All issues > Volume 33(8); 1990

Original Article

J Korean Pediatr Soc. 1990;33(8):1081-1086. Published online August 31, 1990.

Studies on the Change of Pulmonary Artery Pressure in Early Neonatal Period.

Jung Ae Kim¹, Yung Kyun Oh¹, Byung Kiu Park¹, Hee Shang Youn¹, Myung Kul Yum¹

¹Department of Pediatrics, College of Medicine, Kyungsang National University, Jinju, Korea

Received: February 23, 1990;  Accepted: May 24, 1990.

Abstract

The change of postnatal pulmonary artery pressure was studied with doppler echocardiography and phonocardiogram in 40 normal full term neonates before 6 hours, between 6 〜 24 hours, 24~48 hours, 48-72 hours, 72 hours 〜 7 days. The results of study were as follows: Pc-To interval (sec) decreased (0. 071 ±0.002, 0.062±0.003, 0.050±0.002, 0.037±0.007, 0.027±0.003) and AT/ET ratio increased (0. 24±0.01, 0.30±0.02, 0.40±0.03, 0.40±0.04, 0.51 ±0.04) during those period, which means steady decline of pulmonary artery pressure during 3 〜7 days of age rather than abrupt decrease within 1 day of age and approximation of pulmonary artery pressure to normal adult values at 3〜7 days of age.

Keywords :Pulmonary artery pressure, Pc -To interval, Neonatal period