Cardiac Output

How much blood a heart pumps in an interval, usually a minute, is the cardiac output. Cardiac output is simply the heart rate times the stroke volume. Stroke volume is the volume of blood the left ventricle ejects into the aorta each beat. The right ventricle ejects the same volume into the pulmonary circulation. Seventy-five beats a minute times seventy milliliters per beat equals a cardiac output of five thousand two hundred and fifty milliliters each minute. Cardiac output varies from high outputs of ten or more liters during exercise to five liters or less at rest.

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