Starling's Law of the Heart Relates Force of Myocardial Contraction

Question

Starling's law of the heart relates force of myocardial contraction with
A) heart rate.
B) preload.
C) end-systolic volume.
D) blood pressure.

Accepted Answer

Starling's law of the heart states that there is a direct relationship between the amount of stretch (preload) on cardiac muscle fibers and the force of contraction. As preload increases, the force of contraction also increases, leading to a greater stroke volume and cardiac output. Therefore, the correct choice is B, preload.