title: [Studies on second-degree atrioventricular block during atrial fibrillation].
abstract: 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.
authors.affiliation: Department of Internal Medicine, Norman Bethune University of Medical Sciences.
authors.forename: Y
authors.initials: Y
authors.lastname: Zhang
authors.forename: X
authors.initials: X
authors.lastname: Guo
mesh_terms: 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