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

Journal of the Korean Pediatric Society 1990;33(8):1081-1086.
Published online August 31, 1990.
Studies on the Change of Pulmonary Artery Pressure in Early Neonatal Period.
Jung Ae Kim, Yung Kyun Oh, Byung Kiu Park, Hee Shang Youn, Myung Kul Yum
Department of Pediatrics, College of Medicine, Kyungsang National University, Jinju, Korea
신생아 초기의 폐동맥압의 변화에 대한 연구*
김정애, 오영균, 박병규, 윤희상, 염명걸
경상대학교 의과대학 소아과학교실
Received: 23 February 1990   • Accepted: 24 May 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.
Key Words: Pulmonary artery pressure, Pc -To interval, Neonatal period


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