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contentuptodate· Content· item f17_13_17619

©2013 UpToDate ® Print Email Atrial flutter Atrial flutter (at an atrial rate of approximately 240 beats/min) with a variable degree of atrioventricular block. The typical flutter (F) waves have a uniform, sawtooth appearance and occur at regular intervals which distinguish them from irregular fibrillatory waves in atrial fibrillation. Courtesy of Ary Goldberger, MD.