A heart pumps 80 mL blood at an average pressure of 100 mm of Hg per beat. Assuming heartbeat rate as 60 beats per minute what will be the power output of heart?

Options

A. 1W
B. 2.75W
C. 1.06W
D. 0.5W

Answer

C

Explanation

Work done by the heart=PdV
`dV=(60)xx(80xx10^(-6)m^(3))`
`P=(100mm"of"Hg)xx((1.01xx1)^(5)"Pa")/(760"mm of Hg")`
`=1.33xx10^(4)`Pa
Power `=("Work done")/("Time")`
`=(1.33xx10^(4)"Pa"xx60xx80xx10^(-6)m^(3))/(60s)`
Power `=1.06` W