Approximately 10.5 million Americans have atrial fibrillation (AFib), a condition that causes an irregular, often too fast, heartbeat. AFib increases the risk of stroke four to five times more than normal because it can cause blood to pool in the atria, or upper chambers of the heart. This allows clots to form, which can travel to the brain and cause a stroke.
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Medical Xpress - latest medical and health news stories title: Medical Xpress - medical research advances and health news