ACSM
010-111 · Question #3
010-111 Question #3: Real Exam Question with Answer & Explanation
The correct answer is D. stroke volume.. Cardiac output is calculated by multiplying heart rate by stroke volume, where stroke volume is the volume of blood ejected by the left ventricle per beat.
Question
Cardiac output is a product of heart rate multiplied by ___________.
Options
- Aperipheral resistance.
- Bblood pressure.
- Cblood volume.
- Dstroke volume.
Explanation
Cardiac output is calculated by multiplying heart rate by stroke volume, where stroke volume is the volume of blood ejected by the left ventricle per beat.
Common mistakes.
- A. Peripheral resistance is a component of the equation for mean arterial pressure (MAP = CO x TPR), not a direct multiplier in the cardiac output formula.
- B. Blood pressure is a consequence of cardiac output and vascular resistance combined, not a factor used to calculate cardiac output itself.
- C. Total blood volume influences preload and therefore indirectly affects stroke volume, but it is not the direct variable multiplied by heart rate in the cardiac output equation.
Concept tested. Cardiac output formula - heart rate and stroke volume
Reference. https://www.nhlbi.nih.gov/health/heart/heart-works
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