Question

What would be the cardiac output of a person having 72 heart beats per minute and a stroke volume of 50 mL?
A)360 mL
B)3600 mL
C)7200 mL
D)5000 mL

Answer 1

Hint: Cardiac efficiency is the amount of heart rate (HR) and stroke volume (SV) and is measured in litres per minute. Most typically, the number of times the heart beats in one minute is known as HR. The volume of blood expelled is SV during ventricular contraction or for each cardiac attack.

Complete answer:
We can measure the cardiac performance of a person by multiplying the stroke volume and heart rate. In order to change a human's cardiac output, the stroke volume as well as the heart rate will also be changed. Thus, 72 x 50 = 3600 mL is a person's cardiac output of 72 heartbeats per minute and 50 mL of stroke volume.

Because cardiac output is related to the volume of blood supplied to different areas of the body, it is an essential component of how well the heart can satisfy the demands of the body for sufficient tissue perfusion to be sustained. Body tissues require a constant supply of oxygen, which requires the systemic distribution of oxygenated blood to the tissues at sufficient pressure from the left ventricle of the heart through the aorta and arteries to maintain the transfer of oxygen to the tissues.

Hence, the correct answer is option (B)

Note: Cardiac production is mainly regulated in the body by the oxygen requirement of tissues. The heart, unlike most pump systems, is a demand pump that does not regulate its own output. The metabolically regulated flow through the tissues is increased while the body has a high metabolic oxygen demand, leading to a larger flow of blood back to the heart, leading to higher cardiac output.