All issues > Volume 32(3); 1989

Original Article

J Korean Pediatr Soc. 1989;32(3):359-365. Published online March 31, 1989.

Studies on Type of Ventricular Septal Defect of Tetralogy of Fallot and its Clinical Significance.

Myung Kul Yum¹, Hee Shang Youn¹, Heung Jae Lee²

¹Department of Pediatrics, College of Medicine, Kyungsang National University, Jinju, Korea
²Department of Pediatrics, Sejong General Hospital, Pucheon, Korea

Received: August 16, 1988;  Accepted: September 26, 1988.

Abstract

To assess the VSD type of TOF and relationship between VSD type of TOF and pulmonary valve stenosis, small pulmonary valve annulus, and pulmonary artery anomaly, we analyzed 256 cases of surgically confirmed TOF patients. The summary of observation is as follows; 1) Four tytes of VSDs were found. The most frequent is perimembranous (PM) VSD of which incidence is 75.7% (159/210), second most frequent case is muscular infundibular (MI) VSD of which incidence is 13.3% (28/210), the third is subarterial (SA) VSD of which incidence is 6.2% (13/210), and the fourth is perimembranous to subarterial (PM-SA) VSD of which incidence is 4.8% (10/210) 2) Twenty three patients (10.9%; 23/ 210) had subarterial ventricular septal defects (SA+PM-SA) of which incidence in our study is significantly higher than that of studies in western countries (5.5%), but no case of aortic insufficiency, which is commonly found in subarterial VSD in isolated VSD, was found in subarterial type of Tetralogy of Fallot. 3) The incidence of pulmonary valve stenosis (100%) is significantly higher in subarterial VSD (SA+PM-SA) (p<0.05) and the incidence of pulmonary artery anomaly (8. 7%) is much lower than that of other two types (22.5% ) but this difference is not stastically significant (0. 05
Keywords :TOF, VSD classification