title: Complete AV block simulating 2:1 incomplete AV block: a possible case of 2:1 AV synchronization.
mesh_terms: D000368:Aged; D001285:Atropine / Q000494:pharmacology; D002037:Bundle-Branch Block / Q000503:physiopathology; D004562:Electrocardiography; D006327:Heart Block / Q000175:diagnosis / Q000503:physiopathology*; D006329:Heart Conduction System / Q000503:physiopathology; D006339:Heart Rate / Q000187:drug effects; D006801:Humans; D008297:Male
chemical_list: D001285:Atropine