<unk> , is<unk>  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 result in loss of consciousness and in extreme circumstances fetal demise.<unk><unk>  is thought to be the cause of supine hypotensive syndrome.  Supine hypotensive syndrome  is characterized by pallor, tachycardia, sweating, nausea, hypotension and dizziness and occurs when a pregnant woman lies on her back and resolves when they are turned on their side.
Aortocaval compression syndrome
Superior vena cava syndrome
Thoracic aortic aneurysm
Aortic dissection
Cholesterol emboli syndrome
Acute aortic syndrome
Aortic rupture
Aortic aneurysm