Venodilation

Question

Venodilation
A) increases afterload.
B) decreases preload.
C) increases end-diastolic volume.
D) stretches the ventricular myocardium.

Accepted Answer

Vasodilation decreases resistance in the blood vessels, leading to decreased pressure in the heart chambers and venous system. This decreases the amount of blood returning to the heart (preload), leading to decreased ventricular filling. Therefore, option B is correct as it decreases preload. Choices A, C, and D are incorrect as vasodilation does not increase afterload, end-diastolic volume, or stretch the ventricular myocardium.