Aorto-cavitary fistula: a complication of infective endocarditis.

Aorto-cavitary fistulae are rare complications of infective endocarditis. The diagnosis, in the absence of concomitant aortic valve disease, replacement of aortic valve with homograft or prosthetic valve, periannular abscess and negative blood culture, requires a high index of suspicion and has important prognostic and management significance. The sensitivity of the Modified Duke Criteria is challenged in this case report with a documented right sinus of valsalva fistula to the right ventricle seen on transthoracic echocardiography.