Postnatal Changes in Left Ventricular Performance in Early Neonatal Life
Journal of the Korean Pediatric Society
;
: 1168-1173, 2000.
Artigo
em Coreano
| WPRIM
| ID: wpr-150998
ABSTRACT
PURPOSE:
This study was undertaken to investigate changes in cardiac performance in early neo-natal life by observing the changes of left ventricular(LV) function and volume according to the size of ductus arteriosus.METHODS:
The study group consisted of 21 full-term Cesarean section neonates who were admitted to the nursery of Korea University Hospital. We serially investigated the patency and size of the ductus at 2, 24, 120 hours after birth by two-dimensional echocardiography. The standard two-dimensional tracings of LV volume were obtained under the guidance of apical two- and four-chamber views. LV end-diastolic and end-systolic volumes were calculated using a biplanar Simpson's method.RESULTS:
LV end-diastolic volume was highest(3.44>0.4mm) at 2 hours of age(P<0.01), being constant from 24 to 120 hours. LV contractility, indicated by the mean normalized systolic ejection rate, remained constant during the whole period of investigation. The size of the ductus arteriosus was maximal at 2 hours after birth, and decreased significantly at 24 hours of age (P<0.01). The size of ductus arteriosus demonstrated a close linear correlation with the left ventricular end-diastolic volume(y=0.17x+2.92, r=0.59 P<0.01).CONCLUSION:
Changes in LV end-diastolic volume soon after birth depend on changes in ductus arteriosus flow, which in turn is affected by ductal diameter. Upon patency of the ductus arteriosus, the newborn left ventricle operates at maximal performance with only a limited capacity to increase contractility.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Ecocardiografia
/
Cesárea
/
Função Ventricular Esquerda
/
Parto
/
Canal Arterial
/
Permeabilidade do Canal Arterial
/
Ventrículos do Coração
/
Coreia (Geográfico)
/
Berçários para Lactentes
Limite:
Feminino
/
Humanos
/
Recém-Nascido
/
Gravidez
País/Região como assunto:
Ásia
Idioma:
Coreano
Revista:
Journal of the Korean Pediatric Society
Ano de publicação:
2000
Tipo de documento:
Artigo
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