Discrete subaortic stenosis: surgical experience at the King Fahd heart centre in Jeddah

Twenty-four consecutive patients with discrete subaortic stenosis were operated on over a Seven-year period [l983-1989]'at the King Fabad Heart Centre, Jeddah. Twenty patients [83.3%] had discrete subaortic membranes [type I] while 3 patients [16.6%] had fibromuscular tunnels [type II]. There were more adults than children] in our series, with a male predominance. Operation included resection of the subaortic membranes in 21 patients and left ventricular myectomy in 3 patients. There was a significant decrease in the intraoperative gradient measured post cardiopulmonary bypass. Six patients [27.2%] have recently presented with symptoms of recurrence, but none.has been reoperated upon. Operative mortality in this series was 4.5%