Mycotic aneurysm of the sinus of Valsalva due to Eikenella corrodens bacterial endocarditis.

A patient with a left sinus of Valsalva aneurysm secondary to bacterial endocarditis involving an unusual pathogen, Eikenella corrodens, is presented. This case and a review of previous reports on mycotic sinus of Valsalva aneurysm are analyzed. The distinctive M-mode and two-dimensional echocardiographic patterns of a sinus of Valsalva aneurysm as well as the usefulness and limitations of echocardiography in this condition are discussed. This rare complication of bacterial endocarditis can be diagnosed and clinically followed by serial echocardiographic studies, and its presence alone does not necessitate surgical intervention.