This website is intended to provide patients and caregivers with some information about the WATCHMAN Implant. The WATCHMAN Implant is for people with atrial fibrillation not caused by a heart valve problem who need an alternative to blood thinners. The WATCHMAN Implant is about the size of a quarter and made from very light and compact materials commonly used in many other medical implants. It’s designed to permanently close it off and keep those blood clots from escaping. The WATCHMAN Implant fits right into your LAA. 1 That’s why closing off this part of the heart is an effective way to reduce stroke risk. In people with AFib not caused by a heart valve problem, more than 90% of stroke-causing clots that come from the heart are formed in the LAA. When a blood clot escapes from the LAA and travels to another part of the body, it can cut off the blood supply to the brain, causing a stroke. There, blood cells can stick together and form a clot. This can cause blood to pool in an area of the heart called the left atrial appendage, or LAA. To understand how the WATCHMAN Implant works, it helps to know more about the connection between atrial fibrillation and stroke.Ītrial fibrillation, or AFib, affects your heart’s ability to pump blood normally.
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