural mortality. The 30-day mortality of 6.0% was reasonable in patients with a baseline STS score of 7.8%; that’s pretty good, I would say,” observed Dr. Maisano, professor of cardiac surgery at the University of Zürich and a pioneer of catheter-based mitral and tricuspid interventions.

However, he voiced concerns about the 35% incidence of major bleeding and 5% rate of disabling stroke at 2 years, which he deemed “pretty high.”

“This underlies the open issue of anticoagulation following these kinds of procedures. This obviously requires further work in the next years,” he said.

Dr. Muller reported receiving research grants from and serving as a consultant to Abbott, which markets the MitraClip and is developing the Tendyne system. He also serves as a consultant to Edwards Lifesciences and Medtronic. Dr. Maisano also reported serving as a consultant to several medical device companies.

[email protected]

Two-year outcomes following transcatheter mitral valve replacement with the Tendyne prosthesis showed durable control of mitral regurgitation, sustained improvement in quality of life and functional capacity, and a marked drop-off in the rate of hospitalization for heart failure, David W.M. Muller, MBBS, MD, reported at the virtual annual meeting of the European Association of Percutaneous Cardiovascular Interventions.

“The outcomes can be considered very acceptable considering the advanced age and underlying comorbidities. The data show that, at 2 years, we still have excellent control of the MR [mitral regurgitation], with more than 93% of patients having no MR at all, and there were no patients with 1+ or greater MR,” said Dr. Muller, director of cardiac catheterization laboratories at St. Vincent’s Hospital in Sydney.

He presented for the first time the 2-year results for the first 100 patients enrolled in the long-term Tendyne Expanded Clinical Study. The 1-year outcomes were reported previously (J Am Coll Cardiol. 2019 Mar 26;73[11]:1250-60).

The transcatheter Tendyne mitral valve system received European marketing approval in early 2020 for commercial use in patients with severe symptomatic MR who aren’t candidates for open surgery or transcatheter mitral repair using the MitraClip device. The Tendyne remains investigational in the United States, where a large phase 3 randomized head-to-head trial of the Tendyne device and the FDA-approved MitraClip is ongoing.

At enrollment, the first 100 patients in the long-term prospective Tendyne study averaged 75 years of age, 66% were New York Heart Association functional class III or IV, 89% had secondary or mixed etiology MR, and 39% had been hospitalized for heart failure during the preceding 6 months. Ninety-two percent of participants had 4+ MR before implantation. The group’s average Society of Thoracic Surgeons Predicted Risk of Mortality score was 7.8%.

The all-cause mortality rate was 27% at 1 year and 39% at 2 years, with 87% of deaths being attributable to cardiovascular causes. At 2 years, 82% of survivors were NYHA class I or II. Their Kansas City Cardiomyopathy Questionnaire score improved by 19.1 points from an average of 49 at baseline. There was no evidence of structural valve dysfunction. Their heart failure hospitalization rate improved from 1.3 events per patient per year to 0.6 per patient-year at 1 year and 0.51 at 2 years.

Discussant Francesco Maisano, MD, was favorably impressed by the acute outcomes of transcatheter mitral valve replacement with the Tendyne device.

“There were very few procedural or in-hospital complications. Success was obtained in almost every patient. There was no procedural mortality. The 30-day mortality of 6.0% was reasonable in patients with a baseline STS score of 7.8%; that’s pretty good, I would say,” observed Dr. Maisano, professor of cardiac surgery at the University of Zürich and a pioneer of catheter-based mitral and tricuspid interventions.

However, he voiced concerns about the 35% incidence of major bleeding and 5% rate of disabling stroke at 2 years, which he deemed “pretty high.”

“This underlies the open issue of anticoagulation following these kinds of procedures. This obviously requires further work in the next years,” he said.

Dr. Muller reported receiving research grants from and serving as a consultant to Abbott, which markets the MitraClip and is developing the Tendyne system. He also serves as a consultant to Edwards Lifesciences and Medtronic. Dr. Maisano also reported serving as a consultant to several medical device companies.

[email protected]

Two-year outcomes following transcatheter mitral valve replacement with the Tendyne prosthesis showed durable control of mitral regurgitation, sustained improvement in quality of life and functional capacity, and a marked drop-off in the rate of hospitalization for heart failure, David W.M. Muller, MBBS, MD, reported at the virtual annual meeting of the European Association of Percutaneous Cardiovascular Interventions.

“The outcomes can be considered very acceptable considering the advanced age and underlying comorbidities. The data show that, at 2 years, we still have excellent control of the MR [mitral regurgitation], with more than 93% of patients having no MR at all, and there were no patients with 1+ or greater MR,” said Dr. Muller, director of cardiac catheterization laboratories at St. Vincent’s Hospital in Sydney.

He presented for the first time the 2-year results for the first 100 patients enrolled in the long-term Tendyne Expanded Clinical Study. The 1-year outcomes were reported previously (J Am Coll Cardiol. 2019 Mar 26;73[11]:1250-60).

The transcatheter Tendyne mitral valve system received European marketing approval in early 2020 for commercial use in patients with severe symptomatic MR who aren’t candidates for open surgery or transcatheter mitral repair using the MitraClip device. The Tendyne remains investigational in the United States, where a large phase 3 randomized head-to-head trial of the Tendyne device and the FDA-approved MitraClip is ongoing.

At enrollment, the first 100 patients in the long-term prospective Tendyne study averaged 75 years of age, 66% were New York Heart Association functional class III or IV, 89% had secondary or mixed etiology MR, and 39% had been hospitalized for heart failure during the preceding 6 months. Ninety-two percent of participants had 4+ MR before implantation. The group’s average Society of Thoracic Surgeons Predicted Risk of Mortality score was 7.8%.

The all-cause mortality rate was 27% at 1 year and 39% at 2 years, with 87% of deaths being attributable to cardiovascular causes. At 2 years, 82% of survivors were NYHA class I or II. Their Kansas City Cardiomyopathy Questionnaire score improved by 19.1 points from an average of 49 at baseline. There was no evidence of structural valve dysfunction. Their heart failure hospitalization rate improved from 1.3 events per patient per year to 0.6 per patient-year at 1 year and 0.51 at 2 years.

Discussant Francesco Maisano, MD, was favorably impressed by the acute outcomes of transcatheter mitral valve replacement with the Tendyne device.

“There were very few procedural or in-hospital complications. Success was obtained in almost every patient. There was no procedural mortality. The 30-day mortality of 6.0% was reasonable in patients with a baseline STS score of 7.8%; that’s pretty good, I would say,” observed Dr. Maisano, professor of cardiac surgery at the University of Zürich and a pioneer of catheter-based mitral and tricuspid interventions.

However, he voiced concerns about the 35% incidence of major bleeding and 5% rate of disabling stroke at 2 years, which he deemed “pretty high.”

“This underlies the open issue of anticoagulation following these kinds of procedures. This obviously requires further work in the next years,” he said.

Dr. Muller reported receiving research grants from and serving as a consultant to Abbott, which markets the MitraClip and is developing the Tendyne system. He also serves as a consultant to Edwards Lifesciences and Medtronic. Dr. Maisano also reported serving as a consultant to several medical device companies.

[email protected]

The DynamX Bioadaptor – arguably the most original concept in coronary stent design to come along in 3 decades – demonstrated excellent safety and efficacy in a 12-month international, proof-of-concept study, Stefan Verheye, MD, said at the virtual annual meeting of the European Association of Percutaneous Cardiovascular Interventions.

“There has been no fundamental change in stent design in over 30 years,” declared Dr. Verheye, codirector of the Antwerp (Belgium) Cardiovascular Center. “The DynamX Bioadaptor is a fundamental innovation in device design.”

The investigational device is a 71-mcm-thick, cobalt-chromium metal platform that elutes novolimus from a biodegradable polymer. Circumferential rings in low-stress sections of the device are held together by polymer connectors, and when the polymer erodes at about 6 months the stent segments are able to disengage from each other while maintaining longitudinal continuity. Dr. Verheye called this process “uncaging” the stented artery. The result is restoration of normal vessel angulation and compliance; the artery is no longer artificially straightened and constrained by a relatively stiff stent. Positive adaptive remodeling is preserved with enhanced vessel pulsatility and maintenance of lumenal area for good blood flow.

Dr. Verheye said the impetus for developing this outside-the-box novel stent platform lies in the recognition of a major unmet need for better drug-eluting stent (DES) performance. “Despite excellent acute outcomes, data with current-generation DES show long-term event rates are high and accrue at a rate of 2%-3% per year without a plateau.”

He was coprincipal investigator for the international study, which included 50 patients who received a DynamX Bioadaptor for a single de novo coronary artery lesion no more than 24 mm in length. The acute performance of the device was similar to that of second-generation DES, with a mean acute gain post procedure of 1.63 mm by quantitative coronary angiography and a mean late lumen loss of 0.12 mm when measured again at 9 or 12 months.

Intravascular ultrasound imaging showed a 3% increase in mean target vessel area and a 5% increase in the stented area from post procedure to 9 or 12 months’ follow-up, with no change in mean lumen area, all of which translates into maintenance of good blood flow over time. In contrast, what typically occurs following implantation of current DES is maintenance of target vessel and device areas, but with a loss in mean lumen area, the cardiologist noted.

There were two cardiac deaths but no cases of target lesion revascularization, device thrombosis, or strut fracture within 12 months of the procedure.

“The Bioadaptor performs similarly to second-generation DES in terms of implantation technique, deliverability, conformability, and radial strength during the healing phase, while showing the promise of mitigating the 2%-3% annualized event rate beyond 1 year,” Dr. Verheye concluded, adding, “Obviously, longer-term follow-up in comparative studies will be needed to show a reduction in the device-oriented events that have been observed with current DES.”

Session cochair Davide Capodanno, MD, PhD, of the University of Catania (Italy), declared: “This is an intriguing device because it’s metal, but it’s a kind of pulsatile metal after the biodegradation of the connectors. It’s something I’ve never seen.”

Discussant William Wijns, MD, PhD, said he was “thrilled” by the innovative aspect of the DynamX Bioadaptor, but he’s a long way from being persuaded that the device’s potential physiological advantages will translate into improved clinical outcomes relative to current DES.

“Don’t we all have a strange feeling of deja vu because all these anticipated benefits are the same as those we were told we would see with fully bioresorbable scaffolds? And we know so much after 10 years of experience with bioresorbable scaffolds that probably we will not accept this great story unless we get more and more evidence,” cautioned Dr. Wijns, professor of interventional cardiology at the National University of Ireland, Galway, and chairman of EuroPCR.

The claim regarding bioresorbable scaffolds was that, even though the acute results weren’t as good as with DES, that disadvantage would be outweighed by superior long-term clinical outcomes. But in fact the long-term outcomes turned out to be worse as well.

“We had to give up immediate results with the bioresorbable scaffolds. I don’t think we want to go that route again this time,” the cardiologist said.

Thus, the first thing that’s needed in order to make a convincing case for the Bioadaptor is evidence from a large, randomized, comparative trial demonstrating that the acute performance of the novel device is noninferior to that of current DES, including data on complex lesions. Such a study was supposed to be underway now but has been delayed by the COVID-19 pandemic, he noted.

Once there is evidence that the acute results with the Bioadaptor are truly comparable with those achieved with current DES, there will be a need for long-term data showing that the device reduces the 2%-3% annualized event rate seen with DES beyond 1 year, Dr. Wijns added.

Dr. Verheye reported receiving consultation fees from study sponsor Elixir Medical as well as from Biotronik. Dr. Wijns reported receiving research grants from MicroPort.

[email protected]

The DynamX Bioadaptor – arguably the most original concept in coronary stent design to come along in 3 decades – demonstrated excellent safety and efficacy in a 12-month international, proof-of-concept study, Stefan Verheye, MD, said at the virtual annual meeting of the European Association of Percutaneous Cardiovascular Interventions.

“There has been no fundamental change in stent design in over 30 years,” declared Dr. Verheye, codirector of the Antwerp (Belgium) Cardiovascular Center. “The DynamX Bioadaptor is a fundamental innovation in device design.”

The investigational device is a 71-mcm-thick, cobalt-chromium metal platform that elutes novolimus from a biodegradable polymer. Circumferential rings in low-stress sections of the device are held together by polymer connectors, and when the polymer erodes at about 6 months the stent segments are able to disengage from each other while maintaining longitudinal continuity. Dr. Verheye called this process “uncaging” the stented artery. The result is restoration of normal vessel angulation and compliance; the artery is no longer artificially straightened and constrained by a relatively stiff stent. Positive adaptive remodeling is preserved with enhanced vessel pulsatility and maintenance of lumenal area for good blood flow.

Dr. Verheye said the impetus for developing this outside-the-box novel stent platform lies in the recognition of a major unmet need for better drug-eluting stent (DES) performance. “Despite excellent acute outcomes, data with current-generation DES show long-term event rates are high and accrue at a rate of 2%-3% per year without a plateau.”

He was coprincipal investigator for the international study, which included 50 patients who received a DynamX Bioadaptor for a single de novo coronary artery lesion no more than 24 mm in length. The acute performance of the device was similar to that of second-generation DES, with a mean acute gain post procedure of 1.63 mm by quantitative coronary angiography and a mean late lumen loss of 0.12 mm when measured again at 9 or 12 months.

Intravascular ultrasound imaging showed a 3% increase in mean target vessel area and a 5% increase in the stented area from post procedure to 9 or 12 months’ follow-up, with no change in mean lumen area, all of which translates into maintenance of good blood flow over time. In contrast, what typically occurs following implantation of current DES is maintenance of target vessel and device areas, but with a loss in mean lumen area, the cardiologist noted.

There were two cardiac deaths but no cases of target lesion revascularization, device thrombosis, or strut fracture within 12 months of the procedure.

“The Bioadaptor performs similarly to second-generation DES in terms of implantation technique, deliverability, conformability, and radial strength during the healing phase, while showing the promise of mitigating the 2%-3% annualized event rate beyond 1 year,” Dr. Verheye concluded, adding, “Obviously, longer-term follow-up in comparative studies will be needed to show a reduction in the device-oriented events that have been observed with current DES.”

Session cochair Davide Capodanno, MD, PhD, of the University of Catania (Italy), declared: “This is an intriguing device because it’s metal, but it’s a kind of pulsatile metal after the biodegradation of the connectors. It’s something I’ve never seen.”

Discussant William Wijns, MD, PhD, said he was “thrilled” by the innovative aspect of the DynamX Bioadaptor, but he’s a long way from being persuaded that the device’s potential physiological advantages will translate into improved clinical outcomes relative to current DES.

“Don’t we all have a strange feeling of deja vu because all these anticipated benefits are the same as those we were told we would see with fully bioresorbable scaffolds? And we know so much after 10 years of experience with bioresorbable scaffolds that probably we will not accept this great story unless we get more and more evidence,” cautioned Dr. Wijns, professor of interventional cardiology at the National University of Ireland, Galway, and chairman of EuroPCR.

The claim regarding bioresorbable scaffolds was that, even though the acute results weren’t as good as with DES, that disadvantage would be outweighed by superior long-term clinical outcomes. But in fact the long-term outcomes turned out to be worse as well.

“We had to give up immediate results with the bioresorbable scaffolds. I don’t think we want to go that route again this time,” the cardiologist said.

Thus, the first thing that’s needed in order to make a convincing case for the Bioadaptor is evidence from a large, randomized, comparative trial demonstrating that the acute performance of the novel device is noninferior to that of current DES, including data on complex lesions. Such a study was supposed to be underway now but has been delayed by the COVID-19 pandemic, he noted.

Once there is evidence that the acute results with the Bioadaptor are truly comparable with those achieved with current DES, there will be a need for long-term data showing that the device reduces the 2%-3% annualized event rate seen with DES beyond 1 year, Dr. Wijns added.

Dr. Verheye reported receiving consultation fees from study sponsor Elixir Medical as well as from Biotronik. Dr. Wijns reported receiving research grants from MicroPort.

[email protected]

The DynamX Bioadaptor – arguably the most original concept in coronary stent design to come along in 3 decades – demonstrated excellent safety and efficacy in a 12-month international, proof-of-concept study, Stefan Verheye, MD, said at the virtual annual meeting of the European Association of Percutaneous Cardiovascular Interventions.

“There has been no fundamental change in stent design in over 30 years,” declared Dr. Verheye, codirector of the Antwerp (Belgium) Cardiovascular Center. “The DynamX Bioadaptor is a fundamental innovation in device design.”

The investigational device is a 71-mcm-thick, cobalt-chromium metal platform that elutes novolimus from a biodegradable polymer. Circumferential rings in low-stress sections of the device are held together by polymer connectors, and when the polymer erodes at about 6 months the stent segments are able to disengage from each other while maintaining longitudinal continuity. Dr. Verheye called this process “uncaging” the stented artery. The result is restoration of normal vessel angulation and compliance; the artery is no longer artificially straightened and constrained by a relatively stiff stent. Positive adaptive remodeling is preserved with enhanced vessel pulsatility and maintenance of lumenal area for good blood flow.

Dr. Verheye said the impetus for developing this outside-the-box novel stent platform lies in the recognition of a major unmet need for better drug-eluting stent (DES) performance. “Despite excellent acute outcomes, data with current-generation DES show long-term event rates are high and accrue at a rate of 2%-3% per year without a plateau.”

He was coprincipal investigator for the international study, which included 50 patients who received a DynamX Bioadaptor for a single de novo coronary artery lesion no more than 24 mm in length. The acute performance of the device was similar to that of second-generation DES, with a mean acute gain post procedure of 1.63 mm by quantitative coronary angiography and a mean late lumen loss of 0.12 mm when measured again at 9 or 12 months.

Intravascular ultrasound imaging showed a 3% increase in mean target vessel area and a 5% increase in the stented area from post procedure to 9 or 12 months’ follow-up, with no change in mean lumen area, all of which translates into maintenance of good blood flow over time. In contrast, what typically occurs following implantation of current DES is maintenance of target vessel and device areas, but with a loss in mean lumen area, the cardiologist noted.

There were two cardiac deaths but no cases of target lesion revascularization, device thrombosis, or strut fracture within 12 months of the procedure.

“The Bioadaptor performs similarly to second-generation DES in terms of implantation technique, deliverability, conformability, and radial strength during the healing phase, while showing the promise of mitigating the 2%-3% annualized event rate beyond 1 year,” Dr. Verheye concluded, adding, “Obviously, longer-term follow-up in comparative studies will be needed to show a reduction in the device-oriented events that have been observed with current DES.”

Session cochair Davide Capodanno, MD, PhD, of the University of Catania (Italy), declared: “This is an intriguing device because it’s metal, but it’s a kind of pulsatile metal after the biodegradation of the connectors. It’s something I’ve never seen.”

Discussant William Wijns, MD, PhD, said he was “thrilled” by the innovative aspect of the DynamX Bioadaptor, but he’s a long way from being persuaded that the device’s potential physiological advantages will translate into improved clinical outcomes relative to current DES.

“Don’t we all have a strange feeling of deja vu because all these anticipated benefits are the same as those we were told we would see with fully bioresorbable scaffolds? And we know so much after 10 years of experience with bioresorbable scaffolds that probably we will not accept this great story unless we get more and more evidence,” cautioned Dr. Wijns, professor of interventional cardiology at the National University of Ireland, Galway, and chairman of EuroPCR.

The claim regarding bioresorbable scaffolds was that, even though the acute results weren’t as good as with DES, that disadvantage would be outweighed by superior long-term clinical outcomes. But in fact the long-term outcomes turned out to be worse as well.

“We had to give up immediate results with the bioresorbable scaffolds. I don’t think we want to go that route again this time,” the cardiologist said.

Thus, the first thing that’s needed in order to make a convincing case for the Bioadaptor is evidence from a large, randomized, comparative trial demonstrating that the acute performance of the novel device is noninferior to that of current DES, including data on complex lesions. Such a study was supposed to be underway now but has been delayed by the COVID-19 pandemic, he noted.

Once there is evidence that the acute results with the Bioadaptor are truly comparable with those achieved with current DES, there will be a need for long-term data showing that the device reduces the 2%-3% annualized event rate seen with DES beyond 1 year, Dr. Wijns added.

Dr. Verheye reported receiving consultation fees from study sponsor Elixir Medical as well as from Biotronik. Dr. Wijns reported receiving research grants from MicroPort.

[email protected]

Swapping out intravenous fentanyl in favor of IV acetaminophen in patients with ST-elevation MI (STEMI) provides comparable pain relief but with desirably higher blood levels of ticagrelor both immediately after primary percutaneous intervention and 1 hour post procedure.

Bruce Jancin/Frontline Medical News

That’s according to results of the Dutch ON-TIME 3 trial, presented by Anne H. Tavenier, MD, at the virtual annual meeting of the European Association of Percutaneous Cardiovascular Interventions.

“Our trial results have implications for the prehospital treatment of STEMI patients,” said Dr. Tavenier, a cardiologist at the Isala Clinic in Zwolle, the Netherlands.

The explanation for the success of this novel STEMI pain management strategy? The synthetic opioid fentanyl impairs gastrointestinal absorption of oral P2Y12 receptor antagonists such as ticagrelor. Opiates do so as well, whereas acetaminophen does not, she explained.

The potent platelet inhibition provided by oral P2Y12 inhibitors is crucial to successful primary PCI for STEMI. But these platelet inhibitory effects are inherently slowed in STEMI patients owing to hemodynamic changes and delayed GI absorption. And even though both American College of Cardiology/American Heart Association and European Society of Cardiology guidelines recommend the use of opioids for pain control in STEMI patients, the fact is that these medications further delay the absorption of oral P2Y12 inhibitors. And this delay is further exacerbated by the nausea and vomiting which are common side effects of IV fentanyl, she continued.

The impetus for the ON-TIME 3 trial was straightforward, the cardiologist said: “For years, STEMI patients have been treated with morphine or morphinelike drugs like fentanyl because of pain or sympathetic stress. To date, trials investigating alternative analgesics to opioids have been scarce.”

ON-TIME 3 was a multicenter, open-label, phase 4 clinical trial in which 195 STEMI patients with a self-reported pain score of at least 4 on a 0-10 scale received crushed ticagrelor in the ambulance along with either 1,000 mg of IV acetaminophen or fentanyl at 1-2 mcg/kg.

Ticagrelor blood levels were significantly higher in the IV acetaminophen group when measured just prior to primary PCI (151 ng/mL versus 60 ng/mL in the IV fentanyl group; immediately after PCI (326 versus 115 ng/mL), and 1 hour post PCI (488 versus 372 ng/mL).

However, there was no significant between-group difference in levels of platelet reactivity units measured immediately after primary PCI, Dr. Tavenier added.

Discussant Christoph K. Naber, MD, PhD, confessed that prior to ON-TIME 3 he was unaware that administering opioids to STEMI patients results in delayed absorption of oral P2Y12 inhibitors. Upon delving into the literature, however, he found that this is indeed a well-documented problem.

“The open question I have about this very elegant trial is whether the increased P2Y12 levels will translate into a measurable difference in clinical outcomes,” said Dr. Naber, an interventional cardiologist at the Wilhemshaven (Germany) Clinic.

The answer to that question would require a larger, longer-term trial. And he’s disinclined to wait around for that to happen.

“I think when we look at the risk balance, the risk of switching from an opioid to acetaminophen, if it works for the patient, is rather low. So this might be something to introduce in my practice,” the cardiologist said.

Dr. Tavenier and Dr. Naber reported having no financial conflicts of interest.

[email protected]

SOURCE: Tavenier AH. EuroPCR 2020.

Swapping out intravenous fentanyl in favor of IV acetaminophen in patients with ST-elevation MI (STEMI) provides comparable pain relief but with desirably higher blood levels of ticagrelor both immediately after primary percutaneous intervention and 1 hour post procedure.

Bruce Jancin/Frontline Medical News

That’s according to results of the Dutch ON-TIME 3 trial, presented by Anne H. Tavenier, MD, at the virtual annual meeting of the European Association of Percutaneous Cardiovascular Interventions.

“Our trial results have implications for the prehospital treatment of STEMI patients,” said Dr. Tavenier, a cardiologist at the Isala Clinic in Zwolle, the Netherlands.

The explanation for the success of this novel STEMI pain management strategy? The synthetic opioid fentanyl impairs gastrointestinal absorption of oral P2Y12 receptor antagonists such as ticagrelor. Opiates do so as well, whereas acetaminophen does not, she explained.

The potent platelet inhibition provided by oral P2Y12 inhibitors is crucial to successful primary PCI for STEMI. But these platelet inhibitory effects are inherently slowed in STEMI patients owing to hemodynamic changes and delayed GI absorption. And even though both American College of Cardiology/American Heart Association and European Society of Cardiology guidelines recommend the use of opioids for pain control in STEMI patients, the fact is that these medications further delay the absorption of oral P2Y12 inhibitors. And this delay is further exacerbated by the nausea and vomiting which are common side effects of IV fentanyl, she continued.

The impetus for the ON-TIME 3 trial was straightforward, the cardiologist said: “For years, STEMI patients have been treated with morphine or morphinelike drugs like fentanyl because of pain or sympathetic stress. To date, trials investigating alternative analgesics to opioids have been scarce.”

ON-TIME 3 was a multicenter, open-label, phase 4 clinical trial in which 195 STEMI patients with a self-reported pain score of at least 4 on a 0-10 scale received crushed ticagrelor in the ambulance along with either 1,000 mg of IV acetaminophen or fentanyl at 1-2 mcg/kg.

Ticagrelor blood levels were significantly higher in the IV acetaminophen group when measured just prior to primary PCI (151 ng/mL versus 60 ng/mL in the IV fentanyl group; immediately after PCI (326 versus 115 ng/mL), and 1 hour post PCI (488 versus 372 ng/mL).

However, there was no significant between-group difference in levels of platelet reactivity units measured immediately after primary PCI, Dr. Tavenier added.

Discussant Christoph K. Naber, MD, PhD, confessed that prior to ON-TIME 3 he was unaware that administering opioids to STEMI patients results in delayed absorption of oral P2Y12 inhibitors. Upon delving into the literature, however, he found that this is indeed a well-documented problem.

“The open question I have about this very elegant trial is whether the increased P2Y12 levels will translate into a measurable difference in clinical outcomes,” said Dr. Naber, an interventional cardiologist at the Wilhemshaven (Germany) Clinic.

The answer to that question would require a larger, longer-term trial. And he’s disinclined to wait around for that to happen.

“I think when we look at the risk balance, the risk of switching from an opioid to acetaminophen, if it works for the patient, is rather low. So this might be something to introduce in my practice,” the cardiologist said.

Dr. Tavenier and Dr. Naber reported having no financial conflicts of interest.

[email protected]

SOURCE: Tavenier AH. EuroPCR 2020.

Swapping out intravenous fentanyl in favor of IV acetaminophen in patients with ST-elevation MI (STEMI) provides comparable pain relief but with desirably higher blood levels of ticagrelor both immediately after primary percutaneous intervention and 1 hour post procedure.

Bruce Jancin/Frontline Medical News

That’s according to results of the Dutch ON-TIME 3 trial, presented by Anne H. Tavenier, MD, at the virtual annual meeting of the European Association of Percutaneous Cardiovascular Interventions.

“Our trial results have implications for the prehospital treatment of STEMI patients,” said Dr. Tavenier, a cardiologist at the Isala Clinic in Zwolle, the Netherlands.

The explanation for the success of this novel STEMI pain management strategy? The synthetic opioid fentanyl impairs gastrointestinal absorption of oral P2Y12 receptor antagonists such as ticagrelor. Opiates do so as well, whereas acetaminophen does not, she explained.

The potent platelet inhibition provided by oral P2Y12 inhibitors is crucial to successful primary PCI for STEMI. But these platelet inhibitory effects are inherently slowed in STEMI patients owing to hemodynamic changes and delayed GI absorption. And even though both American College of Cardiology/American Heart Association and European Society of Cardiology guidelines recommend the use of opioids for pain control in STEMI patients, the fact is that these medications further delay the absorption of oral P2Y12 inhibitors. And this delay is further exacerbated by the nausea and vomiting which are common side effects of IV fentanyl, she continued.

The impetus for the ON-TIME 3 trial was straightforward, the cardiologist said: “For years, STEMI patients have been treated with morphine or morphinelike drugs like fentanyl because of pain or sympathetic stress. To date, trials investigating alternative analgesics to opioids have been scarce.”

ON-TIME 3 was a multicenter, open-label, phase 4 clinical trial in which 195 STEMI patients with a self-reported pain score of at least 4 on a 0-10 scale received crushed ticagrelor in the ambulance along with either 1,000 mg of IV acetaminophen or fentanyl at 1-2 mcg/kg.

Ticagrelor blood levels were significantly higher in the IV acetaminophen group when measured just prior to primary PCI (151 ng/mL versus 60 ng/mL in the IV fentanyl group; immediately after PCI (326 versus 115 ng/mL), and 1 hour post PCI (488 versus 372 ng/mL).

However, there was no significant between-group difference in levels of platelet reactivity units measured immediately after primary PCI, Dr. Tavenier added.

Discussant Christoph K. Naber, MD, PhD, confessed that prior to ON-TIME 3 he was unaware that administering opioids to STEMI patients results in delayed absorption of oral P2Y12 inhibitors. Upon delving into the literature, however, he found that this is indeed a well-documented problem.

“The open question I have about this very elegant trial is whether the increased P2Y12 levels will translate into a measurable difference in clinical outcomes,” said Dr. Naber, an interventional cardiologist at the Wilhemshaven (Germany) Clinic.

The answer to that question would require a larger, longer-term trial. And he’s disinclined to wait around for that to happen.

“I think when we look at the risk balance, the risk of switching from an opioid to acetaminophen, if it works for the patient, is rather low. So this might be something to introduce in my practice,” the cardiologist said.

Dr. Tavenier and Dr. Naber reported having no financial conflicts of interest.

[email protected]

SOURCE: Tavenier AH. EuroPCR 2020.

Transcatheter implantation of the Tendyne mitral valve replacement device for treatment of mitral regurgitation in patients at prohibitive surgical risk because of severe mitral annular calcification showed considerable promise in a small feasibility study, Paul Sorajja, MD, reported at the virtual annual meeting of the European Association of Percutaneous Cardiovascular Interventions.

Bruce Jancin/MDedge News

There is a huge unmet need for safe and effective therapies for severe mitral annular calcification (MAC).

“Severe MAC often precludes surgical treatment, and there’s a poor prognosis in patients with MAC and mitral regurgitation when untreated, with 2-year survival of about 60% in some studies,” noted Dr. Sorajja, a cardiologist at the Minneapolis Heart Institute Foundation.

Attempts at repurposing transcatheter aortic valves for use in the mitral location have been largely unsatisfactory, he added.

The 6-month outcomes in the 11 patients who received the Tendyne device in the multicenter U.S. feasibility study featured low rates of mortality and nonfatal adverse events, elimination of mitral regurgitation, marked improvement on quality of life measures, and a mean gradient of 4.1 mm Hg. The acute procedural outcomes were encouraging as well.

“We had technical success in 11 of 11 patients, no procedural mortality or left ventricular outflow tract obstruction, no valve embolization or malposition, and no conversion to open heart surgery,” he said.

There was one death caused by mesenteric ischemia 16 days post Tendyne implantation. One patient experienced a nondisabling stroke at day 4. Two patients developed new-onset atrial fibrillation, one of whom cardioverted to sinus rhythm. And one patient had a moderate paravalvular leak that resolved with placement of a plug at 3 months. There were no MIs.

At baseline, 9 of 11 patients were New York Heart Association functional class III and the others were class II. At 6 months, six patients were class I, four were class II, and one was class III. The average score on the Kansas City Cardiomyopathy Questionnaire improved from 45.9 at baseline to 65.5 at 1 month, 77.4 at 3 months, and 70.3 at 6 months.

This was a highly selected study population with a Society of Thoracic Surgery Predicted Risk of Mortality score of 9.03%. Part of the screening process for study participation involved preprocedural CT imaging with simulated device overlay in order to identify candidates who were likely to have an optimal device fit.

Discussant Francesco Maisano, MD, was impressed by how well this simulation resembled the actual results as depicted in side-by-side pre- and postprocedural CT images presented by Dr. Sorajja.

“What really surprised me was the correlation between preprocedural simulation data and the actual CT scan after the procedure. This trial shows that the simulation works, and also that Tendyne is a great alternative to aortic valve-in-MAC for these very-high-risk patients,” said Dr. Maisano, professor of cardiac surgery at the University of Zürich and a pioneer of catheter-based mitral and tricuspid interventions.

Earlier this year the Tendyne device was approved in Europe for patients with mitral regurgitation who aren’t candidates for surgical valve replacement or transcatheter mitral valve repair. The approval does not, however, extend to MAC. The Abbott device remains investigational in the United States, where the pivotal SUMMIT trial is underway. In one arm of the trial, patients with mitral regurgitation are being randomized to the investigational Tendyne device or to Abbott’s MitraClip, which is approved for that indication. In the other arm, patients with severe MAC at prohibitive surgical risk will get the Tendyne device. Results are expected in 2020.

Dr. Sorajja reported receiving research grants from and serving as a consultant to Abbott, the feasibility study sponsor, as well as to several other medical device companies, as did Dr. Maisano.

[email protected]

Transcatheter implantation of the Tendyne mitral valve replacement device for treatment of mitral regurgitation in patients at prohibitive surgical risk because of severe mitral annular calcification showed considerable promise in a small feasibility study, Paul Sorajja, MD, reported at the virtual annual meeting of the European Association of Percutaneous Cardiovascular Interventions.

Bruce Jancin/MDedge News

There is a huge unmet need for safe and effective therapies for severe mitral annular calcification (MAC).

“Severe MAC often precludes surgical treatment, and there’s a poor prognosis in patients with MAC and mitral regurgitation when untreated, with 2-year survival of about 60% in some studies,” noted Dr. Sorajja, a cardiologist at the Minneapolis Heart Institute Foundation.

Attempts at repurposing transcatheter aortic valves for use in the mitral location have been largely unsatisfactory, he added.

The 6-month outcomes in the 11 patients who received the Tendyne device in the multicenter U.S. feasibility study featured low rates of mortality and nonfatal adverse events, elimination of mitral regurgitation, marked improvement on quality of life measures, and a mean gradient of 4.1 mm Hg. The acute procedural outcomes were encouraging as well.

“We had technical success in 11 of 11 patients, no procedural mortality or left ventricular outflow tract obstruction, no valve embolization or malposition, and no conversion to open heart surgery,” he said.

There was one death caused by mesenteric ischemia 16 days post Tendyne implantation. One patient experienced a nondisabling stroke at day 4. Two patients developed new-onset atrial fibrillation, one of whom cardioverted to sinus rhythm. And one patient had a moderate paravalvular leak that resolved with placement of a plug at 3 months. There were no MIs.

At baseline, 9 of 11 patients were New York Heart Association functional class III and the others were class II. At 6 months, six patients were class I, four were class II, and one was class III. The average score on the Kansas City Cardiomyopathy Questionnaire improved from 45.9 at baseline to 65.5 at 1 month, 77.4 at 3 months, and 70.3 at 6 months.

This was a highly selected study population with a Society of Thoracic Surgery Predicted Risk of Mortality score of 9.03%. Part of the screening process for study participation involved preprocedural CT imaging with simulated device overlay in order to identify candidates who were likely to have an optimal device fit.

Discussant Francesco Maisano, MD, was impressed by how well this simulation resembled the actual results as depicted in side-by-side pre- and postprocedural CT images presented by Dr. Sorajja.

“What really surprised me was the correlation between preprocedural simulation data and the actual CT scan after the procedure. This trial shows that the simulation works, and also that Tendyne is a great alternative to aortic valve-in-MAC for these very-high-risk patients,” said Dr. Maisano, professor of cardiac surgery at the University of Zürich and a pioneer of catheter-based mitral and tricuspid interventions.

Earlier this year the Tendyne device was approved in Europe for patients with mitral regurgitation who aren’t candidates for surgical valve replacement or transcatheter mitral valve repair. The approval does not, however, extend to MAC. The Abbott device remains investigational in the United States, where the pivotal SUMMIT trial is underway. In one arm of the trial, patients with mitral regurgitation are being randomized to the investigational Tendyne device or to Abbott’s MitraClip, which is approved for that indication. In the other arm, patients with severe MAC at prohibitive surgical risk will get the Tendyne device. Results are expected in 2020.

Dr. Sorajja reported receiving research grants from and serving as a consultant to Abbott, the feasibility study sponsor, as well as to several other medical device companies, as did Dr. Maisano.

[email protected]

Transcatheter implantation of the Tendyne mitral valve replacement device for treatment of mitral regurgitation in patients at prohibitive surgical risk because of severe mitral annular calcification showed considerable promise in a small feasibility study, Paul Sorajja, MD, reported at the virtual annual meeting of the European Association of Percutaneous Cardiovascular Interventions.

Bruce Jancin/MDedge News

There is a huge unmet need for safe and effective therapies for severe mitral annular calcification (MAC).

“Severe MAC often precludes surgical treatment, and there’s a poor prognosis in patients with MAC and mitral regurgitation when untreated, with 2-year survival of about 60% in some studies,” noted Dr. Sorajja, a cardiologist at the Minneapolis Heart Institute Foundation.

Attempts at repurposing transcatheter aortic valves for use in the mitral location have been largely unsatisfactory, he added.

The 6-month outcomes in the 11 patients who received the Tendyne device in the multicenter U.S. feasibility study featured low rates of mortality and nonfatal adverse events, elimination of mitral regurgitation, marked improvement on quality of life measures, and a mean gradient of 4.1 mm Hg. The acute procedural outcomes were encouraging as well.

“We had technical success in 11 of 11 patients, no procedural mortality or left ventricular outflow tract obstruction, no valve embolization or malposition, and no conversion to open heart surgery,” he said.

There was one death caused by mesenteric ischemia 16 days post Tendyne implantation. One patient experienced a nondisabling stroke at day 4. Two patients developed new-onset atrial fibrillation, one of whom cardioverted to sinus rhythm. And one patient had a moderate paravalvular leak that resolved with placement of a plug at 3 months. There were no MIs.

At baseline, 9 of 11 patients were New York Heart Association functional class III and the others were class II. At 6 months, six patients were class I, four were class II, and one was class III. The average score on the Kansas City Cardiomyopathy Questionnaire improved from 45.9 at baseline to 65.5 at 1 month, 77.4 at 3 months, and 70.3 at 6 months.

This was a highly selected study population with a Society of Thoracic Surgery Predicted Risk of Mortality score of 9.03%. Part of the screening process for study participation involved preprocedural CT imaging with simulated device overlay in order to identify candidates who were likely to have an optimal device fit.

Discussant Francesco Maisano, MD, was impressed by how well this simulation resembled the actual results as depicted in side-by-side pre- and postprocedural CT images presented by Dr. Sorajja.

“What really surprised me was the correlation between preprocedural simulation data and the actual CT scan after the procedure. This trial shows that the simulation works, and also that Tendyne is a great alternative to aortic valve-in-MAC for these very-high-risk patients,” said Dr. Maisano, professor of cardiac surgery at the University of Zürich and a pioneer of catheter-based mitral and tricuspid interventions.

Earlier this year the Tendyne device was approved in Europe for patients with mitral regurgitation who aren’t candidates for surgical valve replacement or transcatheter mitral valve repair. The approval does not, however, extend to MAC. The Abbott device remains investigational in the United States, where the pivotal SUMMIT trial is underway. In one arm of the trial, patients with mitral regurgitation are being randomized to the investigational Tendyne device or to Abbott’s MitraClip, which is approved for that indication. In the other arm, patients with severe MAC at prohibitive surgical risk will get the Tendyne device. Results are expected in 2020.

Dr. Sorajja reported receiving research grants from and serving as a consultant to Abbott, the feasibility study sponsor, as well as to several other medical device companies, as did Dr. Maisano.

[email protected]

Tirofiban is far superior to cangrelor at achieving rapid and potent inhibition of platelet aggregation in patients undergoing primary percutaneous coronary intervention for ST-elevation MI.

Frontline Medical News

And cangrelor, in turn, is superior to oral prasugrel, according to the randomized FABOLUS FASTER trial, Marco Valgimigli, MD, PhD, reported at the virtual annual meeting of the European Association of Percutaneous Cardiovascular Interventions.

Moreover, contrary to conventional wisdom, chewed prasugrel (Effient) proved no better than swallowing the tablets whole for platelet inhibition, said Dr. Valgimigli, an interventional cardiologist at the University of Bern (Switzerland).

He explained that standard administration of the newer oral P2Y12 inhibitors prasugrel and ticagrelor (Brilinta) in patients undergoing percutaneous coronary intervention (PCI) for ST-elevation MI (STEMI) does not provide optimal early inhibition of platelet aggregation. The parenteral antiplatelet drugs tirofiban and cangrelor have been shown to provide faster and more prolonged inhibition of platelet aggregation than the oral P2Y12 inhibitors.

But there has been no head-to-head comparative data for the glycoprotein IIb/IIIA inhibitor tirofiban (Aggrastat) and the P2Y12 inhibitor cangrelor (Kengreal) in the setting of primary PCI for STEMI. This was the impetus for FABOLUS FASTER, the first study to compare the pharmacodynamic effects of the two parenteral antiplatelet agents. The trial also looked at how these potent parenteral drugs, compared with chewed prasugrel, another previously unexamined yet highly practical issue.

The three-center, multinational, open-label FABOLUS FASTER trial randomized 122 patients undergoing primary PCI for STEMI to one of three arms: a standard intravenous bolus and 2-hour infusion of either the P2Y12 inhibitor cangrelor (Kengreal) or the glycoprotein IIb/IIIA inhibitor tirofiban (Aggrastat), followed in either case by 60 mg of oral prasugrel, or a third arm in which patients didn’t receive either drug but were instead randomized to a 60-mg loading dose of chewed or whole prasugrel tablets.

The primary study endpoint was inhibition of platelet aggregation at 30 minutes as measured by light transmittance aggregometry in response to 20 mcmol/L of adenosine diphosphate (ADP).

Tirofiban was the unequivocal winner with 95% inhibition, as compared with 34.1% with cangrelor, 10.5% with chewed prasugrel, and 6.3% with prasugrel swallowed whole, even though the concentration of prasugrel’s active metabolite was far greater at 62.3 ng/mL after prasugrel was chewed, compared with 17.1 ng/mL when swallowed in integral tablet form.

The rate of nonresponsiveness to tirofiban as defined by greater than 59% platelet aggregation was zero for tirofiban during its 2-hour infusion, then a scant 8% thereafter during repeated testing at 3 and 4-6 hours. In contrast, the cangrelor nonresponsiveness rate was 50%-58% during the 2-hour infusion, rising to 82% at 3 hours.

FABOLUS FASTER, while not powered for clinical endpoints, might nevertheless have important clinical implications, according to Dr. Valgimigli. First, the superiority of the intravenous drugs tirofiban and cangrelor over prasugrel for early, strong platelet inhibition underscores the importance of giving parenteral antiplatelet drugs over oral therapy during the acute phase of STEMI therapy. Moreover, tirofiban’s outstanding performance – and the high residual platelet reactivity associated with cangrelor – makes a strong case for large comparative, randomized trials of the two drugs, with hard clinical endpoints.

Bruce Jancin/Frontline Medical News

Discussant Christoph K. Naber, MD, PhD, opined that he personally doesn’t consider the FABOLUS FASTER results practice changing, for a couple of reasons.

“Platelet inhibition measured by ADP in vitro is not necessarily related to true effects in vivo. We know that platelets are activated by multiple mechanisms, and the ADP pathway is just one of them,” said Dr. Naber, an interventional cardiologist at the Wilhemshaven (Germany) Clinic.

Also, there’s a good reason why no glycoprotein IIb/IIIA inhibitors are approved for treatment of STEMI, and why tirofiban, despite its impressive antiplatelet effects, is currently largely reserved for bailout situations, such as complex lesions with large thrombus burden. It’s because tirofiban’s potent antiplatelet activity is accompanied by a high risk of bleeding, he added.

However, Dr. Valgimigli noted that this conviction about excessive bleeding risk is mainly based on older studies in which glycoprotein IIb/IIIA inhibitors were administered for prolonged duration through femoral access sites. He argued that it’s time for large clinical trials examining the risk/benefit ratio of short infusion of these agents in the contemporary practice of primary PCI for STEMI.

Simultaneously with Dr. Valgimigli’s presentation, the FABOLUS FASTER results were published online (Circulation. 2020 Jun 27; doi: 10.1161/CIRCULATIONAHA.120.046928).

Dr. Valgimigli reported that Medicure, the sponsor of the FABOLUS FASTER trial, provided an institutional research grant to conduct the study. He also disclosed receiving research grants and personal fees outside the scope of this study from a dozen pharmaceutical and medical device companies. Dr. Naber reported having no financial conflicts.

[email protected]

Tirofiban is far superior to cangrelor at achieving rapid and potent inhibition of platelet aggregation in patients undergoing primary percutaneous coronary intervention for ST-elevation MI.

Frontline Medical News

And cangrelor, in turn, is superior to oral prasugrel, according to the randomized FABOLUS FASTER trial, Marco Valgimigli, MD, PhD, reported at the virtual annual meeting of the European Association of Percutaneous Cardiovascular Interventions.

Moreover, contrary to conventional wisdom, chewed prasugrel (Effient) proved no better than swallowing the tablets whole for platelet inhibition, said Dr. Valgimigli, an interventional cardiologist at the University of Bern (Switzerland).

He explained that standard administration of the newer oral P2Y12 inhibitors prasugrel and ticagrelor (Brilinta) in patients undergoing percutaneous coronary intervention (PCI) for ST-elevation MI (STEMI) does not provide optimal early inhibition of platelet aggregation. The parenteral antiplatelet drugs tirofiban and cangrelor have been shown to provide faster and more prolonged inhibition of platelet aggregation than the oral P2Y12 inhibitors.

But there has been no head-to-head comparative data for the glycoprotein IIb/IIIA inhibitor tirofiban (Aggrastat) and the P2Y12 inhibitor cangrelor (Kengreal) in the setting of primary PCI for STEMI. This was the impetus for FABOLUS FASTER, the first study to compare the pharmacodynamic effects of the two parenteral antiplatelet agents. The trial also looked at how these potent parenteral drugs, compared with chewed prasugrel, another previously unexamined yet highly practical issue.

The three-center, multinational, open-label FABOLUS FASTER trial randomized 122 patients undergoing primary PCI for STEMI to one of three arms: a standard intravenous bolus and 2-hour infusion of either the P2Y12 inhibitor cangrelor (Kengreal) or the glycoprotein IIb/IIIA inhibitor tirofiban (Aggrastat), followed in either case by 60 mg of oral prasugrel, or a third arm in which patients didn’t receive either drug but were instead randomized to a 60-mg loading dose of chewed or whole prasugrel tablets.

The primary study endpoint was inhibition of platelet aggregation at 30 minutes as measured by light transmittance aggregometry in response to 20 mcmol/L of adenosine diphosphate (ADP).

Tirofiban was the unequivocal winner with 95% inhibition, as compared with 34.1% with cangrelor, 10.5% with chewed prasugrel, and 6.3% with prasugrel swallowed whole, even though the concentration of prasugrel’s active metabolite was far greater at 62.3 ng/mL after prasugrel was chewed, compared with 17.1 ng/mL when swallowed in integral tablet form.

The rate of nonresponsiveness to tirofiban as defined by greater than 59% platelet aggregation was zero for tirofiban during its 2-hour infusion, then a scant 8% thereafter during repeated testing at 3 and 4-6 hours. In contrast, the cangrelor nonresponsiveness rate was 50%-58% during the 2-hour infusion, rising to 82% at 3 hours.

FABOLUS FASTER, while not powered for clinical endpoints, might nevertheless have important clinical implications, according to Dr. Valgimigli. First, the superiority of the intravenous drugs tirofiban and cangrelor over prasugrel for early, strong platelet inhibition underscores the importance of giving parenteral antiplatelet drugs over oral therapy during the acute phase of STEMI therapy. Moreover, tirofiban’s outstanding performance – and the high residual platelet reactivity associated with cangrelor – makes a strong case for large comparative, randomized trials of the two drugs, with hard clinical endpoints.

Bruce Jancin/Frontline Medical News

Discussant Christoph K. Naber, MD, PhD, opined that he personally doesn’t consider the FABOLUS FASTER results practice changing, for a couple of reasons.

“Platelet inhibition measured by ADP in vitro is not necessarily related to true effects in vivo. We know that platelets are activated by multiple mechanisms, and the ADP pathway is just one of them,” said Dr. Naber, an interventional cardiologist at the Wilhemshaven (Germany) Clinic.

Also, there’s a good reason why no glycoprotein IIb/IIIA inhibitors are approved for treatment of STEMI, and why tirofiban, despite its impressive antiplatelet effects, is currently largely reserved for bailout situations, such as complex lesions with large thrombus burden. It’s because tirofiban’s potent antiplatelet activity is accompanied by a high risk of bleeding, he added.

However, Dr. Valgimigli noted that this conviction about excessive bleeding risk is mainly based on older studies in which glycoprotein IIb/IIIA inhibitors were administered for prolonged duration through femoral access sites. He argued that it’s time for large clinical trials examining the risk/benefit ratio of short infusion of these agents in the contemporary practice of primary PCI for STEMI.

Simultaneously with Dr. Valgimigli’s presentation, the FABOLUS FASTER results were published online (Circulation. 2020 Jun 27; doi: 10.1161/CIRCULATIONAHA.120.046928).

Dr. Valgimigli reported that Medicure, the sponsor of the FABOLUS FASTER trial, provided an institutional research grant to conduct the study. He also disclosed receiving research grants and personal fees outside the scope of this study from a dozen pharmaceutical and medical device companies. Dr. Naber reported having no financial conflicts.

[email protected]

Tirofiban is far superior to cangrelor at achieving rapid and potent inhibition of platelet aggregation in patients undergoing primary percutaneous coronary intervention for ST-elevation MI.

Frontline Medical News

And cangrelor, in turn, is superior to oral prasugrel, according to the randomized FABOLUS FASTER trial, Marco Valgimigli, MD, PhD, reported at the virtual annual meeting of the European Association of Percutaneous Cardiovascular Interventions.

Moreover, contrary to conventional wisdom, chewed prasugrel (Effient) proved no better than swallowing the tablets whole for platelet inhibition, said Dr. Valgimigli, an interventional cardiologist at the University of Bern (Switzerland).

He explained that standard administration of the newer oral P2Y12 inhibitors prasugrel and ticagrelor (Brilinta) in patients undergoing percutaneous coronary intervention (PCI) for ST-elevation MI (STEMI) does not provide optimal early inhibition of platelet aggregation. The parenteral antiplatelet drugs tirofiban and cangrelor have been shown to provide faster and more prolonged inhibition of platelet aggregation than the oral P2Y12 inhibitors.

But there has been no head-to-head comparative data for the glycoprotein IIb/IIIA inhibitor tirofiban (Aggrastat) and the P2Y12 inhibitor cangrelor (Kengreal) in the setting of primary PCI for STEMI. This was the impetus for FABOLUS FASTER, the first study to compare the pharmacodynamic effects of the two parenteral antiplatelet agents. The trial also looked at how these potent parenteral drugs, compared with chewed prasugrel, another previously unexamined yet highly practical issue.

The three-center, multinational, open-label FABOLUS FASTER trial randomized 122 patients undergoing primary PCI for STEMI to one of three arms: a standard intravenous bolus and 2-hour infusion of either the P2Y12 inhibitor cangrelor (Kengreal) or the glycoprotein IIb/IIIA inhibitor tirofiban (Aggrastat), followed in either case by 60 mg of oral prasugrel, or a third arm in which patients didn’t receive either drug but were instead randomized to a 60-mg loading dose of chewed or whole prasugrel tablets.

The primary study endpoint was inhibition of platelet aggregation at 30 minutes as measured by light transmittance aggregometry in response to 20 mcmol/L of adenosine diphosphate (ADP).

Tirofiban was the unequivocal winner with 95% inhibition, as compared with 34.1% with cangrelor, 10.5% with chewed prasugrel, and 6.3% with prasugrel swallowed whole, even though the concentration of prasugrel’s active metabolite was far greater at 62.3 ng/mL after prasugrel was chewed, compared with 17.1 ng/mL when swallowed in integral tablet form.

The rate of nonresponsiveness to tirofiban as defined by greater than 59% platelet aggregation was zero for tirofiban during its 2-hour infusion, then a scant 8% thereafter during repeated testing at 3 and 4-6 hours. In contrast, the cangrelor nonresponsiveness rate was 50%-58% during the 2-hour infusion, rising to 82% at 3 hours.

FABOLUS FASTER, while not powered for clinical endpoints, might nevertheless have important clinical implications, according to Dr. Valgimigli. First, the superiority of the intravenous drugs tirofiban and cangrelor over prasugrel for early, strong platelet inhibition underscores the importance of giving parenteral antiplatelet drugs over oral therapy during the acute phase of STEMI therapy. Moreover, tirofiban’s outstanding performance – and the high residual platelet reactivity associated with cangrelor – makes a strong case for large comparative, randomized trials of the two drugs, with hard clinical endpoints.

Bruce Jancin/Frontline Medical News

Discussant Christoph K. Naber, MD, PhD, opined that he personally doesn’t consider the FABOLUS FASTER results practice changing, for a couple of reasons.

“Platelet inhibition measured by ADP in vitro is not necessarily related to true effects in vivo. We know that platelets are activated by multiple mechanisms, and the ADP pathway is just one of them,” said Dr. Naber, an interventional cardiologist at the Wilhemshaven (Germany) Clinic.

Also, there’s a good reason why no glycoprotein IIb/IIIA inhibitors are approved for treatment of STEMI, and why tirofiban, despite its impressive antiplatelet effects, is currently largely reserved for bailout situations, such as complex lesions with large thrombus burden. It’s because tirofiban’s potent antiplatelet activity is accompanied by a high risk of bleeding, he added.

However, Dr. Valgimigli noted that this conviction about excessive bleeding risk is mainly based on older studies in which glycoprotein IIb/IIIA inhibitors were administered for prolonged duration through femoral access sites. He argued that it’s time for large clinical trials examining the risk/benefit ratio of short infusion of these agents in the contemporary practice of primary PCI for STEMI.

Simultaneously with Dr. Valgimigli’s presentation, the FABOLUS FASTER results were published online (Circulation. 2020 Jun 27; doi: 10.1161/CIRCULATIONAHA.120.046928).

Dr. Valgimigli reported that Medicure, the sponsor of the FABOLUS FASTER trial, provided an institutional research grant to conduct the study. He also disclosed receiving research grants and personal fees outside the scope of this study from a dozen pharmaceutical and medical device companies. Dr. Naber reported having no financial conflicts.

[email protected]

Coronary revascularization does not confer a survival advantage over initial medical therapy in patients with stable ischemic heart disease (SIHD) but reduces unstable angina, according to a new study-level meta-analysis.

Routine upfront revascularization is also associated with less spontaneous myocardial infarction but this is at the cost of increased procedural infarctions, reported lead investigator Sripal Bangalore, MD, of New York University.

“These relationships should be taken into consideration for shared decision-making for the management of patients with stable ischemic heart disease,” he said in a late-breaking trial session at PCR e-Course 2020, the virtual meeting of the Congress of European Association of Percutaneous Cardiovascular Interventions (EuroPCR).

The results, simultaneously published in Circulation, are consistent with last year’s ISCHEMIA trial and other contemporary trials, such as COURAGE, FAME 2, and BARI 2D, that have failed to show a reduction in mortality with revascularization alone in SIHD. Guidelines continue, however, to recommend revascularization to improve survival in SIHD based on trials performed in the 1980s when medical therapy was limited, Dr. Bangalore observed.

The updated meta-analysis included 14 randomized controlled trials, including the aforementioned, and 14,877 patients followed for a weighted mean of 4.5 years. Most trials enrolled patients who had preserved left ventricular function and low symptom burden (Canadian Cardiovascular Society Class I/II).

In the revascularization group, 87.5% of patients underwent any revascularization. Percutaneous coronary intervention (PCI) was the first procedure in 71.3% and bypass surgery the first choice in 16.2%. In eight trials, stents were used in at least 50% of PCI patients; drug-eluting stents were mainly used in FAME 2, ISCHEMIA, and ISCHEMIA-CKD.

In eight trials, statins were used in at least 50% of patients. Nearly 1 in 3 patients (31.9%) treated initially with medical therapy underwent revascularization during follow-up.

Results show no reduction in mortality risk with routine revascularization in the overall analysis (relative risk, 0.99; 95% confidence interval, 0.90-1.09) or when analyzed by whether studies did or did not use stents (P for interaction = .85).

Trial sequential analysis also showed that the cumulative z-curve crossed the futility boundary, “suggesting we have great data to show that there is lack of even a 10% reduction in death with revascularization,” Dr. Bangalore said.

Results were very similar for cardiovascular death (RR, 0.92; 95% CI, 0.80-1.06), including when analyzed by study stent status (P for interaction = .60).

There was no significant reduction in overall MI risk with revascularization, although a borderline significant 11% decrease in MIs was found in the contemporary stent era trials (RR, 0.89; 95% CI, 0.80-0.998).

Revascularization was associated with a 148% increase in the risk of procedural MI (RR, 2.48; 95% CI, 1.86-3.31) but reduced risk of spontaneous MI (RR, 0.76; 95% CI, 0.67-0.85).

Unstable angina was reduced in patients undergoing revascularization (RR, 0.64; 95% CI, 0.45-0.92), driven by a 55% reduction in the contemporary stent era trials. Freedom from angina was also greater with routine revascularization but the difference was modest, Dr. Bangalore said. There was no difference between the two strategies in heart failure or stroke.

“This meta-analysis is well done but really doesn’t change what we already know,” Rasha Al-Lamee, MBBS, of Imperial College, London, said in an interview. “The most important message is that intervention in stable CAD does not change survival. We don’t need to rush to intervene: We have time to plan the best strategy for each patient and to modify our plans based on their response.”

The analysis addresses some of the issues with previous meta-analyses that have included trials that were not strictly stable CAD trials such as SWISSI-2, COMPARE-ACUTE, and DANAMI-3-PRIMULTI, she noted. “However a study like this is only as good as the trials that are included. We must remember that unblinded trials really cannot be used to accurately assess endpoints that are prone to bias such as unstable angina and freedom from angina.”

Following the presentation, dedicated discussant Davide Capodanno, MD, PhD, of the University of Catania (Italy) said, “We have seen beyond any doubt that there is no difference in mortality. For cardiovascular death, it’s pretty much the same. It’s a little bit more mixed and nuanced, the story of myocardial infarction.”

“Additional science is needed to understand the prognostic implications,” he said. “Of course we know that spontaneous myocardial infarction is bad, but I’m not so sure about periprocedural MI. Is this something that is as important as spontaneous myocardial infarction?”

The meta-analysis is the largest ever performed, but there was clinical heterogeneity in the individual studies, especially in the definition of MI, Dr. Capodanno observed. Because of the use of trial-level data rather than patient-level data, the analysis also could not account for adherence to treatment or the effect of stent type or medication dosage.

The MI issue really depends on the trial definition of MI, Dr. Al-Lamee said. “We need long-term follow-up from ISCHEMIA to understand what it means for our patients. While revascularization clearly increases procedural MI rates, it also results in lower spontaneous MI rates with no impact on overall MI or death,” she said. “We will only know if these MIs are important if we see what impact they have in the long term.”

Although the meta-analysis combined data from several decades, it’s likely that the outdated revascularization techniques in the older trials are balanced out by the outdated medical therapy in the same trials, Dr. Al-Lamee observed.

The new findings can certainly be used in patient-physician discussions, with more follow-up from ISCHEMIA to provide additional insights, she said.

“We will of course hear more about the placebo-controlled efficacy of PCI in the blinded ORBITA-2 trial. And I would really like to see some of the older studies of patients and perceptions of the effect of PCI repeated,” Dr. Al-Lamee said. “Now we have more data, are we informing our patients and referrers correctly of the impact of our procedures, and do they truly choose revascularization with a true awareness of what it does and does not do?”

Dr. Bangalore reported grants from the National Heart, Lung, and Blood Institute and Abbott Vascular; and serving on the advisory boards of Abbott Vascular, Biotronik, Meril, SMT, Pfizer, Amgen, and Reata. Dr. Al-Lamee reported speaker’s honorarium from Philips Volcano and Menarini Pharmaceuticals. Dr. Capodanno has disclosed no relevant financial relationships.

A version of this article originally appeared on Medscape.com.

Coronary revascularization does not confer a survival advantage over initial medical therapy in patients with stable ischemic heart disease (SIHD) but reduces unstable angina, according to a new study-level meta-analysis.

Routine upfront revascularization is also associated with less spontaneous myocardial infarction but this is at the cost of increased procedural infarctions, reported lead investigator Sripal Bangalore, MD, of New York University.

“These relationships should be taken into consideration for shared decision-making for the management of patients with stable ischemic heart disease,” he said in a late-breaking trial session at PCR e-Course 2020, the virtual meeting of the Congress of European Association of Percutaneous Cardiovascular Interventions (EuroPCR).

The results, simultaneously published in Circulation, are consistent with last year’s ISCHEMIA trial and other contemporary trials, such as COURAGE, FAME 2, and BARI 2D, that have failed to show a reduction in mortality with revascularization alone in SIHD. Guidelines continue, however, to recommend revascularization to improve survival in SIHD based on trials performed in the 1980s when medical therapy was limited, Dr. Bangalore observed.

The updated meta-analysis included 14 randomized controlled trials, including the aforementioned, and 14,877 patients followed for a weighted mean of 4.5 years. Most trials enrolled patients who had preserved left ventricular function and low symptom burden (Canadian Cardiovascular Society Class I/II).

In the revascularization group, 87.5% of patients underwent any revascularization. Percutaneous coronary intervention (PCI) was the first procedure in 71.3% and bypass surgery the first choice in 16.2%. In eight trials, stents were used in at least 50% of PCI patients; drug-eluting stents were mainly used in FAME 2, ISCHEMIA, and ISCHEMIA-CKD.

In eight trials, statins were used in at least 50% of patients. Nearly 1 in 3 patients (31.9%) treated initially with medical therapy underwent revascularization during follow-up.

Results show no reduction in mortality risk with routine revascularization in the overall analysis (relative risk, 0.99; 95% confidence interval, 0.90-1.09) or when analyzed by whether studies did or did not use stents (P for interaction = .85).

Trial sequential analysis also showed that the cumulative z-curve crossed the futility boundary, “suggesting we have great data to show that there is lack of even a 10% reduction in death with revascularization,” Dr. Bangalore said.

Results were very similar for cardiovascular death (RR, 0.92; 95% CI, 0.80-1.06), including when analyzed by study stent status (P for interaction = .60).

There was no significant reduction in overall MI risk with revascularization, although a borderline significant 11% decrease in MIs was found in the contemporary stent era trials (RR, 0.89; 95% CI, 0.80-0.998).

Revascularization was associated with a 148% increase in the risk of procedural MI (RR, 2.48; 95% CI, 1.86-3.31) but reduced risk of spontaneous MI (RR, 0.76; 95% CI, 0.67-0.85).

Unstable angina was reduced in patients undergoing revascularization (RR, 0.64; 95% CI, 0.45-0.92), driven by a 55% reduction in the contemporary stent era trials. Freedom from angina was also greater with routine revascularization but the difference was modest, Dr. Bangalore said. There was no difference between the two strategies in heart failure or stroke.

“This meta-analysis is well done but really doesn’t change what we already know,” Rasha Al-Lamee, MBBS, of Imperial College, London, said in an interview. “The most important message is that intervention in stable CAD does not change survival. We don’t need to rush to intervene: We have time to plan the best strategy for each patient and to modify our plans based on their response.”

The analysis addresses some of the issues with previous meta-analyses that have included trials that were not strictly stable CAD trials such as SWISSI-2, COMPARE-ACUTE, and DANAMI-3-PRIMULTI, she noted. “However a study like this is only as good as the trials that are included. We must remember that unblinded trials really cannot be used to accurately assess endpoints that are prone to bias such as unstable angina and freedom from angina.”

Following the presentation, dedicated discussant Davide Capodanno, MD, PhD, of the University of Catania (Italy) said, “We have seen beyond any doubt that there is no difference in mortality. For cardiovascular death, it’s pretty much the same. It’s a little bit more mixed and nuanced, the story of myocardial infarction.”

“Additional science is needed to understand the prognostic implications,” he said. “Of course we know that spontaneous myocardial infarction is bad, but I’m not so sure about periprocedural MI. Is this something that is as important as spontaneous myocardial infarction?”

The meta-analysis is the largest ever performed, but there was clinical heterogeneity in the individual studies, especially in the definition of MI, Dr. Capodanno observed. Because of the use of trial-level data rather than patient-level data, the analysis also could not account for adherence to treatment or the effect of stent type or medication dosage.

The MI issue really depends on the trial definition of MI, Dr. Al-Lamee said. “We need long-term follow-up from ISCHEMIA to understand what it means for our patients. While revascularization clearly increases procedural MI rates, it also results in lower spontaneous MI rates with no impact on overall MI or death,” she said. “We will only know if these MIs are important if we see what impact they have in the long term.”

Although the meta-analysis combined data from several decades, it’s likely that the outdated revascularization techniques in the older trials are balanced out by the outdated medical therapy in the same trials, Dr. Al-Lamee observed.

The new findings can certainly be used in patient-physician discussions, with more follow-up from ISCHEMIA to provide additional insights, she said.

“We will of course hear more about the placebo-controlled efficacy of PCI in the blinded ORBITA-2 trial. And I would really like to see some of the older studies of patients and perceptions of the effect of PCI repeated,” Dr. Al-Lamee said. “Now we have more data, are we informing our patients and referrers correctly of the impact of our procedures, and do they truly choose revascularization with a true awareness of what it does and does not do?”

Dr. Bangalore reported grants from the National Heart, Lung, and Blood Institute and Abbott Vascular; and serving on the advisory boards of Abbott Vascular, Biotronik, Meril, SMT, Pfizer, Amgen, and Reata. Dr. Al-Lamee reported speaker’s honorarium from Philips Volcano and Menarini Pharmaceuticals. Dr. Capodanno has disclosed no relevant financial relationships.

A version of this article originally appeared on Medscape.com.

Coronary revascularization does not confer a survival advantage over initial medical therapy in patients with stable ischemic heart disease (SIHD) but reduces unstable angina, according to a new study-level meta-analysis.

Routine upfront revascularization is also associated with less spontaneous myocardial infarction but this is at the cost of increased procedural infarctions, reported lead investigator Sripal Bangalore, MD, of New York University.

“These relationships should be taken into consideration for shared decision-making for the management of patients with stable ischemic heart disease,” he said in a late-breaking trial session at PCR e-Course 2020, the virtual meeting of the Congress of European Association of Percutaneous Cardiovascular Interventions (EuroPCR).

The results, simultaneously published in Circulation, are consistent with last year’s ISCHEMIA trial and other contemporary trials, such as COURAGE, FAME 2, and BARI 2D, that have failed to show a reduction in mortality with revascularization alone in SIHD. Guidelines continue, however, to recommend revascularization to improve survival in SIHD based on trials performed in the 1980s when medical therapy was limited, Dr. Bangalore observed.

The updated meta-analysis included 14 randomized controlled trials, including the aforementioned, and 14,877 patients followed for a weighted mean of 4.5 years. Most trials enrolled patients who had preserved left ventricular function and low symptom burden (Canadian Cardiovascular Society Class I/II).

In the revascularization group, 87.5% of patients underwent any revascularization. Percutaneous coronary intervention (PCI) was the first procedure in 71.3% and bypass surgery the first choice in 16.2%. In eight trials, stents were used in at least 50% of PCI patients; drug-eluting stents were mainly used in FAME 2, ISCHEMIA, and ISCHEMIA-CKD.

In eight trials, statins were used in at least 50% of patients. Nearly 1 in 3 patients (31.9%) treated initially with medical therapy underwent revascularization during follow-up.

Results show no reduction in mortality risk with routine revascularization in the overall analysis (relative risk, 0.99; 95% confidence interval, 0.90-1.09) or when analyzed by whether studies did or did not use stents (P for interaction = .85).

Trial sequential analysis also showed that the cumulative z-curve crossed the futility boundary, “suggesting we have great data to show that there is lack of even a 10% reduction in death with revascularization,” Dr. Bangalore said.

Results were very similar for cardiovascular death (RR, 0.92; 95% CI, 0.80-1.06), including when analyzed by study stent status (P for interaction = .60).

There was no significant reduction in overall MI risk with revascularization, although a borderline significant 11% decrease in MIs was found in the contemporary stent era trials (RR, 0.89; 95% CI, 0.80-0.998).

Revascularization was associated with a 148% increase in the risk of procedural MI (RR, 2.48; 95% CI, 1.86-3.31) but reduced risk of spontaneous MI (RR, 0.76; 95% CI, 0.67-0.85).

Unstable angina was reduced in patients undergoing revascularization (RR, 0.64; 95% CI, 0.45-0.92), driven by a 55% reduction in the contemporary stent era trials. Freedom from angina was also greater with routine revascularization but the difference was modest, Dr. Bangalore said. There was no difference between the two strategies in heart failure or stroke.

“This meta-analysis is well done but really doesn’t change what we already know,” Rasha Al-Lamee, MBBS, of Imperial College, London, said in an interview. “The most important message is that intervention in stable CAD does not change survival. We don’t need to rush to intervene: We have time to plan the best strategy for each patient and to modify our plans based on their response.”

The analysis addresses some of the issues with previous meta-analyses that have included trials that were not strictly stable CAD trials such as SWISSI-2, COMPARE-ACUTE, and DANAMI-3-PRIMULTI, she noted. “However a study like this is only as good as the trials that are included. We must remember that unblinded trials really cannot be used to accurately assess endpoints that are prone to bias such as unstable angina and freedom from angina.”

Following the presentation, dedicated discussant Davide Capodanno, MD, PhD, of the University of Catania (Italy) said, “We have seen beyond any doubt that there is no difference in mortality. For cardiovascular death, it’s pretty much the same. It’s a little bit more mixed and nuanced, the story of myocardial infarction.”

“Additional science is needed to understand the prognostic implications,” he said. “Of course we know that spontaneous myocardial infarction is bad, but I’m not so sure about periprocedural MI. Is this something that is as important as spontaneous myocardial infarction?”

The meta-analysis is the largest ever performed, but there was clinical heterogeneity in the individual studies, especially in the definition of MI, Dr. Capodanno observed. Because of the use of trial-level data rather than patient-level data, the analysis also could not account for adherence to treatment or the effect of stent type or medication dosage.

The MI issue really depends on the trial definition of MI, Dr. Al-Lamee said. “We need long-term follow-up from ISCHEMIA to understand what it means for our patients. While revascularization clearly increases procedural MI rates, it also results in lower spontaneous MI rates with no impact on overall MI or death,” she said. “We will only know if these MIs are important if we see what impact they have in the long term.”

Although the meta-analysis combined data from several decades, it’s likely that the outdated revascularization techniques in the older trials are balanced out by the outdated medical therapy in the same trials, Dr. Al-Lamee observed.

The new findings can certainly be used in patient-physician discussions, with more follow-up from ISCHEMIA to provide additional insights, she said.

“We will of course hear more about the placebo-controlled efficacy of PCI in the blinded ORBITA-2 trial. And I would really like to see some of the older studies of patients and perceptions of the effect of PCI repeated,” Dr. Al-Lamee said. “Now we have more data, are we informing our patients and referrers correctly of the impact of our procedures, and do they truly choose revascularization with a true awareness of what it does and does not do?”

Dr. Bangalore reported grants from the National Heart, Lung, and Blood Institute and Abbott Vascular; and serving on the advisory boards of Abbott Vascular, Biotronik, Meril, SMT, Pfizer, Amgen, and Reata. Dr. Al-Lamee reported speaker’s honorarium from Philips Volcano and Menarini Pharmaceuticals. Dr. Capodanno has disclosed no relevant financial relationships.

A version of this article originally appeared on Medscape.com.

A systematic two-stent approach to complex coronary bifurcation lesions led to significantly improved clinical outcomes at 1 year, compared with the long-popular provisional stenting technique, in the first randomized trial to prospectively validate a standardized definition of what constitutes a complex bifurcation.

Since the double-kissing (DK) crush technique was employed in 78% of the systematic two-stent procedures, and the two-stent approach provided superior outcomes, it’s reasonable to infer that the DK crush is the preferred technique in patients with truly complex coronary bifurcation lesions (CBLs), Shao-Liang Chen, MD, reported at the virtual annual meeting of the European Association of Percutaneous Cardiovascular Interventions.

He presented the results of the DEFINITION II trial, a multinational trial in which 653 patients at 49 medical centers who fulfilled the criteria for complex CBLs were randomized to a systematic two-stent approach or provisional stenting, with a second stent deployed by interventionalists as needed. Dr. Chen, director of the cardiology department and deputy president of Nanjing (China) Medical University, and coworkers had previously published their standardized criteria for CBLs (JACC Cardiovasc Interv. 2014 Nov;7[11]:1266-76), which they developed by analysis of a large bifurcation cohort; however, until the DEFINITION II trial, the criteria had never been used in a prospective randomized trial.

According to the standardized definition developed by Dr. Chen and associates, complex coronary bifurcation lesions must meet one major and two minor criteria.

Major criteria:

• A side branch lesion length of at least 10 mm with a diameter stenosis of 70% or more for distal left main bifurcation lesions.
• For non–left main bifurcation lesions, a side branch diameter stenosis of at least 90% along with a side branch lesion length of at least 10 mm.

Minor criteria:

• Moderate to severe calcification multiple lesions
• Bifurcation angle of <45 degrees or >70 degrees
• Thrombus-containing lesions
• Main vessel residual diameter <2.5 mm
• Main vessel lesion length of at least 25 mm

Interventionalists were strongly encouraged to utilize the DK crush or culotte stenting techniques in patients randomized to the systematic two-stent approach. In contrast, in the provisional stenting group, where 23% of patients received a second stent, that stent was placed using the T and small protrusion technique 64% of the time.

The primary endpoint was the target lesion failure rate at 1-year of follow-up. Target lesion failure was a composite comprising cardiac death, target vessel MI, and clinically driven target vessel revascularization. The rate was 6.1% in the systematic two-stent group and 11.4% with provisional stenting, for a highly significant 48% relative risk reduction. The difference was driven largely by the systematic two-stent group’s lower rates of target vessel MI – 3.0% versus 7.1% with provisional stenting – and target lesion revascularization, with rates of 2.4% and 5.5%, respectively.

“The underlying mechanisms for the increased target vessel MI rate after the provisional stenting technique are unclear, and further study is urgently warranted,” Dr. Chen said.

There were no significant between-group differences in all-cause mortality or cardiac death, although both endpoints were numerically less frequent in the two-stent group.

The primary safety outcome was the 12-month rate of definite or probable stent thrombosis. This occurred in 1.2% of the systematic two-stent group and 2.5% of the provisional stent patients, a nonsignificant difference.

Bruce Jancin/MDedge News

Discussant Davide Capodanno, MD, PhD, declared the DEFINITE II trial to be “another success for this DK crush technique everyone is talking about recently.”

He noted that, in a recent meta-analysis of 21 randomized, controlled trials including 5,711 patients with bifurcation lesions treated using five different percutaneous coronary intervention techniques, DK crush stood out from the pack. Particularly impressive was the finding that the target lesion revascularization rate in patients treated using the DK crush technique was 64% lower than with provisional stenting (JACC Cardiovasc Interv. 2020 Jun 22;13[12]:1432-44).

Dr. Capodanno said that, although the DEFINITE II results were strongly positive in favor of the systematic two-stent approach and DK crush technique, he’s not convinced of the generalizability of the study results.

“These investigators are very expert in this technique. They invented it. They’ve been using it for 10 years. So of course you may expect excellent results when you have masters of this technique,” observed Dr. Capodanno, a cardiologist at the University of Catania (Italy).

Independent replication of the DEFINITE II findings is needed. Fortunately, two ongoing randomized trials are addressing the issue of how to best treat bifurcation lesions. The EBC-MAIN trial is comparing the provisional approach with the systematic two-stent strategy in patients with left main bifurcation lesions; the study will include the DK crush as well as culotte and TAP PCI techniques, with a primary endpoint consisting of the 12-month rate of death, MI, and target lesion revascularization. And the BBK-3 trial will compare systematic two-stent strategies pitting the culotte against the DK crush, with the primary endpoint being the 9-month rate of angiographic restenosis by quantitative coronary angiography.

“After these trials are complete, we’ll probably know much more about the tailoring of bifurcation techniques for particular patients,” according to Dr. Capodanno.

Simultaneous with Dr. Chen’s presentation, the results of the DEFINITION II trial were published online (Eur Heart J. 2020 Jun 26.doi: 10.1093/eurheartj/ehaa543).

Dr. Chen and Dr. Capodanno reported having no financial conflicts of interest regarding the study, which was funded mainly by the National Science Foundation of China.

[email protected]

A systematic two-stent approach to complex coronary bifurcation lesions led to significantly improved clinical outcomes at 1 year, compared with the long-popular provisional stenting technique, in the first randomized trial to prospectively validate a standardized definition of what constitutes a complex bifurcation.

Since the double-kissing (DK) crush technique was employed in 78% of the systematic two-stent procedures, and the two-stent approach provided superior outcomes, it’s reasonable to infer that the DK crush is the preferred technique in patients with truly complex coronary bifurcation lesions (CBLs), Shao-Liang Chen, MD, reported at the virtual annual meeting of the European Association of Percutaneous Cardiovascular Interventions.

He presented the results of the DEFINITION II trial, a multinational trial in which 653 patients at 49 medical centers who fulfilled the criteria for complex CBLs were randomized to a systematic two-stent approach or provisional stenting, with a second stent deployed by interventionalists as needed. Dr. Chen, director of the cardiology department and deputy president of Nanjing (China) Medical University, and coworkers had previously published their standardized criteria for CBLs (JACC Cardiovasc Interv. 2014 Nov;7[11]:1266-76), which they developed by analysis of a large bifurcation cohort; however, until the DEFINITION II trial, the criteria had never been used in a prospective randomized trial.

According to the standardized definition developed by Dr. Chen and associates, complex coronary bifurcation lesions must meet one major and two minor criteria.

Major criteria:

• A side branch lesion length of at least 10 mm with a diameter stenosis of 70% or more for distal left main bifurcation lesions.
• For non–left main bifurcation lesions, a side branch diameter stenosis of at least 90% along with a side branch lesion length of at least 10 mm.

Minor criteria:

• Moderate to severe calcification multiple lesions
• Bifurcation angle of <45 degrees or >70 degrees
• Thrombus-containing lesions
• Main vessel residual diameter <2.5 mm
• Main vessel lesion length of at least 25 mm

Interventionalists were strongly encouraged to utilize the DK crush or culotte stenting techniques in patients randomized to the systematic two-stent approach. In contrast, in the provisional stenting group, where 23% of patients received a second stent, that stent was placed using the T and small protrusion technique 64% of the time.

The primary endpoint was the target lesion failure rate at 1-year of follow-up. Target lesion failure was a composite comprising cardiac death, target vessel MI, and clinically driven target vessel revascularization. The rate was 6.1% in the systematic two-stent group and 11.4% with provisional stenting, for a highly significant 48% relative risk reduction. The difference was driven largely by the systematic two-stent group’s lower rates of target vessel MI – 3.0% versus 7.1% with provisional stenting – and target lesion revascularization, with rates of 2.4% and 5.5%, respectively.

“The underlying mechanisms for the increased target vessel MI rate after the provisional stenting technique are unclear, and further study is urgently warranted,” Dr. Chen said.

There were no significant between-group differences in all-cause mortality or cardiac death, although both endpoints were numerically less frequent in the two-stent group.

The primary safety outcome was the 12-month rate of definite or probable stent thrombosis. This occurred in 1.2% of the systematic two-stent group and 2.5% of the provisional stent patients, a nonsignificant difference.

Bruce Jancin/MDedge News

Discussant Davide Capodanno, MD, PhD, declared the DEFINITE II trial to be “another success for this DK crush technique everyone is talking about recently.”

He noted that, in a recent meta-analysis of 21 randomized, controlled trials including 5,711 patients with bifurcation lesions treated using five different percutaneous coronary intervention techniques, DK crush stood out from the pack. Particularly impressive was the finding that the target lesion revascularization rate in patients treated using the DK crush technique was 64% lower than with provisional stenting (JACC Cardiovasc Interv. 2020 Jun 22;13[12]:1432-44).

Dr. Capodanno said that, although the DEFINITE II results were strongly positive in favor of the systematic two-stent approach and DK crush technique, he’s not convinced of the generalizability of the study results.

“These investigators are very expert in this technique. They invented it. They’ve been using it for 10 years. So of course you may expect excellent results when you have masters of this technique,” observed Dr. Capodanno, a cardiologist at the University of Catania (Italy).

Independent replication of the DEFINITE II findings is needed. Fortunately, two ongoing randomized trials are addressing the issue of how to best treat bifurcation lesions. The EBC-MAIN trial is comparing the provisional approach with the systematic two-stent strategy in patients with left main bifurcation lesions; the study will include the DK crush as well as culotte and TAP PCI techniques, with a primary endpoint consisting of the 12-month rate of death, MI, and target lesion revascularization. And the BBK-3 trial will compare systematic two-stent strategies pitting the culotte against the DK crush, with the primary endpoint being the 9-month rate of angiographic restenosis by quantitative coronary angiography.

“After these trials are complete, we’ll probably know much more about the tailoring of bifurcation techniques for particular patients,” according to Dr. Capodanno.

Simultaneous with Dr. Chen’s presentation, the results of the DEFINITION II trial were published online (Eur Heart J. 2020 Jun 26.doi: 10.1093/eurheartj/ehaa543).

Dr. Chen and Dr. Capodanno reported having no financial conflicts of interest regarding the study, which was funded mainly by the National Science Foundation of China.

[email protected]

A systematic two-stent approach to complex coronary bifurcation lesions led to significantly improved clinical outcomes at 1 year, compared with the long-popular provisional stenting technique, in the first randomized trial to prospectively validate a standardized definition of what constitutes a complex bifurcation.

Since the double-kissing (DK) crush technique was employed in 78% of the systematic two-stent procedures, and the two-stent approach provided superior outcomes, it’s reasonable to infer that the DK crush is the preferred technique in patients with truly complex coronary bifurcation lesions (CBLs), Shao-Liang Chen, MD, reported at the virtual annual meeting of the European Association of Percutaneous Cardiovascular Interventions.

He presented the results of the DEFINITION II trial, a multinational trial in which 653 patients at 49 medical centers who fulfilled the criteria for complex CBLs were randomized to a systematic two-stent approach or provisional stenting, with a second stent deployed by interventionalists as needed. Dr. Chen, director of the cardiology department and deputy president of Nanjing (China) Medical University, and coworkers had previously published their standardized criteria for CBLs (JACC Cardiovasc Interv. 2014 Nov;7[11]:1266-76), which they developed by analysis of a large bifurcation cohort; however, until the DEFINITION II trial, the criteria had never been used in a prospective randomized trial.

According to the standardized definition developed by Dr. Chen and associates, complex coronary bifurcation lesions must meet one major and two minor criteria.

Major criteria:

• A side branch lesion length of at least 10 mm with a diameter stenosis of 70% or more for distal left main bifurcation lesions.
• For non–left main bifurcation lesions, a side branch diameter stenosis of at least 90% along with a side branch lesion length of at least 10 mm.

Minor criteria:

• Moderate to severe calcification multiple lesions
• Bifurcation angle of <45 degrees or >70 degrees
• Thrombus-containing lesions
• Main vessel residual diameter <2.5 mm
• Main vessel lesion length of at least 25 mm

Interventionalists were strongly encouraged to utilize the DK crush or culotte stenting techniques in patients randomized to the systematic two-stent approach. In contrast, in the provisional stenting group, where 23% of patients received a second stent, that stent was placed using the T and small protrusion technique 64% of the time.

The primary endpoint was the target lesion failure rate at 1-year of follow-up. Target lesion failure was a composite comprising cardiac death, target vessel MI, and clinically driven target vessel revascularization. The rate was 6.1% in the systematic two-stent group and 11.4% with provisional stenting, for a highly significant 48% relative risk reduction. The difference was driven largely by the systematic two-stent group’s lower rates of target vessel MI – 3.0% versus 7.1% with provisional stenting – and target lesion revascularization, with rates of 2.4% and 5.5%, respectively.

“The underlying mechanisms for the increased target vessel MI rate after the provisional stenting technique are unclear, and further study is urgently warranted,” Dr. Chen said.

There were no significant between-group differences in all-cause mortality or cardiac death, although both endpoints were numerically less frequent in the two-stent group.

The primary safety outcome was the 12-month rate of definite or probable stent thrombosis. This occurred in 1.2% of the systematic two-stent group and 2.5% of the provisional stent patients, a nonsignificant difference.

Bruce Jancin/MDedge News

Discussant Davide Capodanno, MD, PhD, declared the DEFINITE II trial to be “another success for this DK crush technique everyone is talking about recently.”

He noted that, in a recent meta-analysis of 21 randomized, controlled trials including 5,711 patients with bifurcation lesions treated using five different percutaneous coronary intervention techniques, DK crush stood out from the pack. Particularly impressive was the finding that the target lesion revascularization rate in patients treated using the DK crush technique was 64% lower than with provisional stenting (JACC Cardiovasc Interv. 2020 Jun 22;13[12]:1432-44).

Dr. Capodanno said that, although the DEFINITE II results were strongly positive in favor of the systematic two-stent approach and DK crush technique, he’s not convinced of the generalizability of the study results.

“These investigators are very expert in this technique. They invented it. They’ve been using it for 10 years. So of course you may expect excellent results when you have masters of this technique,” observed Dr. Capodanno, a cardiologist at the University of Catania (Italy).

Independent replication of the DEFINITE II findings is needed. Fortunately, two ongoing randomized trials are addressing the issue of how to best treat bifurcation lesions. The EBC-MAIN trial is comparing the provisional approach with the systematic two-stent strategy in patients with left main bifurcation lesions; the study will include the DK crush as well as culotte and TAP PCI techniques, with a primary endpoint consisting of the 12-month rate of death, MI, and target lesion revascularization. And the BBK-3 trial will compare systematic two-stent strategies pitting the culotte against the DK crush, with the primary endpoint being the 9-month rate of angiographic restenosis by quantitative coronary angiography.

“After these trials are complete, we’ll probably know much more about the tailoring of bifurcation techniques for particular patients,” according to Dr. Capodanno.

Simultaneous with Dr. Chen’s presentation, the results of the DEFINITION II trial were published online (Eur Heart J. 2020 Jun 26.doi: 10.1093/eurheartj/ehaa543).

Dr. Chen and Dr. Capodanno reported having no financial conflicts of interest regarding the study, which was funded mainly by the National Science Foundation of China.

[email protected]