All issues > Volume 33(7); 1990

Original Article

J Korean Pediatr Soc. 1990;33(7):940-945. Published online July 31, 1990.

Comparisons of the Pressure Gradients between Two-Dimensional Echocardiographic Doppler Studies and Cardiac Catheterization in Pulmonary Stenosis.

Won Ho Choi¹, Young Sook Kang¹, Tae Chan Kwon¹, Chin Moo Kang¹

¹Department of Pediatrics, Keimyung University, School of Medicine, Taegu, Korea

Received: January 15, 1990;  Accepted: March 20, 1990.

Abstract

The right ventricular outflow tract pressure gradient measured by Doppler echocardiography was compared with the pressure gradient by cardiac catheterization in 19 children who were admitted to the department of Pediatrics, Dong San Hospotal during the period of 18 months from January 1987 to June 1988 for the evaluation of heart disease. Among 19 cases, 10 cases were Tetralogy of Fallot, 5 cases were simple pulmonary stenosis, 2 cases were pulmonary stenosis with ASD, 1 case was pulmonary stenosis with VSD and 1 case was pulmonary stenosis with PDA. The maximal velocity was measured 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 cardiac catheteriza- tion measured gradient (r=0.79). Thus, the Doppler echocardiography is a reliable means of estimat- ing right ventricular outflow tract pressure gradient in children with pulmonary stenosis.

Keywords :Pressure Gradients, Pulmonary Stenosis