[A case of saccular aneurysm of the coronary artery]

A 42-year-old man with chest oppression was diagnosed as having a saccular aneurysm of the coronary artery by cardiac catheterization. At the time of operation on April 26, 1993, the aneurysm, measured 15 mm in diamer, and arose from the proximal segment of the first septal branch of the left anterior descending coronary artery. Several coronary arteriovenous fistulae from the aneurysm to the pulmonary artery were also noted. The stem of the aneurysm and the coronary arteriovenous fistulae were ligated and the aneurysm was resected. We considered the etiology to be mainly arteriosclerosis on the basis of the aneurysm pathology. And this aneurysm was also considered to have congenital factors because of the existence of arteriovenous fistulae. There were no symptoms after the operation and he was discharged at 24th postoperative day. Now he continues to do well.