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 the diastole is 100 mL and at the end of ventricular system is 50 mL? (2019) a. 50 beats per minute b. 75 beats per minute c. 100 beats per minute d. 125 beats per minute
Option C. 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 =50ml Stroke volume =100−50 =50ml. So, 5000ml =50ml × Heart rate So, Heart rate =100 beats per minute. So, the correct answer is '100 beats per minute'
