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?
50 beats per minute
75 beats per minute
100 beats per minute
125 beats per minute
Cardiac output = stroke volume × Heart rate. Cardiac output = 5L or 5000 ml. Blood volume in ventricles at the end of diastole = 100 ml. Blood volume in ventricles at the end of systole = 50 ml. Stroke volume = 100 - 50 = 50 ml. So, 5000 ml = 50 ml × Heart rate. So, Heart rate = 100 beats per minute.
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