What occurs when the end-systolic volume is reduced?
Understand the Problem
The question is asking about the physiological effects associated with a reduction in end-systolic volume, specifically how it relates to preload, stroke volume, and ventricular contraction strength.
Answer
Reducing end-systolic volume increases stroke volume as ventricles empty more completely.
Reducing end-systolic volume means the ventricles empty more completely during systole, leading to an increased stroke volume if the end-diastolic volume remains the same or increases.
Answer for screen readers
Reducing end-systolic volume means the ventricles empty more completely during systole, leading to an increased stroke volume if the end-diastolic volume remains the same or increases.
More Information
When the end-systolic volume reduces, it often indicates increased cardiac contractility or decreased afterload, both of which enhance the heart's efficiency in pumping blood.
Tips
A common mistake is confusing end-systolic volume with end-diastolic volume. Remember, end-systolic volume refers to the amount of blood left after contraction, not before.
Sources
- The Heart As a Pump 21.2, stroke volume can increase - ScienceDirect - sciencedirect.com
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