Which of the following intrinsic or extrinsic changes would result in an increase in stroke volume? Group of answer choices An increase in diastolic blood pressure A decrease in preload A decrease in ventricular compliance An increase in venous return Arterial constriction

An increase in diastolic blood pressure

Explanation:

Stroke volume is defined as the volume of blood let out from the left ventricle in a single heartbeat.

Diastolic pressure is the pressure on the arterial wall between heartbeats.

As Stroke volume increases, end diastolic volume increase slightly. This increased disatolic volume leads to the Frank-Starling mechanism which contributes to the increased stroke volume (stroke volume increases when end-diastolic volume increases). Since pressure and volume are directly proportional, an increase in stroke pressure also leads to an increase in the diastolic pressure.

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