[Ventricular septal defect after operation in hypertrophic obstructive cardiomyopathy (author's transl)].

After surgical resection in idiopathic hypertrophic subaortic stenosis, a ventricular septal defect was observed in one patient at a later date. The defects was closed in a second operation. - The hemodynamically relevant changes in the vascular bed of the lung with preoperative congestion and postoperative shunt found their expression in discrete changes only of the chest x-ray.