Nav: Home

Results from the PARTNER I FIVE YEAR ECHO study presented at TCT 2016

November 01, 2016

WASHINGTON - November 2, 2016 - A substudy of the PARTNER I Trial and Continued Access Registry found that hemodynamic trends in patients who received transcatheter aortic valve replacement (TAVR) showed excellent durability without significant structural valve deterioration at five years. The trial represents the largest to-date longitudinal analysis of echocardiographic hemodynamic parameters systematically assessed by a core laboratory.

Findings were reported today at the 28th annual Transcatheter Cardiovascular Therapeutics (TCT) scientific symposium. Sponsored by the Cardiovascular Research Foundation (CRF), TCT is the world's premier educational meeting specializing in interventional cardiovascular medicine.

"TAVR is a safe and effective treatment for severe aortic stenosis," said lead investigator Pamela S. Douglas, MD. Dr. Douglas is the Ursula Geller Professor of Research in Cardiovascular Diseases at Duke University School of Medicine and Director of the Multimodality Imaging Program at the Duke Clinical Research Institute. "However, the long term durability of transcatheter heart valves and the potential implications for patient outcomes are not completely understood. Therefore, determining the midterm hemodynamic profiles is critical to patient and device selection."

The study's patient population included all successful TAVR procedures in PARTNER IA, IB and continued access trials using a first generation SAPIEN THV device. Echocardiograms were performed at intervals of seven days, 30 days, six months, and one, two, three, four and five years post implant and then analyzed by a single core laboratory. All echoes on all successful TAVRs (n=2,482; 282 patients at five years) were centrally assessed for mean aortic (AV) gradient, valve area and Doppler velocity index. Severely abnormal echo hemodynamic findings were also tabulated and reviewed.

The results show that the modeled trend of mean AV gradient decreased in the first few months post implant, and then increased non-significantly over follow up (12.1 vs. 9.2 at three months vs. 10.3 mmHg at 5 years; P=0.63). Among the 2,230 patients with multiple post-op AV gradients, a large interval change between subsequent echoes was uncommon, with just 10 patients (0.45%) having an interval increase of ³20 mmHg.

"The five-year data from the largest, core-lab based study of TAVR to date showed stable AV mean gradients over the mid-term, with no suggestion of late structural deterioration," added Dr. Douglas. "Similarly, severely abnormal hemodynamics in individual patients which might be suggestive of valve thrombosis or stenosis were rare. Together, the results suggest that the low five-year survival observed in this cohort is not due to adverse hemodynamics."

The PARTNER I FIVE YEAR ECHO trial was funded by Edwards Lifesciences. Dr. Douglas disclosed a research grant from Edwards Lifesciences which supported the study.

The results of the PARTNER I FIVE YEAR ECHO trial will be presented on Tuesday, November 1 at 9:40 AM ET in the Main Arena (Ballroom, Level 3) in the Walter E. Washington Convention Center.
-end-
About CRF and TCT

The Cardiovascular Research Foundation (CRF) is a nonprofit research and educational organization dedicated to helping doctors improve survival and quality of life for people suffering from heart and vascular disease. For over 25 years, CRF has helped pioneer innovations in interventional cardiology and has educated doctors on the latest treatments for heart disease.

Transcatheter Cardiovascular Therapeutics (TCT) is the annual scientific symposium of CRF and the world's premier educational meeting specializing in interventional cardiovascular medicine. Now in its 28th year, TCT features major medical research breakthroughs and gathers leading researchers and clinicians from around the world to present and discuss the latest evidence-based research in the field.

For more information, visit http://www.crf.org and http://www.tctconference.com.

Cardiovascular Research Foundation

Related Research Articles:

More Research News and Research Current Events

Trending Science News

Current Coronavirus (COVID-19) News

Top Science Podcasts

We have hand picked the top science podcasts of 2020.
Now Playing: TED Radio Hour

Listen Again: The Power Of Spaces
How do spaces shape the human experience? In what ways do our rooms, homes, and buildings give us meaning and purpose? This hour, TED speakers explore the power of the spaces we make and inhabit. Guests include architect Michael Murphy, musician David Byrne, artist Es Devlin, and architect Siamak Hariri.
Now Playing: Science for the People

#576 Science Communication in Creative Places
When you think of science communication, you might think of TED talks or museum talks or video talks, or... people giving lectures. It's a lot of people talking. But there's more to sci comm than that. This week host Bethany Brookshire talks to three people who have looked at science communication in places you might not expect it. We'll speak with Mauna Dasari, a graduate student at Notre Dame, about making mammals into a March Madness match. We'll talk with Sarah Garner, director of the Pathologists Assistant Program at Tulane University School of Medicine, who takes pathology instruction out of...
Now Playing: Radiolab

What If?
There's plenty of speculation about what Donald Trump might do in the wake of the election. Would he dispute the results if he loses? Would he simply refuse to leave office, or even try to use the military to maintain control? Last summer, Rosa Brooks got together a team of experts and political operatives from both sides of the aisle to ask a slightly different question. Rather than arguing about whether he'd do those things, they dug into what exactly would happen if he did. Part war game part choose your own adventure, Rosa's Transition Integrity Project doesn't give us any predictions, and it isn't a referendum on Trump. Instead, it's a deeply illuminating stress test on our laws, our institutions, and on the commitment to democracy written into the constitution. This episode was reported by Bethel Habte, with help from Tracie Hunte, and produced by Bethel Habte. Jeremy Bloom provided original music. Support Radiolab by becoming a member today at Radiolab.org/donate.     You can read The Transition Integrity Project's report here.