Question

Cardiac output is determined by:

• A. Heart rate
• B. Stroke volume
• C. Both A and B
• D. None of these

Answer 1

The correct option is C

Both A and B

The correct option is C.

Explanation for the correct option:

Option C:

1. Cardiac output is defined as the total volume of blood that is pumped by the heart per minute.
2. Cardiac output is determined by both heart rate and stroke volume.
3. A heart rate is the number of times your heart beats in the span of a minute.
4. Stroke volume is the volume of blood pumped out by the heart through the left ventricle during each systolic cardiac contraction.
5. It is the difference between the end-diastolic and end-systolic volumes of the heart.
6. Cardiac output can be determined as CO=HR×SV, where CO is the cardiac output, HR is the heart rate per minute and SV is the stroke volume or the amount of blood circulated by each heartbeat.

Final answer: Cardiac output is determined by both heart rate and stroke volume.