Stroke volume is most accurately described as the amount of blood ejected per beat.

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Multiple Choice

Stroke volume is most accurately described as the amount of blood ejected per beat.

Stroke volume is the amount of blood ejected with each heartbeat. That’s why the best description is milliliters per beat—it captures the volume moved during a single contraction of the ventricle. If you multiply stroke volume by heart rate, you get cardiac output, the total blood pumped per minute (often in liters per minute). For example, about 70 mL per beat at 75 beats per minute yields roughly 5.25 L per minute. The other units describe flow over time (liters or milliliters per minute) or heart rate (beats per minute), not the volume per contraction.

Stroke volume is the amount of blood ejected with each heartbeat. That’s why the best description is milliliters per beat—it captures the volume moved during a single contraction of the ventricle. If you multiply stroke volume by heart rate, you get cardiac output, the total blood pumped per minute (often in liters per minute). For example, about 70 mL per beat at 75 beats per minute yields roughly 5.25 L per minute. The other units describe flow over time (liters or milliliters per minute) or heart rate (beats per minute), not the volume per contraction.

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