[Studies on second-degree atrioventricular block during atrial fibrillation].
The degree of AV block after cardioversion in 80 episodes of atrial fibrillation in 61 patients who suffered from atrial fibrillation associated with second-degree AV block was observed. Only in 34 of the 80 episodes the electrocardiogram showed first-degree AV block. The remaining 46 had normal AV conduction. No second-degree block was found. It demonstrates that second-degree AV block during atrial fibrillation is not identical with that in sinus rhythm.
Zhang
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Y
Department of Internal Medicine, Norman Bethune University of Medical Sciences.
Guo
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X
D000328:Adult; D001281:Atrial Fibrillation / Q000503:physiopathology* / Q000628:therapy; D004554:Electric Countershock; D004562:Electrocardiography; D005260:Female; D006327:Heart Block / Q000503:physiopathology*; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged