Ruptured aneurysms of the sinus of Valsalva in Oriental patients.

Between 1964 and 1987, a total of 57 cases of ruptured aneurysm of the sinus of Valsalva underwent surgical correction at the National Taiwan University Hospital. This represents 0.96% of all cardiac operations. The origin of ruptured aneurysm of the sinus of Valsalva was the right coronary sinus in 46, the noncoronary sinus in nine, and the left coronary sinus in two. The aneurysms ruptured into the right ventricle in 44, into the right atrium in 11, into the left ventricle in one, and into both the right ventricle and right atrium in one. Associated congenital cardiac anomalies included ventricular septal defect in 30 patients, aortic regurgitation in 20, and infundibular pulmonic stenosis and coarctation of the aorta in one each. Operative death occurred in two patients (3.5%) and one patient had a successful reoperation. The remainder did well following surgery. To compare the differences between Oriental and Western countries in ruptured aneurysm of the sinus of Valsalva, 361 cases (195 Oriental patients versus 166 Western) were collected from the literature. Analyses of these cases revealed that ruptured aneurysm of the sinus of Valsalva in Oriental patients compared with Western series is characterized by a higher incidence (5 times), more aneurysms originating from the right coronary sinus (87.9% versus 63.6%), more aneurysm rupturing into the right ventricle (84.2% versus 56.6%), a higher incidence of association with ventricular septal defect (mainly supracristal) (59.0% versus 34.6%), less incidence of association with other congenital cardiac abnormalities (4.1% versus 21.5%), very few instances of rupturing into cardiac chambers other than the right ventricle and right atrium, and less incidence of occurrence in the extremities of ages (the youngest was 7 years in Oriental patients versus 11 months in the Western series). In other words, ruptured aneurysm of the sinus of Valsalva in Oriental patients is more or less a simple and uniform disease entity in contrast to the more diverse and protean pathologic profiles encountered in Western series. However, both Oriental patient and Western patient series have similar incidences of combination with aortic regurgitation (24.6% versus 20.0%), with 40.4% of Oriental patients and 60.6% of Western patients presenting with intact ventricular septum. Therefore the pathogenetic mechanisms of ruptured aneurysm of the sinus of Valsalva may at the same time contribute to the development of aortic regurgitation.