Question

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

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

Answer 1

The correct option is D 100 beats per minute

Stroke volume = End diastolic volume – End systolic volume
= 100 – 50
= 50 mL

Heart beat = Cardic output / Stroke volume

= 5000 / 50
= 100 per minute