What term describes the volume of blood pumped out by the heart ventricles per minute?

What term describes the volume of blood pumped out by the heart ventricles per minute?

• A. Stroke Volume
• B. Cardiac Output
• C. End-Diastolic Volume
• D. Heart Rate

Answer: (B)

The concept here is understanding what describes the amount of blood the heart pumps each minute. This is cardiac output. It tells us how much blood is ejected by the ventricles per minute and is calculated by multiplying the amount ejected with each beat (stroke volume) by how many beats occur each minute (heart rate): CO = SV × HR. For example, if stroke volume is about 70 mL per beat and heart rate is 70 beats per minute, cardiac output is roughly 4900 mL per minute (about 5 L/min). Stroke volume is the amount ejected with each beat, not per minute. End-diastolic volume is the volume in the ventricles at the end of filling, before contraction, and heart rate is the number of beats per minute, not the total volume pumped per minute.

The concept here is understanding what describes the amount of blood the heart pumps each minute. This is cardiac output. It tells us how much blood is ejected by the ventricles per minute and is calculated by multiplying the amount ejected with each beat (stroke volume) by how many beats occur each minute (heart rate): CO = SV × HR. For example, if stroke volume is about 70 mL per beat and heart rate is 70 beats per minute, cardiac output is roughly 4900 mL per minute (about 5 L/min).

Stroke volume is the amount ejected with each beat, not per minute. End-diastolic volume is the volume in the ventricles at the end of filling, before contraction, and heart rate is the number of beats per minute, not the total volume pumped per minute.