Cardiac rhythm and conduction before and after Mustard's operation for complete transposition of the great arteries.

patients with transposition of the great arteries had a modification of Mustard's operation designed to avoid damage to the sinus and atrioventricular nodes. Of these, 88 had an atrial baffle alone from which nine hospital and four late deaths occurred (total mortality 14.8%); 32 had additional closure of ventricular septal defect and/or relief of left ventricular outflow tract obstruction from which six hospital and three late deaths occurred (28%).