title: [Incidence of conduction disorders in patients who underwent surgery for hypertrophic obstructive cardiomyopathy].
abstract: Thirteen non-consecutive patients, aging 7 to 61 (average 27) years, underwent left ventricular myotomy-myectomy for a severely symptomatic idiopathic hypertrophic subaortic stenosis (IHSS). In all patients the resting ECG before surgery showed P-R less than 0.18 sec, QRS duration less than 0.11 sec, QRS axis ranging from +10 to +80 degrees. In the immediate post-surgical period 3 patients has complete heart block and 1 had 2nd degree type 2 atrio ventricular block. Lesion was infra-Hisian in 3 patients and intra-Hisian in 1 patient. In the remaining 9 patients an immediate post-surgical left bundle branch block appeared; in 3 out of these patients ECG and an electrophysiologic study documented severe infra-Hisian conduction impairments after an average period of 4 years from surgery. During follow-up 3 patients died suddenly.
authors.forename: B
authors.initials: B
authors.lastname: Martini
authors.forename: G F
authors.initials: GF
authors.lastname: Buja
authors.forename: L
authors.initials: L
authors.lastname: Bassan
authors.forename: P
authors.initials: P
authors.lastname: Rizzardo
authors.forename: B
authors.initials: B
authors.lastname: Canciani
authors.forename: A
authors.initials: A
authors.lastname: Nava
mesh_terms: D000293:Adolescent; D000328:Adult; D002312:Cardiomyopathy, Hypertrophic / Q000601:surgery*; D002648:Child; D004562:Electrocardiography; D005260:Female; D006327:Heart Block / Q000175:diagnosis / Q000209:etiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000209:etiology*
vernacular_title: Incidenza di disturbi di conduzione in pazienti operati per miocardiopatia ipertrofico-ostruttiva.