title: Syncope and aortic stenosis: significance of conduction abnormalities.
abstract: 22 patients with syncope and significant aortic stenosis underwent electrophysiological evaluation in addition to the hemodynamic study. Abnormalities of impulse formation or conduction were present in 12 patients. 6 patients demonstrated HV times greater than or equal to 55 msec. There was no correlation between the aortic valve gradient and the HV interval, between the enddiastolic volume of the ventricle and the HV time and between aortic valve calcification and the HV time. Syncopal attacks were corrected with aortic valve replacement even in patients with prolonged HV times.
mesh_terms: D000328:Adult; D000368:Aged; D001021:Aortic Valve / Q000503:physiopathology; D001024:Aortic Valve Stenosis / Q000503:physiopathology* / Q000628:therapy; D002036:Bundle of His / Q000503:physiopathology; D002037:Bundle-Branch Block / Q000503:physiopathology; D002114:Calcinosis / Q000503:physiopathology; D004077:Digoxin / Q000627:therapeutic use; D004562:Electrocardiography; D005260:Female; D006329:Heart Conduction System / Q000187:drug effects / Q000503:physiopathology*; D006350:Heart Valve Prosthesis; D006439:Hemodynamics / Q000187:drug effects; D006801:Humans; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial; D012008:Recurrence; D013575:Syncope / Q000503:physiopathology* / Q000628:therapy
chemical_list: D004077:Digoxin