Cardiac output increases by 30-50% in which patient position?

Cardiac output increases by 30-50% in which patient position?

• A. Left lateral recumbent position
• B. Supine
• C. Prone
• D. Upright seated

Answer: (A)

Relieving the gravid uterus’ pressure on the major veins while lying on the left side increases the return of blood to the heart. This boost in venous return raises the preload, which increases stroke volume and cardiac output by roughly 30-50% compared with other positions. In the supine position, the uterus can compress the inferior vena cava, reducing venous return and cardiac output. An upright seated position allows blood to pool in the legs, also lowering venous return. The prone position isn’t practical in pregnancy and doesn’t provide the same venous return benefit. Therefore, the left lateral recumbent position best increases cardiac output by about 30-50%.

Relieving the gravid uterus’ pressure on the major veins while lying on the left side increases the return of blood to the heart. This boost in venous return raises the preload, which increases stroke volume and cardiac output by roughly 30-50% compared with other positions.

In the supine position, the uterus can compress the inferior vena cava, reducing venous return and cardiac output. An upright seated position allows blood to pool in the legs, also lowering venous return. The prone position isn’t practical in pregnancy and doesn’t provide the same venous return benefit. Therefore, the left lateral recumbent position best increases cardiac output by about 30-50%.