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Atrial Fibrillations and Flutters

Atrial fibrillation (AF or Afib) is the most common type of irregular heartbeat. During atrial fibrillation, your heart's two small upper chambers (the atria) quiver instead of beating effectively. Blood isn't pumped completely out of them, so it may pool and clot.

If you are diagnosed with atrial fibrillation, you may have a significantly increased risk of stroke, which can be the result of a piece of a blood clot leaving the heart. If this clot becomes lodged in an artery in your brain it causes a stroke. About 15 percent of strokes occur in people with atrial fibrillation.

What are the symptoms of atrial fibrillation?

  • Symptoms of atrial fibrillation vary from person to person
  • A number of people have no symptoms
  • The most common symptom in people with intermittent atrial fibrillation is palpitations, a sensation of rapid or irregular heartbeat
  • Lightheadedness or faintness
  • Weakness, lack of energy or shortness of breath with effort, and chest pain