Bacterial endocarditis in a patient with idiopathic hypertrophic subaortic stenosis.

BACTERIAL ENDOCARDITIS generally has not been considered a threat to patients with isolated idiopathic hypertrophic subaortic stenosis (IHSS). Although there have been a very few reports of its occurrence in this disorder,1 2 these patients represent only a small fraction of those patients diagnosed as having this entity.3 A patient has recently been seen with bacterial endocarditis, who during subsequent hemodynamic and angiographic studies, was found to have IHSS. The rarity of this occurrence has prompted this report with a recommendation for prophylaxis for subacute bacterial endocarditis (SBE) in patients who have muscular subaortic stenosis.