supine hypotensive syndrome

su·pine hy·po·ten·sive syn·drome

in the supine pregnant woman at or near term, maternal hypotension; maternal hypotension is due to obstruction by the gravid uterus of the inferior vena cava with resulting decrease in venous return to the heart; fetal hypoxia is due to maternal hypotension and obstruction of maternal aorta by the gravid uterus with resulting decrease in placental perfusion.

su·pine hy·po·ten·sive syn·drome

in the supine pregnant woman at or near term, maternal hypotension; maternal hypotension is due to obstruction by the gravid uterus of the inferior vena cava with resulting decrease in venous return to the heart; fetal hypoxia is due to maternal hypotension and obstruction of maternal aorta by the gravid uterus with resulting decrease in placental perfusion.

supine hypotensive syndrome

Sudden fall in blood pressure due to diminished venous return caused by compression of the vena cava by the gravid uterus when the pregnant woman rests flat on her back. The low venous return also results in decreased placental perfusion and potentially in fetal hypoxia.
Synonym: vena caval syndrome
References in periodicals archive ?
Modifications often become unavoidable during the second trimester, largely because of the concern of supine hypotensive syndrome.
In addition to supine hypotensive syndrome, many women begin to experience specific physiological changes during the third trimester that lead to discomfort, pain, or decreased ability to perform specific movements.
In nor-mal pregnancy, preload will be decreased and inci-dence of supine hypotensive syndrome (SHS) will be increased because of pressure effect of enlarged uterus on inferior vena cava (IVC).
This compression may decrease cardiac output and cause supine hypotensive syndrome.
If a woman has no symptoms of supine hypotensive syndrome, AFAA recommends women exercise or stretch conservatively in the supine position for no more than three to four minutes, then roll to their sides.