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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.
Division of the CardioVascular Institute
Beth Israel Deaconess Medical Center
Lowry Medical Office Building, 2A
110 Francis Street
Boston, MA 02215
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330 Brookline Avenue, Boston, MA 02215
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