A 42-year-old woman with isolated right ventricular hypoplasia underwe
nt operation. To determine the optimal procedure, we temporarily occlu
ded the atrial septal defect with a balloon catheter that was introduc
ed through the right atrial appendage. The hemodynamics were stable th
roughout the occlusion test. Simple closure of the atrial septal defec
t was safely accomplished. Intraoperative occlusion test with the ball
oon catheter was a good alternative to preoperative occlusion test. (C
) 1998 by The Society of Thoracic Surgeons.