Which of the following situations will NOT increase stroke volume?
A)increased end-diastolic volume
B)increased contractility of the heart
C) increased end-systolic volume
D) increased stretch of the cardiac muscle fibres during ventricular filling

Question

Quizplus · Accepted Answer

Increased end-systolic volume represents the residual volume of blood left in the ventricles after contraction. This volume has not contributed to stroke volume and therefore increasing this volume will not increase stroke volume. The other options will increase stroke volume as increased end-diastolic volume means more blood is filling the ventricles, increased contractility means the heart is contracting more forcefully, and increased stretch during ventricular filling means the cardiac muscle fibres can contract more forcefully.

Which of the Following Situations Will NOT Increase Stroke Volume