All issues > Volume 32(8); 1989

Original Article

J Korean Pediatr Soc. 1989;32(8):1045-1050. Published online August 31, 1989.

Left Ventricular Cardiac Output in Term Newborn Infants: Changes Associated with Closure of Ductus Arteriosus.

Ho Jin Oh¹, You In Park¹, Chang Sung Son¹, Young Chang Tokgo¹, Pyung Hwa Choe¹

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

Received: July 10, 1989;  Accepted: July 10, 1989.

Abstract

We studied on leftventricular Cardiac output on the 25 normal newborn infants by using pulse Doppler echocardiography, before & after closure of ductus arteriosus, we also made closing time of ductus arteriousus by using pulsed & color Doppler echocardiography. The results were as follows; 1) The closure of ductus arteriosus was noted before 24hr of age in 3 cases (12%), 48hr of age in 19 cases (76%), 72hrs of age in 24 cases (96%), 1 cas in 76hrs (100%) and mean age of closure was 33.2± 10.6hr after birth. 2) The left ventricular cardiac output was 861.0± 146.1 ml/min in time of patency of ductus arterious and 819.6± 163.0 ml/min after closure. This result was statistically significant (p<0.05). 3) The left ventricular cardiac output corrected by body weight was 256.9±35.1 ml/min/kg in time of patency of ductus arteriosus, and 240.2±38.1 ml/min/kg after closure. This result was statistically significant(p< 0.01).

Keywords :Ductus arteriosus, Left ventricular cardiac output