The WATCHMAN™, a left atrial appendage (LAA) closure device, offers patients with non-valvular atrial fibrillation (AFib) an alternative to taking warfarin therapy and the side-effects, such as bleeding, that come with the therapy. This procedure has also been shown to decrease a patient’s stroke risk by as much as 77 percent in clinical trials.
In a procedure that takes about an hour, the Watchman device is inserted into the heart via a catheter placed in a vein in the upper leg. Once in place, the wire and mesh device opens like an umbrella to block the LAA. At the Heart and Vascular Center, the procedure is performed in our state-of-the-art hybrid catherization lab. Patients typically spend one night in the hospital, and most are able to stop taking a blood thinner within 45 days, the time it takes for heart tissue to grow over the implant and create a permanent barrier to clot formation.
Watchman Device Expertise at Wake Forest Baptist
“We have seen a 66 percent increase in the number of AFib cases in the past 20 years,” Whalen said. “And a good number of those patients take warfarin also. This procedure provides patients an alternative to taking medications long-term to control their AFib. For patients who’s AFib is not well controlled or for patients who can’t take blood thinners, this is a significant step in helping them have a better quality of life.”
“When I talk to patients about AFib, we talk about improving their quality of life and their quantity of life,” Whalen said. “We want patients living longer. One important way to improve longevity is by stroke prevention."
Blood Thinners vs. the Watchman Device to Treat AFib
Blood thinners are the most commonly employed long-term stroke-prevention therapy for people with the most common form of AFib, and the most commonly prescribed blood thinner is warfarin (usually dispensed under trade name Coumadin). But warfarin has a number of drawbacks, including increased risk of serious bleeding, the need for regular monitoring, some dietary restrictions and negative interaction with numerous prescription and over-the-counter medicines. Plus, some people simply can’t tolerate blood thinners.
Rather than thinning the blood to prevent clots from forming, the Watchman closes off the LAA, a small pouch in the upper left chamber of the heart. Research indicates that about 20 percent of all ischemic (clot-related) strokes happen in people with AFib and that 90 percent of these can be traced to clots originating in the LAA.
About the Watchman Device
Manufactured by Boston Scientific Corp., the Watchman was approved by the federal Food and Drug Administration in March 2015. Available internationally since 2009, it has been used to treat more than 15,000 patients in over 50 countries.
In early February 2017, the Center for Medicare and Medicaid Services announced that Medicare would cover the cost of the Watchman device and the procedure to implant it in patients who meet certain criteria.