Question

What can an increase in venous return cause ______?

Answer 1

Increased pulmonary venous return to the left atrium leads to increased filling (preload) of the left ventricle, which increases left ventricular stroke volume by the Frank-Starling mechanism.

Answer 2

Increasing venous return increases the amount of blood to be transferred back to the heart to be re-oxygenated. The re-oxygenated blood is then delivered to the muscles around the body. The more the venous return is increased, the more oxygen will be available for the muscles to use.