Cardiac output is defined as:
- AStroke volume $\times$ Heart rate $= 60 \; mL/\text{beat} \times 72 \; \text{bpm}$
- BStroke volume $\times$ Heart rate $= 70 \; mL/\text{beat} \times 72 \; \text{bpm}$
- CStroke volume $\times$ Heart rate $= 80 \; mL/\text{beat} \times 72 \; \text{bpm}$
- DStroke volume $\times$ Heart rate $= 90 \; mL/\text{beat} \times 72 \; \text{bpm}$
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