What would be the heart rate of a person if the cardiac output is 5 L, blood volume in the ventricles at the end of diastole is 100 mL and at the end of ventricular systole is 50 mL ?

Options

A. 125 beats per minute
B. 50 beats per minute
C. 75 beats per minute
D. 100 beats per minute

Answer

D

Explanation

Stroke volume = End diastolic volume – End systolic volume
=100-50
=50 mL
Heart beat = Cardic output / Stroke volume
=5000/50
=100 per minute