Calculating cardiac output
A resting heart beats 70 times per minute with a stroke volume of 70 mL. What is the cardiac output?
Answer C: explanation for every choice
A
This adds heart rate and stroke volume (140 mL).
B
This divides stroke volume by heart rate.
C
Correct. CO = HR × SV = 70 × 70 mL = 4,900 mL/min ≈ 4.9 L/min.
D
This misplaces the decimal converting mL to L.
TakeawayCO = HR × SV, about 5 L/min at rest.
Equation usedCardiac output and blood pressure
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