Surgical repair of postoperative left sinus of Valsalva aneurysm dissecting into the interventricular septum.

We describe the dissection of the interventricular septum by unruptured aneurysm of the left sinus of Valsalva in a patient who had undergone aortic valve replacement for rheumatic aortic valve insufficiency 5 years previously. The patient had worn a permanent pacemaker for 1 year to manage complete atrioventricular block. Sufficient information was provided by echocardiography and aortography to confirm the diagnosis. Operative correction consisted of obliteration of the aneurysm sac and closure of the outward orifice with a Dacron patch from the side of the aortic sinus.