Atrial fibrillation

ARTICLE SECTIONS

Introduction Signs and symptoms Causes Risk factors

Screening and diagnosis Complications Treatment Self-care

Introduction

Atrial fibrillation is increasingly common with advancing age. During atrial fibrillation, the heart's two upper chambers (the atria) beat chaotically and irregularly — out of coordination with the two lower chambers (the ventricles) of the heart. The result is an irregular and often rapid heart rate that causes poor blood flow to the body and symptoms of heart palpitations, shortness of breath and weakness. Most people with atrial fibrillation have an increased risk of developing blood clots that may lead to stroke.

Atrial fibrillation is a common heart rhythm problem. More than 2 million Americans have atrial fibrillation, which can cause palpitations, shortness of breath, fatigue and stroke.

Atrial fibrillation is often caused by changes in your heart that occur as a result of heart disease or high blood pressure. Episodes of atrial fibrillation can come and go, or you may have chronic atrial fibrillation.

Although atrial fibrillation usually isn't life-threatening, it can lead to complications. Treatments for atrial fibrillation may include medications and other interventions to try to alter the heart's electrical system.

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Signs and symptoms