Abstract
Closure of muscular ventricular septal defects (VSDs) through the right atriotomy or right ventriculotomy may be difficult. These VSDs are often located behind the hypertrophied trabeculae carnae or papillary muscle. Residual or recurrent VSD may result from the difficult approach. Between March 1971 and December 1975, we have used the left ventriculotomy near the apex for closure of muscular VSDs in ten children. The patients' ages ranged from five months to eight years and three months. The diagnosis was established by cardiac catheterisation and left ventricular angiocardiogram in all patients. Six patients had multiple VSDs; in four patients VSD in the muscular septum was present (three apical, one midseptal). Operations were performed on cardiopulmonary bypass with moderate hypothermia and intermittent anoxic arrest. VSDs in the membranous septum were closed through the right atrium. Muscular VSDs were approached through a small vertical incision in the left ventricle near the apex. The postoperative course was uneventful in eight patients. Two patients, aged 16 months and eight years, died; histology showed grade IV pulmonary vascular disease in both. All survivors are well four months to five years after the operation, without clinical evidence of residual or recurrent VSD.
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