• Centers and Departments
• Back to Cardiac Surgery
• Diseases and Conditions
• Aortic Disease
• Aortic Valve Disease
• Atrial Fibrillation
  • Signs and Symptoms
  • Risk Factors
  • Causes
  • Diagnosis
  • Treatments
  • Physicians and Services
• Coronary Artery Disease
• Mitral Valve Disease

Causes

Causes Not Completely Understood

It is not completely understood what causes AF.

It is thought that abnormalities or damages to the heart's structure are the most common causes. Although some people with AF have no heart defects or damage which is known as lone atrial fibrillation.