[Plastic enlargement of the left ventricular outflow tract. A new operative method (author's transl)].

A new operative technic for widening the stenotic left ventricular outflow ("left ventricular tunnel") is described and a clinical case is reported. A vertical incision along the anterior aspect of the aorta descends with a slight angle across the outflow tract of the right ventricle. After aortic valvectomy the ventricular septum is cut between the left and right coronary commissure through its full thickness and the incision extended inferiorly across the stenotic area. A dacron patch is sewn into the gap of the septum and aortotomy in order to widen the area of previous stenosis and prosthetic replacement of the aortic valve is performed. Finally another dacron patch is used to close the defect in the right ventricular outflow tract.