Mount Sinai’s Dr. Vivek Reddy Demonstrates Cost-Effectiveness of Watchman Device
The WATCHMAN™ Left Atrial Appendage Closure Device is more cost-effective than warfarin and non-warfarin oral anticoagulants (NOACs) for stroke reduction in patients with non-valvular atrial fibrillation, according to a study led by Vivek Reddy, MD, Director of Cardiac Arrhythmia Services for The Mount Sinai Hospital and the Mount Sinai Health System, and published online and in the December 22 issue of the Journal of American College of Cardiology (JACC), the world’s leading peer-reviewed journal on cardiovascular disease.
Atrial fibrillation, a heart rhythm malfunction that affects nearly six million Americans, puts patients at a significantly greater risk of stroke, which can be both debilitating and costly. With nearly $8 billion spent annually on atrial fibrillation-associated strokes, researchers aimed to determine the cost effectiveness of three atrial fibrillation treatments: warfarin, NOACs and the WATCHMAN device.
“By its very nature, the WATCHMAN device is not subject to patient adherence issues, since once implanted, the device provides lifelong stroke prophylaxis without the risk of complications associated with blood thinners,” said Dr. Reddy. “This is crucial both in improving patient outcomes by reducing disabling strokes, as well as reducing health care costs.”
Blood-thinning medications like warfarin and NOACs have long been the standard of care for reducing the risk for stroke in patients with atrial fibrillation; however, many patients cannot tolerate these medications because of the incidence of bleeding and need for bi-weekly blood tests. While these therapies have been demonstrated to be efficacious, their effectiveness is contingent upon patient adherence, as gaps in treatment can lead to stroke.
The WATCHMAN device, approved by the U.S. Food and Drug Administration in March 2015, is implanted into the heart to close off the left atrial appendage, a blind pouch of heart tissue where blood clots form and can then break off and travel in the bloodstream to the brain and cause strokes. It is inserted through a vein in the leg during a one-time, minimally invasive, catheter-based procedure in the Electrophysiology Laboratory.
Researchers used a Markov model constructed from the perspective of the Centers for Medicare & Medicaid Services (CMS) with a lifetime horizon defined as 20 years and 3-month cycle length to evaluate the cost effectiveness of the three treatment strategies. Cost effectiveness was assessed annually to determine if there was an observable time horizon over which treatment options reached accepted levels of cost effectiveness.
The researchers found:
- The WATCHMAN device achieved cost effectiveness relative to warfarin at seven years ($42,994/QALY) and NOACs achieved cost effectiveness relative to warfarin at 16 years ($48,446/QALY) when assessing Medicare beneficiaries over a 20-year period.
- The WATCHMAN device became dominant (more effective and less costly) to warfarin at 10 years and dominant to NOACs at five years, with cost savings generated annually thereafter.
The WATCHMAN device, made by Boston Scientific, is approved in more than 70 countries worldwide. Mount Sinai experts were the first to use the device in the eastern United States.
Dr. Reddy served as co-principal investigator for national clinical trials testing the WATCHMAN device, and has served as a consultant to Boston Scientific.
About the Mount Sinai Health System
The Mount Sinai Health System is New York City's largest integrated delivery system, encompassing eight hospitals, a leading medical school, and a vast network of ambulatory practices throughout the greater New York region. Mount Sinai's vision is to produce the safest care, the highest quality, the highest satisfaction, the best access and the best value of any health system in the nation. The Health System includes approximately 7,480 primary and specialty care physicians; 11 joint-venture ambulatory surgery centers; more than 410 ambulatory practices throughout the five boroughs of New York City, Westchester, Long Island, and Florida; and 31 affiliated community health centers. The Icahn School of Medicine is one of three medical schools that have earned distinction by multiple indicators: ranked in the top 20 by U.S. News & World Report's "Best Medical Schools", aligned with a U.S. News & World Report's "Honor Roll" Hospital, No. 12 in the nation for National Institutes of Health funding, and among the top 10 most innovative research institutions as ranked by the journal Nature in its Nature Innovation Index. This reflects a special level of excellence in education, clinical practice, and research. The Mount Sinai Hospital is ranked No. 14 on U.S. News & World Report's "Honor Roll" of top U.S. hospitals; it is one of the nation's top 20 hospitals in Cardiology/Heart Surgery, Diabetes/Endocrinology, Gastroenterology/GI Surgery, Geriatrics, Gynecology, Nephrology, Neurology/Neurosurgery, and Orthopedics in the 2019-2020 "Best Hospitals" issue. Mount Sinai's Kravis Children's Hospital also is ranked nationally in five out of ten pediatric specialties by U.S. News & World Report. The New York Eye and Ear Infirmary of Mount Sinai is ranked 12th nationally for Ophthalmology and the South Nassau Communities Hospital is ranked 35th nationally for Urology. Mount Sinai Beth Israel, Mount Sinai St. Luke's, Mount Sinai West, and South Nassau Communities Hospital are ranked regionally.