[A new surgical technique for treatments of left ventricular outflow tract obstructions. Report of a case and reexamination of our experience (author's transl)].

Aortic valvotomy, aortic valve replacement, resection of the subaortic membrane and aortic patch angioplasty do not always provide satisfactory relief of left ventricular outflow tract obstruction. From August 1975 through January 1977, 15 patients underwent creation of a left ventricular vent by means of a Dacron fabric conduit containing a heterograft valve going from the left ventricle to the supraceliac portion of the abdominal aorta (Cooley's point). All patients had valvular, subvalvular, supravalvular aortic stenosis, or combined defects. One patient had severe hemolytic anemia following aortic valve replacement. Eleven of our 15 patients had undergone one or more previous surgical procedures for relief of aortic stenosis. The operative mortality has been one patient. At postoperative catheterization, there was a normalization of pressure gradients, and the blood flow through the conduit was 40% of the cardiac output. An interesting case of supravalvular aortic stenosis associated with stenosis of the vessels of the arch is presented.