What would be the heart rate of a person if the cardiac output is 5L, blood volume in the ventricles at the en

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 100 mL and at the end of ventricular systole is 50 mL?

Accepted Answer

According to the text, 'The stroke volume multiplied by the heart rate (no. of beats per min.) gives the cardiac output'. First, calculate the Stroke Volume (SV) = End Diastolic Volume - End Systolic Volume = 100 mL - 50 mL = 50 mL. Then, using the formula Cardiac Output = SV × Heart Rate, we get 5000 mL = 50 mL × HR. Therefore, HR = 5000 / 50 = 100 beats per minute .

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