Reductions in venous return cause reductions in both stroke volume and cardiac output.

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Venous return refers to the amount of blood that returns to the heart from the veins. A reduction in venous return can occur due to factors like dehydration, hemorrhage, or changes in posture. Due to the reduced amount of blood returned to the heart, the atria are filled with less blood, and subsequently, the amount of blood that gets ejected out with each heartbeat (stroke volume) decreases. As a result, the overall amount of blood pumped out of the heart per minute (cardiac output) also decreases. Therefore, a reduction in venous return causes reductions in both stroke volume and cardiac output.

Reductions in Venous Return Cause Reductions in Both Stroke Volume