Subaortic obstruction and complete atrioventricular block in Behçet's disease.

Left ventricular outflow tract obstruction may be dynamic, most commonly associated with hypertrophic cardiomyopathy, and, uncommonly, by congenital anomalies such as discrete subaortic stenosis. We describe a patient with Behçet's disease, presenting with a systolic murmur, fever, and syncope, in whom a diagnosis of subaortic obstruction caused by a pseudo-aneurysm dissecting the interventricular septum and associated with a complete atrioventricular block was made.