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Cardiac Output

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Question

Calculate the cardiac output (ml)of an athlete if the volume of blood pumped by each ventricle per beat is 70 ml and the heart rate is 80 beats per minute.

A

5040

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B

5400

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C

5600

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D

5800

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Solution

The correct option is C 5600
Cardiac output is the amount of blood pumped by the heart in one minute. It is the product of stroke volume and heart rate.

Stroke volume is the volume of blood that is ejected from each ventricle due to the contraction of the ventricles. The stroke volume is nearly 70 ml /heartbeat. Heart rate is the number of times the heart beats in one minute. For an adult human, the heartbeat is 72 times per minute.

Given data:
Stroke volume = 70ml
Heart rate = 80 beats/ minute
So, Cardiac output = Stroke volume $\times$ Heart rate
= (70 $\times$ 80)ml
= 5600ml

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Similar questions

Q. Calculate the cardiac output (ml)of an athlete if the volume of blood pumped by each ventricle per beat is 70 ml and the heart rate is 80 beats per minute.

Q. 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?

Q. (i) During a cardiac cycle each ventricle pumps out approximately

70

mL of blood which is called the stroke volume.
(ii) The cardiac output of an athlete will be much higher than that of an ordinary man.
(iii) The body has no the ability to alter the stroke volume and the cardiac output.
(iv) The cardiac output can be defined as the volume of blood pumped out by each ventricle per minute.
(v) Volume of blood pumped by left ventricle is higher than blood pumped by right ventricle.
How many statements are correct?

Q. In a cardiac output of 5250 ml per minute, with 75 heart beats per minute, the stroke volume is?

Q. Read the following statements:
(i) During a cardiac cycle, both ventricles pump out approximately

70 ml

of blood called stroke volume.
(ii) Cardiac output can be defined as volume of blood pumped out by both ventricle per minute.
(iii) Cardiac output of an athlete will be higher than that of an ordinary man.
(iv) During each cardiac cycle two prominent sounds are produced.
How many statements are correct?

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