All issues > Volume 37(9); 1994

Original Article

J Korean Pediatr Soc. 1994;37(9):1213-1219. Published online September 15, 1994.

Pulmonary Venous Flow Pattern by Doppler Echocardiography before and after Closure of Ductus Arteriousus in Newborns

Young Mi YM Hong¹

¹Department of Pediatrics, College of Medicine, Ewha Womans University, Seoul, Korea

Abstract

Color Doppler echocardiography was performed to evaluate pulmonary venous flow pattern at 1st~2nd day of birth in 84 fullterm newborns (36: patent ductus arteriosus, 48: closed ductus arteriosus). Aortic and pulmonic diameter, velocity and integral were estimated. The purpose of this study ascertained that patent ductus arteriosus changed the pulmonary vein velocity and flow integral. The results were as follows. 1)There was no significant difference in aortic diameter and peak velocity, but significant difference in flow integral before and after closure of ductus arteriosus. 2)There was no significant difference in pulmonic velocity and flow integral, but significant difference in pulmonic diameter before and after closure of ductus arteriosus. 3)Early systolic flow velocity, late systolic flow velocity, diastolic flow velocity in pulmonary vein were higher in patent ductus arteriosus group at 1st~2nd day, but atrial reversal flow velocity was not significantly different. 4)Diastolic pulmonary venous flow integral was higher in patent ductus arteriosus group at 1st~2nd day. Thus four distinct phases(early systolic wave, late systolic wave, diastolic wave, and atrial reversal wave) were identified before and after closure of ductus arteriosus. Left to right shunt via ductus arteriosus increased systolic, diastolic pulmonic venous velocity and diastolic flow integral. We will investigate pulmonary venous flow patterns in other left to right congenital heart diseases or mitral regurgitation.

Keywords :Pulmonary venous flow, Ductus arteriosus, Color Doppler echocardiography