Question

The cardiac output (CO) for a patient with a heart rate (HR) of 80 beats/min and a stroke volume (SV) of 80 mL/beat would be ________?

1) 6400 L/min
2) 6400 mL/min
3) 6.4 mL/min
4) 1 L/min
5) 5.0 L/min

Answer 1

The cardiac output (CO) for a patient with a heart rate (HR) of 80 beats/min and a stroke volume (SV) of 80 mL/beat is 6400 mL/min.

Step-by-step explanation:

The cardiac output (CO) is the amount of blood pumped by each ventricle during one minute, and it can be calculated by the formula CO = HR × SV, where HR represents heart rate and SV denotes stroke volume.

In the case of a patient with a heart rate (HR) of 80 beats/min and a stroke volume (SV) of 80 mL/beat, the calculation for CO would be 80 beats/min multiplied by 80 mL/beat, which equals 6400 mL/min. Therefore, the correct answer is (2) 6400 mL/min.

It's important to note that during physical activities such as exercise, CO can increase significantly. Healthy young individuals might see a CO of approximately 19.5 L/min during exercise, which is a substantial increase from the resting rate.