What is supine hypotensive syndrome?

Supine hypotensive syndrome refers specifically to the condition that occurs when a pregnant woman lies flat on her back, leading to compression of the inferior vena cava. This compression can impede blood flow returning to the heart, resulting in a decrease in cardiac output and subsequently causing a drop in blood pressure. This syndrome typically occurs in later stages of pregnancy, particularly in the third trimester when the enlarging uterus can exert pressure on the vena cava.

Understanding this condition is particularly important for healthcare providers working with pregnant patients, as it can lead to symptoms like dizziness, lightheadedness, or even fainting when a patient is in the supine position. Management often involves repositioning the patient to their side, usually the left lateral position, which alleviates pressure on the vena cava and restores normal blood flow and blood pressure.