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Q.

The blood volume in the ventricle at the end of its diastole is 110 ml and at the end of ventricular systole is 50 ml.  The heart rate of 84 beats per minute. Calculate the cardiac output.

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a

5.7 litres

b

4.5 litres

c

8.2 litres

d

5 litres

answer is A.

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Detailed Solution

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SV = EDV – ESV = 110 – 50 = 60 ml 

Cardiac output = Stroke volume x heart rate = 60 ml X 84 = 5 litres (approx)

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