How is cardiac output defined in relation to heart function?

Cardiac output is defined as the product of stroke volume and heart rate because it quantifies the amount of blood the heart pumps in a minute. Stroke volume refers to the volume of blood ejected from the heart with each contraction, while heart rate is the number of times the heart beats in one minute. Thus, when you multiply stroke volume (the blood ejected per beat) by heart rate (the number of beats per minute), you get cardiac output, which is typically measured in liters per minute.

Understanding cardiac output is crucial in assessing heart function, particularly in situations like acute coronary syndrome, where the heart's ability to pump effectively can be compromised. Consequently, calculating cardiac output allows healthcare providers to evaluate the capacity of the heart to meet the body's demands for blood and oxygen. This parameter is essential for monitoring patients' conditions and determining necessary interventions in cardiac care.