Physiological Changes in Pregnancy
Primigravida with full term, c/o faintness on lying down & she feels well when turns to side or sitting position. This is due to: (AIIMS May 2012)
|A||Increased abdominal pressure|
|C||Increased intracranial pressure|
|D||After heavy lunch|
a. 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.
b. 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.
c. Aortocaval compression is thought to be the cause of supine hypotensive syndrome. Supine hypotensive syndrome is characterized by pallor, bradycardia, sweating, nausea, hypotension and dizziness and occurs when a pregnant woman lies on her back and resolves when she is turned on her side.