J.Jpn. Surg. Soc.. 81(9): 1010-1014, 1980
Report on the annual meeting
SYMPOSIUM “SURGERY AND ARRHYTHMIAS” 3. ARRHYTHMIAS AND CARDIAC SURGERY
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Department of Thoracic Surgery, Faculty of Medicine, University of Tokyo Akira Mizuno |
After surgical closure of secundum atrial septal defect, early postoperative arrhythmias were encountered in 85 cases (29.6%) out of 287 cases with no preoperative arrhythmias. The arrhythmias were persisted over 5 years after surgery in 28 cases (9.8%). Among them, 17 cases exhibited progressive bradyarrhythmias, and artificial pacemakers were implanted in two cases. Sinus node and atrioventricular functions were proved to be depressed in some cases.
Intraventricular conduction disturbances after surgical closure of ventricular septal defect were evaluated in patients with ventricular septal defect and tetralogy of Fallot, by means of surface electrocardiogram in long-term follow-up period (245 cases), postoperative electrophysiologic studies in 23 cases, and intraoperative epicardial mapping in 20 cases. Patients without conduction disturbances in the follow-up period were found in 59% in patients with ventricular septal defect, and in only 11% with tetralogy of Fallot. Right bundle branch block, including both proximal and distal pattern, was the commonest disturbances in these postoperative patients. Proximal block was found more prevalent in each investigation. Prognosis of bifascicular block was benign in 29 patients, while trifascicular block appeared in one case and sudden deaths occured in another two cases.
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