What is the normal Cardiac Output?

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Multiple Choice

What is the normal Cardiac Output?

Explanation:
Cardiac output is the volume of blood the heart pumps each minute. In a typical resting adult, CO is about 4 to 8 liters per minute. This range comes from the usual resting heart rate and stroke volume: roughly 60–100 beats per minute with a stroke volume around 70 mL per beat, which gives about 4–5 L/min, and the range accommodates normal variations in body size and fitness. Values lower than this at rest (around 2–3 L/min) suggest reduced pump function, while higher values at rest are uncommon and usually only seen with intense exercise or certain hyperdynamic states. During exercise, CO can rise substantially, often up to 12–20 L/min in healthy individuals, but at rest the standard normal range is 4–8 L/min.

Cardiac output is the volume of blood the heart pumps each minute. In a typical resting adult, CO is about 4 to 8 liters per minute. This range comes from the usual resting heart rate and stroke volume: roughly 60–100 beats per minute with a stroke volume around 70 mL per beat, which gives about 4–5 L/min, and the range accommodates normal variations in body size and fitness. Values lower than this at rest (around 2–3 L/min) suggest reduced pump function, while higher values at rest are uncommon and usually only seen with intense exercise or certain hyperdynamic states. During exercise, CO can rise substantially, often up to 12–20 L/min in healthy individuals, but at rest the standard normal range is 4–8 L/min.

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