The Wenckebach phenomenon in left bundle branch block.
D002037:Bundle-Branch Block / Q000503:physiopathology*; D003327:Coronary Disease / Q000150:complications; D003937:Diagnosis, Differential; D004562:Electrocardiography; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D013610:Tachycardia / Q000175:diagnosis; D013997:Time Factors