Abstract
A subaortic membrane predisposes to bacterial endocarditis usually affecting the aortic valve and left ventricular outflow tract. Endocarditis involving the subaortic membrane itself has been described twice only; once at operation and once at postmortem. The case of a man with vegetations involving a subaortic membrane that were detected preoperatively and the echocardiographic appearances of these findings are reported.
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