Intraoperative transoesophageal echocardiography for paediatric cardiac surgery--an audit of 200 cases.

We report out initial experience with intraoperative transoesophageal echocardiography (TOE) in 200 patients undergoing repair of congenital heart disease. Complications associated with probe insertion precluded a full study in 11 patients (5.5%) and included airway obstruction (n = 6), inability to pass the probe (n = 4) and vascular compression (n = 1). The preoperative diagnosis was confirmed by TOE in 176 of 189 cases (93%) with minor variances in 12 (6.3%) and one major variance (additional large muscular ventricular septal defect (VSD)). Unexpected abnormalities not diagnosed preoperatively were found at surgery in four cases (2%) and were all of trivial operative significance. Postoperative studies showed no residual defect in 96 (51%) and trivial or mild residual defects in 72 patients (38%). There were moderate or severe residual defects in 21 cases (11%). Ten cases (5.3%) returned to bypass for further surgery, with eight achieving complete or adequate amelioration. In six of the 10 cases, return to bypass was prompted by the TOE examination alone. There was one re-operation in the postoperative period for a VSD patch dehiscence. Routine TOE offers significant advantages in the management of patients undergoing repair of congenital heart disease, particularly in postoperative assessment. Careful monitoring of perfusion and ventilation is required, particularly during probe insertion in children weighing 5 kg or less.