title: Aspects of pre-excitation and its elucidation by His bundle electrograms.
mesh_terms: D000368:Aged; D001282:Atrial Flutter / Q000175:diagnosis / Q000503:physiopathology; D004562:Electrocardiography; D006327:Heart Block / Q000175:diagnosis*; D006329:Heart Conduction System / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D013577:Syndrome; D013610:Tachycardia / Q000175:diagnosis; D013614:Tachycardia, Paroxysmal / Q000503:physiopathology; D014927:Wolff-Parkinson-White Syndrome / Q000175:diagnosis / Q000503:physiopathology