Locations Main Campus: Chesterfield, MO 63017   |   Locations
314-434-1500 314-434-1500   |   Contact Us

Heart Care Services

How WATCHMAN Works

The WATCHMAN Implant is about the size of a quarter and made from very light and compact materials commonly used in many medical implants. WATCHMAN is a permanent implant that offers an alternative to the lifelong use of blood thinners. It's about the size of a quarter and made from very light and compact materials commonly used in many other medical implants.

WATCHMAN effectively reduces the risk of stroke by permanently closing off the LAA to keep blood clots from escaping. WATCHMAN can eliminate the bleeding risks and regular blood tests and food-and-drink restrictions that come with warfarin. In a clinical trial, 9 out of 10 people were able to stop taking warfarin just 45 days after the WATCHMAN procedure.

How is WATCHMAN Implanted?
WATCHMAN is implanted into your heart in a one-time procedure. To implant WATCHMAN, your doctor makes a small cut in your upper leg and inserts a narrow tube, as done in a standard stent procedure. Your doctor then guides WATCHMAN into your heart's LAA. The procedure is done under general anesthesia and takes about an hour. Patients commonly stay in the hospital overnight and leave the next day.

After the Procedure
Following the WATCHMAN procedure, you'll take warfarin for 45 days or until your LAA is permanently closed off. During this time, heart tissue will grow over the implant to form a barrier against blood clots. Your doctor will monitor this process by taking pictures of your heart to see when you can stop taking warfarin.

Your doctor will then prescribe a medicine called clopidogrel (also known as Plavix®) and aspirin for you to take for six months. After that, you'll continue to take aspirin on an ongoing basis. A very small number of patients may need to keep taking blood thinners long term.

In a clinical trial:
  • 92% of patients were able to stop taking warfarin just 45 days after the procedure6
  • 99% of patients were able to stop taking warfarin within 1 year after the procedure6
In a clinical trial, 9 out of 10 people were able to stop taking warfarin just 45 days after the WATCHMAN procedure.