Stopping the risk of a stroke.

To prevent blood clots. A fib can cause blood clots.

You can get an ablation to stop a fib or perhaps a cardioversion

Because it renders such a rhythm far less dangerous without the risks of long term oral anticoagulation.

The Watchman device is designed to protect against the formation of blood clots in the left atrial appendage. The issue of atrial fibrillation would be addressed through medication, cardiac ablation, or both.