Surgical treatment of dissecting aneurysm of the interventricular septum.

Two extremely rare cases of dissecting aneurysm of the interventricular septum associated with aortic incompetence are reported. One was complicated with an aneurysm of the left coronary sinus of Valsalva, and the other may have been the result of trauma. Surgical operation involved resection or repair of the aneurysm and replacement of the aortic valve. Both patients recovered uneventfully. Early diagnosis and surgical intervention are emphasized.