title: The sick sinus syndrome: its clinical features, His bundle electrograms, and myocardial biopsy.
mesh_terms: D000328:Adult; D000368:Aged; D002036:Bundle of His / Q000503:physiopathology*; D003326:Coronary Circulation; D003327:Coronary Disease / Q000150:complications; D005260:Female; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans; D006973:Hypertension / Q000150:complications; D008297:Male; D008875:Middle Aged; D009206:Myocardium / Q000473:pathology*; D012804:Sick Sinus Syndrome / Q000209:etiology / Q000473:pathology* / Q000503:physiopathology