Perinatal changes in size of the fetal great arteries

Soon Kim Hae, Mi Hong Young, Sohn Sejung, Yun Choi Jung

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Background and Objectives: At birth, the fetal circulation must immediately adapt to extrauterine life. Our goal was to evaluate perinatal changes in the size of the aorta (Ao) and pulmonary artery (PA), and to investigate factors influencing these changes. Subjects and Methods: Aortic and PA diameters were measured by echocardiography in 50 healthy term babies one day before and 4 to 5 days after birth. Results: Compared with prenatal measurements, the Ao increased (from 7.4±0.6 mm to 8.4±0.6 mm, p<0.01) and the PA decreased (from 9.5 ±0.8 mm to 8.7±0.8 mm, p<0.01) in size after birth. The Ao/PA ratio increased from 0.78±0.07 before birth to 0.97±0.08 after birth (p<0.01), but there was no significant difference in the sum of the diameters of the great arteries between pre- and postnatal measurements. Postnatal increases in aortic size correlated negatively with prenatal aortic diameter (r=-0.37, p<0.05), but was not related to body weight. According to multiple regression analysis, significant variables for predicting perinatal changes in size of the Ao and PA were the prenatal Ao/PA ratio and the prenatal PA diameter, respectively. Conclusion: Despite a difference existing in prenatal diameters between Ao and PA, circulatory changes at birth make the great artery sizes equal, and do so regardless of body weight.

Original languageEnglish
Pages (from-to)414-417
Number of pages4
JournalKorean Circulation Journal
Issue number10
StatePublished - Oct 2009


  • Aorta
  • Echocardiography
  • Fetus
  • Pulmonary artery


Dive into the research topics of 'Perinatal changes in size of the fetal great arteries'. Together they form a unique fingerprint.

Cite this