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Cardiac Output

Cardiac outpu...

Question

Cardiac output is

A

4 litres/minute

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B

5.3 litres/minute

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C

6.3 litres/minute

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D

7.3 litres/minute

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Solution

The correct option is B 5.3 litres/minute
Cardiac output is defined as the volume of blood pumped by left ventricle into the aorta per minute.
It is calculated as:
Cardiac output = Stroke volume (SV) x Heart rate (HR)
where, stroke volume is the amount of blood supplied to heart by the veins and is about 5250 mL/min and the heart rate or heart beat is about 75
Therefore, cardiac output = 70 mL x 75
= 5250 mL/ min or 5.25 L/min ≈ 5.3 L/min
So, the correct answer is '5.3 litres/minute'.

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