Transesophageal echocardiography detection of undiagnosed multiple muscular ventricular septal defects with alteration of shunt flow by right ventricular pacing after an arterial switch operation in a neonate.
Tokyo Women's Medical University, Faculty of Medicine, Department of Anesthesiology, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, Japan 162-8666. satokuro@sea.plala.or.jp