Rupture of a congenital aneurysm of the sinüs of valsalva is a rare congenital cardiac malformation. Between 1985, and June 1997 at the Koşuyolu Heart and Research Hospital, we have operated 28 patients with ruptured sinus valsalva aneurysm. This represents 0.26 % of all open cardiac operations (28/10700). The major cause of them (67.8 %) found to be rupture of a congenital aortic sinus aneurysm, usually during the third or fourth decade of live. The origin of ruptured congenital sinüs valsalva aneurysm was the right coronary sinüs in 17 and the noncoronary sinüs in two cases. We have not seen any ruptured sinüs valsalva aneurysm which originated from left coronary sinüs. The aneurysms ruptured into the right ventricle in 13 patients, into the right atrium in five patients, and into left ventricle one patient. Venticular septal defect was the most common associated defect (6/19, 31.6 %). The patient ages ranged between 14 and 55 years (mean age 28.5). For the repair of ruptured sinüs valsalva aneurysm vve have opened aorta and the cavity into vvhich the aneurysm has ruptured. The aneurysmal sac was excised and the defect was closed with a patch. The hospital mortality rate was 5.2 % with one patient. Operative management of patients with ruptured congenital sinüs valsalva aneurysm is discussed.