title: Electrophysiologic abnormalities of the sinus node and atrium in patients with bundle branch block.
mesh_terms: D000368:Aged; D002037:Bundle-Branch Block / Q000503:physiopathology*; D003327:Coronary Disease / Q000503:physiopathology; D004594:Electrophysiology; D005260:Female; D006325:Heart Atria / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012032:Refractory Period, Electrophysiological; D012849:Sinoatrial Node / Q000503:physiopathology*; D013997:Time Factors