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Estimation of Pressure Difference Between Right and Left Ventricle in Ventricular Septal Defect with Doppler Echocardiography.

Journal of the Korean Pediatric Society 1988;31(3):315-321.
Published online March 31, 1988.
Estimation of Pressure Difference Between Right and Left Ventricle in Ventricular Septal Defect with Doppler Echocardiography.
Myung Chul Cho, Byung Kiu Park, Woo Sung Park, Chung Il Noh, Jung Yun Choi, Yong Soo Yoon, Chang Yee Hong
Department of Pediatrics, College of Medicine, Seoul National University, Seoul, Korea
심실 중격결손증에서 Doppler 심에코도를 이용한 좌우 심실 압력차이 측정
조명철, 박병규, 박우성, 노정일, 최정연, 윤용수, 홍창의
서울대학교 의과대학 소아과학교실
Received: 20 November 1987
Abstract
We compared the interventricular pressure gradient with Doppler echocardiography and that measured during cardiac catheterization in 48 children who were admitted for diagnostic cardiac catheterization and angiography to the ward of Pediatrics, Seoul National University Children’s Hospital during the period of 7 months from June to December 1986. Among 48 cases of simple ventricular septal defect, 21 cases were supracristal (type I), and 27 cases were membranous defects (type II). We measured the maximal velocity by Doppler echocardiography and the pressure gradient was predicted from the maximal velocity by use of the simplified Bernoulli equation (pressure gradient= 4 x maximal velocity2). In this study the Doppler-predicted pressure gradient correlated well with the catheterization- measured pressure gradient (peak to peak pressure gradient between two ventricels) in both types of ventricular septal defect (Type I: r=0.81, Type II: r=0.91). Thus, the Doppler echocardiaography is a reliable means of estimating instantaneous interventricular pressure gradient in children with isolated ventricular septal defect.
Key Words: Ventricular septal defetct, Maximal velocity, Pressure gradient, Doppler echocardiography


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