What is atrial fibrillation and how is it treated?

Associated Press (AP)EN 4 min read 100% complete by By MIKE STOBBEFebruary 7, 2026 at 03:23 PM

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Atrial fibrillation (A-fib), an irregular heartbeat affecting millions of Americans, is becoming increasingly prevalent, particularly among older adults. A-fib can lead to serious complications like blood clots, stroke, and heart failure. The condition occurs when the heart's upper chambers beat out of sync with the lower chambers, sometimes causing symptoms like shortness of breath and a rapid heartbeat. Diagnosis is improving due to the use of smartwatches and other devices that can detect erratic heartbeats. While genetics can play a role, damage to the heart's upper chambers and electrical signaling are also contributing factors. Doctors are optimistic because treatments for A-fib are also improving.

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New York 40% University of Utah 50% United States 50% American Heart Association 60% T. Jared Bunch ×270% Daniel Moore ×380%

Keywords

atrial fibrillation 100% a-fib 90% irregular heartbeat 80% stroke 70% blood clots 70% heart failure 70% diagnosis 60% smartwatches 60% treatment 50% heart's upper chambers 50%