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What Is Afib or Atrial Fibrillation?

What Is Afib or Atrial Fibrillation? (0:13)

Atrial Fibrillation, often referred to as Afib, is referenced constantly on medical dramas, but many people aren't sure what it is. HealthMaker Jeff Olgin, MD, a cardiologist at UCSF, explains what the heart issue is in this video.

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Afib is abnormal irregular heart rhythm originating in the top chambers of the heart, in the atria, and it's the leading cause of stroke, and can cause heart failure and symptoms.