Uterine and umbilical flow velocity waveforms in the supine hypotensive syndrome

Changes in central hemodynamics and uterine and umbilical artery flow velocity waveforms were studied in ten healthy women 33-41 weeks pregnant who had signs of the supine hypotensive syndrome. When changing the position from left lateral recumbency to supine, there was an initial increase in mean a...

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Bibliographic Details
Published in:	Obstetrics and gynecology (New York. 1953) Vol. 76; no. 2; p. 176
Main Authors:	Pirhonen, J P, Erkkola, R U
Format:	Journal Article
Language:	English
Published:	United States 01-08-1990
Subjects:	Adult Blood Flow Velocity Female Hemodynamics Humans Hypotension, Orthostatic - physiopathology Pregnancy Pregnancy Complications, Cardiovascular - physiopathology Regional Blood Flow Supination - physiology Umbilical Arteries - physiology Uterus - blood supply
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Summary:	Changes in central hemodynamics and uterine and umbilical artery flow velocity waveforms were studied in ten healthy women 33-41 weeks pregnant who had signs of the supine hypotensive syndrome. When changing the position from left lateral recumbency to supine, there was an initial increase in mean arterial pressure (MAP) of 13% and in maternal heart rate of 30%. After this, the MAP decreased by 19% and, simultaneously, a 26% increase (P = .002) in uterine artery systolic/diastolic (S/D) ratio was recorded. When the changes in MAP and in the uterine artery S/D ratio were compared, the response was slower and recovery faster in the uterine circulation. Two patients evidenced a transient deceleration in the fetal heart rate and a simultaneous increase in the umbilical artery S/D ratio.
ISSN:	0029-7844