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

Question

Quizplus · Accepted Answer

Starling's law of the heart states that the force of myocardial contraction is directly proportional to the initial length or stretched state of the cardiac muscle fibers, which is determined by the preload or ventricular filling pressure. Therefore, option B, preload, is the correct choice. Heart rate (option A), end-systolic volume (option C), and blood pressure (option D) are not directly related to Starling's law of the heart.

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