Factor(s) that affect stroke volume include:
A) preload.
B) heart rate.
C) contractility.
D) afterload.
E) preload, contractility, and afterload.

Question

Quizplus · Accepted Answer

Stroke volume is influenced by preload, contractility, and afterload. Preload refers to the initial stretching of the cardiac myocytes prior to contraction, contractility is the intrinsic ability of cardiac muscle to contract, and afterload is the pressure the heart must work against to eject blood. Heart rate does not directly affect stroke volume but can influence cardiac output.

Factor(s) That Affect Stroke Volume Include