Causes and Risk Factors

What are the causes and risk factors of atrial fibrillation?

Atrial fibrillation is caused by an abnormality in your heart's electrical system. The underlying cause of atrial fibrillation varies from person to person. The abnormal electrical signals can result from:

  • Aging
  • Coronary artery disease (CAD)
  • High blood pressure
  • Heart valve disease
  • Heart failure
  • Congenital heart problems (present from birth)
  • Sleep apnea
  • Drinking too much alcohol

Did You Know?

People with atrial fibrillation have a 5X greater risk of stroke.1