Aortocaval compression syndrome
（重定向自Supine hypotensive syndrome）
Aortocaval compression syndrome is compression of the abdominal aorta and inferior vena cava by the gravid uterus when a pregnant woman lies on her back, i.e. in the supine position. It is a frequent cause of low maternal blood pressure (hypotension), which can in result in loss of consciousness and in extreme circumstances fetal demise.