title: Ventricular parasystolic rhythm masquerading as bilateral bundle branch block.
mesh_terms: D000368:Aged; D001145:Arrhythmias, Cardiac / Q000175:diagnosis* / Q000628:therapy; D002037:Bundle-Branch Block / Q000175:diagnosis*; D003937:Diagnosis, Differential; D004562:Electrocardiography; D005260:Female; D006329:Heart Conduction System / Q000503:physiopathology; D006334:Heart Function Tests; D006801:Humans; D010138:Pacemaker, Artificial; D013575:Syncope / Q000209:etiology