Vardiac output is determined by which one of these?
a-heart rate
b-stroke
c-blood flow
d-both a b
Cardiac output (CO) is the volume of blood pumped by heart in one minute. Cardiac output is a very complex feature determined by various factors such as stroke volume ( volume of blood pumped by the heart in one cardiac cycle ventricles = 70 ml), heart rate, Stroke volume itself is determined by many factors such as diastolic volume, diastolic pressure, contractibilty, etc.
Cardiac output is the product of stroke volume and heart rate.
Heart rate: Average 72 times beat/minute, Stoke volume = 70 mL
Cardiac output = Stoke volume × Heart rate
= 70 mL × 72 times / min
= 5000 mL
Thus, correct answer is option d) Both stroke volume and heart rate
Cardiac output is the product of stroke volume and heart rate.
Heart rate: Average 72 times beat/minute, Stoke volume = 70 mL
Cardiac output = Stoke volume × Heart rate
= 70 mL × 72 times / min
= 5000 mL
Thus, correct answer is option d) Both stroke volume and heart rate