What is cardiac output, and how is it calculated?

Question

Accepted Answer

Hello everyone and welcome to today's video. So if we need to identify the incorrect statement about cardiac output. Now, as answer choice A we have it is a measure of how much blood the heart pumps in one minute. B, it is calculated by multiplying stroke volume by heart rate. C, an increase in cardiac output reduces blood pressure and D for a non or for a normal non aid. It is about 5000 mL per minute. Now, in order to solve this problem, we need to understand that cardiac output or CEO is going to be the amount of blood pumped by the heart in one minute knowing this, let's go over each of our answer choices so that we may solve the problem. First of all, we have a, it is a measure of how much blood the heart pumps in one minute. This is going to be a true statement according to what we just wrote down here. So we're going to cancel it out. Then we have B it is calculated by multiplying stroke volume by heart rate. This is going to also be a true statement or heart rate multiplied by stroke volume. Is going to be yielding these cardiac output, this volume of blood pumped by the heart in one minute. Therefore, we can also cancel this out. Then we have the for normal non athlete, it is about 5000 mL per minute. This is a true statement as well per minute. We pump out about 5000 mL of blood. Therefore, we can cancel this out and then we have an increase in cardiac output, reduces blood pressure. When I want you to think about this for a second, if we have an increase in cardiac output, this means that there is going to be a lot more blood being pumped into our arteries per minute. If we have a lot more blood being pumped into these blood vessels, the pressure of the blood vessels is going to increase. Now, if the pressure of the blood vessels is increasing, then this is going to make this statement incorrect because it is stated that an increase in cardiac output reduces the blood pressure. So this is an incorrect statement. Therefore, we can highlight answer choice c an increase in cardiac output reduces the blood pressure as the final answer to this question. I really hope this video helped you and I hope to see you on the next one.

What is cardiac output, and how is it calculated?

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Key Concepts

Cardiac Output

Stroke Volume

Heart Rate