Select the correct statement about cardiac output.
A) Decreased venous return will result in increased end diastolic volume.
B) Stroke volume increases if end diastolic volume decreases.
C) A slow heart rate increases end diastolic volume, stroke volume, and force of contraction.
D) If a semilunar valve were partially obstructed, the end systolic volume in the affected ventricle would be decreased.

Question

Quizplus · Accepted Answer

A slow heart rate (bradycardia) increases the time between contractions which allows for increased filling of the ventricles during diastole, resulting in increased end diastolic volume, stroke volume, and force of contraction. Decreased venous return would result in decreased end diastolic volume. Stroke volume increases if end diastolic volume increases due to the Frank-Starling mechanism. If a semilunar valve were partially obstructed, the end systolic volume in the affected ventricle would be increased due to decreased ejection of blood from the ventricle.

Select the Correct Statement About Cardiac Output