All issues > Volume 33(11); 1990

Original Article

J Korean Pediatr Soc. 1990;33(11):1533-1539. Published online November 30, 1990.

Echocardiographic Evaluation of Sequential Change of Cardiac Function in Normal Neonates.

Ji In Park¹, Chul Ha Kim¹, Byoung Hoon Yoo¹

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

Received: June 22, 1990;  Accepted: September 19, 1990.

Abstract

Echocardigraphy was done on the first and the second day of life in 23 normal full term newborns to evaluate the sequential change of cardiac function of the normal neonates. The results were as follows. 1) On the first day of life, all of the measurements of diastolic filling except peak A velocity were significantly different when the right and left ventricle were compared. For the right, compared with left ventricle, peak E velocity, peak E/A ratio, E/total area, E/A area ratio, 1/3 area fraction were each significantly lower, whereas A/total area was significantly higher. 2) On the second day of life, comparison of right with left ventricle demonstrated that the right ventricle had significantly lower value for E/total area, E/A area ratio, and peak E/A ratio, but significantly higher value for peak A velocity. A/total area, peak E velocity, and 1/3 area fraction were not significantly different in two ventricles. 3) For sequential analysis of mitral valve, the most of the measurements of left ventricular diastolic filling except peak E velocity and peak A velocity were significantly different. Comparing day 1 and day 2 of life, E/total area, E/A area ratio, peak E/A ratio, and 1/3 area fraction were significantly lower on the first day of life, and A/total area was significantly lower on the second day of life. 4) For sequential analysis of tricuspid valve, peak A velocity was not different significantly but peak E velocity, E/total area, E/A area ratio, peak E/A, 1/3 area fraction were significantly higher and A/total area was significantly lower on the second day of life. 5) Right ventricular systolic time interval was significantly lower on the second day than the first day of life, but left ventricular systolic time interval was no sugnificant difference between day 1 and 2. On the first day of life, STI was not different in two ventricles. But on the second day of life, right ventricular STI was significantly lower than that of left ventricle. 6) Heart rate and shortening fraction were not significantly different between the first day and the second day of life.

Keywords :Echocardiography, Normal neontes, Cardiac function