The WATCHMAN device is a parachute-shaped self-expanding device permanently implanted in the LAA sealing it off. It prevents blood clots in the LAA from entering the bloodstream. It is made of materials that are common to many medical devices, is about the size of a quarter, and it cannot be seen outside the body.
WATCHMAN®
The WATCHMAN Implant is a one-time, minimally invasive procedure for people with atrial fibrillation not caused by a heart valve problem (also known as non-valvular AFib) who need an alternative to blood thinners.