Role of the pulmonary circulation in the distribution of human fetal cardiac output during the second half of pregnancy

Juha Rasanen, Dennis C. Wood, Stuart Weiner, Abraham Ludomirski, James C. Huhta

Research output: Contribution to journalArticle

216 Scopus citations

Abstract

By using Doppler echocardiography, we determined the normal distribution of human fetal combined cardiac output (CCO) from the left and right ventricles. We also established weight-indexed pulmonary and systemic vascular resistances (R(Pi) and R(Si) respectively) and changes during the second half of pregnancy. Methods and Results: Blood flows at the aortic and pulmonary valve annuli (LVCO and RVCO, respectively), right and left pulmonary arteries (Q(P)), and ductus arteriosus (Q(DA)) were calculated in 63 normal fetuses. Foramen ovale blood flow (Q(FO)=LVCO-Q(P)) was estimated. From 20 to 30 weeks of gestation, the proportion of Q(P) of the CCO increased (from 13% to 25%, P

Original languageEnglish (US)
Pages (from-to)1068-1073
Number of pages6
JournalCirculation
Volume94
Issue number5
Publication statusPublished - 1996
Externally publishedYes

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Keywords

  • cardiac output
  • echocardiography
  • hemodynamics
  • physiology
  • ultrasonics

ASJC Scopus subject areas

  • Physiology
  • Cardiology and Cardiovascular Medicine

Cite this

Rasanen, J., Wood, D. C., Weiner, S., Ludomirski, A., & Huhta, J. C. (1996). Role of the pulmonary circulation in the distribution of human fetal cardiac output during the second half of pregnancy. Circulation, 94(5), 1068-1073.