Drugs that stimulate the heart can contribute to the development of atrial fibrillation. Atrial fibrillation can be caused by sleep apnea a condition where patients stop breathing for prolonged periods of time while sleeping. Treatment for sleep apnea can eliminate atrial fibrillation in some patients. When this occurs in people under age 60 to 65 it is called lone atrial fibrillation. In some cases chest pain is due to the rapid heart rate itself or perhaps due to stretching of the heart's chambers. A stroke can occur if a blood clot forms in the left atrium because of sluggish blood flow and a piece of the clot (called an embolus) breaks off. The embolus may also travel to the eye TEENneys spine or important arteries of the arms or legs. Urgent cardioversion is usually performed if AF is interfering with heart's ability to supply blood and oxygen to vital organs. AF can undergo electrical or medical cardioversion (using an antiarrhythmic drug) immediately. The device allows the physician to see the left atria looking for evidence of clots or slowed blood flow.
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