News
The Food and Drug Administration has given Edwards Lifesciences the green light to start a clinical trial on the SAPIEN 3 transcatheter aortic heart valve, which is a more advanced and improved version of the currently available SAPIEN valve.
"This is very exciting news," said Dr. Augusto Pichard, director of cardiac intervention and structural heart disease at MedStar Heart Institute in Washington, D.C. "One of the major concerns we have is vascular access. The current FDA-approved [SAPIEN] valve is large and sometimes doesn’t fit, or produces serious vascular complications," Dr. Pichard said in an interview. "The new valve has much smaller delivery size, making it very likely that many more patients would benefit from the procedure."
SAPIEN 3 also has a fabric cuff to reduce paravalvular leak, which is one of the major determinants of the procedure's long-term outcomes.
Courtesy of Edwards Lifesciences
The SAPIEN 3 transcatheter aortic heart valve
Under FDA’s conditional Investigational Device Exemption (IDE), Edwards will enroll up to 500 high-risk or inoperable patients with severe symptomatic aortic stenosis. The valve can be placed through transfemoral, transapical, or transaortic approach, and patients will be followed up for 1 year.
In the United States, the SAPIEN valve has been the first and only approved transcatheter aortic valve for transcatheter aortic valve replacement (TAVR), and several clinical trials by Medtronic are underway. But the valve technology has been moving forward elsewhere.
"The U.S. has lagged behind the rest of the world in access to new TAVR technology," Dr. John Carroll, a member of the STS/ACC TVT Registry Steering Committee and director of interventional cardiology and professor of medicine at the University of Colorado Hospital, Aurora, said in an interview. "This IDE being launched potentially allows us to start the process, bringing better and safer technologies to our patients."
Dr. John Carroll
Although the indications for SAPIEN 3 are the same as the currently used SAPIEN valve, experts say that the smaller SAPIEN 3 would benefit more patients.
"It’s been frustrating not to be able to treat many patients," said Dr. Carroll. "In TVT registry, we’ve gathered data on the initial U.S. experiences, with over 7,000 patients, and we certainly see a need for technology improvement, both smaller deliver systems and trying to eliminate paravalvular leak."
Edwards noted that the SAPIEN 3 valve is still an investigational device and is not commercially available in any country, but results from initial trials have been promising.
Dr. Pichard and Dr. Carroll said that they have observed the SAPIEN 3 placement on several occasions – overseas or via live case transmissions. They said the procedure for SAPIEN 3 is similar to the SAPIEN valve, and it appears to be easier.
Both cardiologists have been involved in Edwards’ PARTNER trials and said that they expected the patient enrollment to be rapid. They were not sure if Edwards will include their hospitals in the trial. After 1-year follow-up of the patients, the company will give the data to the FDA for a final decision.
The IDE is one of the key hurdles to initiating a clinical trial, which can potentially lead to FDA approval and commercial release. The process, if all goes as expected, could take at least 2 years.
Dr. Carroll said that he had no disclosures other than being involved in the PARTNER trial. Dr. Pichard has received honoraria from Edwards Lifesciences as a proctor for percutaneous aortic valves.
On Twitter @NaseemSMiller