Atrial fibrillation cannot always be prevented. Medications such as verapamil or diltiazem can be used to control the heart rate once the condition is diagnosed.
Atrial fibrillation can lead to congestive heart failure. The abnormal atrial rhythm also increases a person's risk for blood clots. The clots can travel to the brain and cause a stroke.
Atrial fibrillation is not contagious and poses no risk to others.