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The Experimental Duplication of Atrial Flutter in Dogs and Man by Coronary Sinus Pacing.

Kenneth M. Rosen, M.D.; Sun H. Lau, M.D.; and Anthony N. Damato, M.D.
Ann Intern Med. 1969;70(5):1080-1081. doi:10.7326/0003-4819-70-5-1080_3
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We have noted a close similarity between the P wave vectors in spontaneous coronary sinus rhythm, left atrial rhythm, and the common type of atrial flutter, the P vector being directed cephalad and to the right. Electrical simulation of the coronary sinus and left atrium produced similar P vectors at both slow and fast rates. An arrhythmia, with all the electrocardiographic characteristics of atrial flutter, has been reproduced by rapid electrical stimulation of the coronary sinus and left atrium. In five subjects and five closed-chested dogs the coronary sinus was stimulated at rates of 250 to 350/min, using a bipolar


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