Atrial fibrillation (AFib) is one of the most common heart rhythm disorders and a major cause of stroke. Many patients with AFib are prescribed blood-thinning medications to prevent clots — but for some people, long-term anticoagulation isn’t safe due to bleeding risk, lifestyle concerns, or other medical conditions.
At Saint Michael’s Medical Center, our structural heart team offers the WATCHMAN™ left atrial appendage closure procedure, a minimally invasive treatment that helps reduce stroke risk while allowing many patients to stop taking blood thinners long-term.
Why AFib Increases Stroke Risk
In atrial fibrillation, the heart’s upper chambers do not squeeze normally. Instead, blood can collect in a small pouch called the left atrial appendage (LAA).
More than 90% of stroke-causing clots in AFib patients form in this area.
If a clot leaves the heart and travels to the brain, it can cause a stroke.
Traditionally, blood thinners have been the primary way to prevent this — but they also increase the risk of serious bleeding.
The WATCHMAN device offers another option.
How the WATCHMAN Device Works
The WATCHMAN is a small, parachute-shaped implant about the size of a quarter.
It permanently seals the left atrial appendage so clots cannot escape into the bloodstream.
Instead of thinning the blood, the procedure removes the source of most clots.
Over time, heart tissue grows over the device, making it a natural part of the heart.
Watch Our Specialists Explain the Procedure
Who May Be a Candidate
You may be considered for the WATCHMAN procedure if you:
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Have non-valvular atrial fibrillation
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Are at increased risk for stroke
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Cannot safely take long-term blood thinners
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Have a history of bleeding complications
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Have an active lifestyle or fall risk where anticoagulation is dangerous
Your cardiologist will evaluate your stroke risk, bleeding risk, and overall health to determine if this treatment is appropriate.
What Happens During the Procedure
The WATCHMAN procedure is performed in the cardiac catheterization lab and typically takes about one hour.
- You receive general anesthesia so you are fully comfortable
- A small incision is made in the groin
- A catheter is guided through a vein into the heart using advanced imaging
- The device is placed in the left atrial appendage
- The catheter is removed and the incision is closed
No open-heart surgery is required.
Recovery and Aftercare
Most patients stay overnight for monitoring and go home the next day.
After the procedure:
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Light activity within 24–48 hours
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Avoid strenuous activity for about one week
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Temporary blood thinner use for several weeks
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Many patients stop blood thinners after about 45 days
Your cardiologist will confirm closure with follow-up imaging.
Benefits of the WATCHMAN Procedure
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Reduces stroke risk comparable to blood thinners
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Minimally invasive — no chest surgery
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Short recovery time
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Lower long-term bleeding risk
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Many patients can stop lifelong anticoagulation therapy
Advanced Structural Heart Care in Newark
The WATCHMAN procedure is part of Saint Michael’s Medical Center’s comprehensive heart program, which includes:
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Coronary angioplasty and stenting
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Peripheral vascular interventions
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TAVR (transcatheter valve replacement)
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Mitral valve therapies
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Complex catheter-based cardiac procedures
Our multidisciplinary team of interventional cardiologists, imaging specialists, and anesthesia providers work together to deliver advanced heart care close to home.
Schedule a Consultation
If you have atrial fibrillation and are concerned about stroke risk or blood thinners, our heart specialists can help determine the right treatment for you. Call (973) 877 – 5080 to schedule an appointment.
