AEMCA Practice Exam

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Which term describes the number of heart constrictions per minute?

Stroke volume
Cardiac output
Heart rate
Vein tone

The correct answer is: Heart rate

The term that describes the number of heart constrictions per minute is heart rate. This measurement indicates how many times the heart beats in one minute and is typically expressed in beats per minute (BPM). It is a critical parameter used in cardiovascular health assessment, as it provides insights into the efficiency and condition of the heart. In contrast, stroke volume refers to the amount of blood pumped by the heart with each beat and is a different measure of heart function. Cardiac output, on the other hand, combines stroke volume with heart rate to determine the total volume of blood the heart pumps in one minute. Finally, vein tone pertains to the tension or stiffness of the veins and does not relate directly to the heart's beating frequency. Thus, the correct term specifically addressing the rate of heart contractions is heart rate.