Fetal Hemodynamic Alterations During Advancing Gestation

  • M. A. Heymann

Abstract

Since oxygenation for the fetus occurs in the placenta the fetal circulation is arranged so that several sites of shunting are present. In addition, preferential flow and streaming take place to offset the disadvantages of intermixing of oxygenated and deoxygenated blood returning through the venous circulations. In the presence of fetal stress these patterns are changed, and the distribution of blood flow to different organs is modified. Since individual organ blood flows normally change as gestation advances an understanding and knowledge of these changes is important when considering circulatory alterations invoked by stress.

Keywords

Histamine Prostaglandin Norepinephrine Catecholamine Cardiol 

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References

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Copyright information

© Springer-Verlag Berlin Heidelberg 1985

Authors and Affiliations

  • M. A. Heymann
    • 1
  1. 1.Cardiovascular Research Institute and Departments of Pediatrics, Physiology and Obstetrics, Gynecology and Reproductive Sciences, 1403 HSEUniversity of CaliforniaSan FranciscoUSA

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