# Cardiac Output (Nursing)

by Jasmine Clark

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Slides Nursing Physiology Cardiovascular System Heart.pdf
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00:01 So now let's look at what the blood in the heart is actually doing.

00:06 So cardiac output is the volume of blood that is pumped by each ventricle in one minute.

00:13 Normally this volume is about 5.25 liters per minute.

00:20 We measure cardiac output by measuring the heart rate and multiplying it by the stroke volume.

00:28 The heart rate is the number of heartbeats per minute and the stroke volume is the volume of blood that is pumped out by the ventricle with each heartbeat.

00:42 So how do we regulate this? Maximum cardiac output is usually 4 to 5 times that of resting cardiac output in a non-athletic person.

00:55 However, in some trained athletes, our maximum cardiac output can go up to as much as 35 liters per minute.

01:06 Also in the heart, we have something called the cardiac reserve.

01:11 This is the difference between a resting cardiac output and the maximal cardiac output of an individual.

01:20 Our cardiac output is going to change if either the stroke volume or the heart rate change.

01:27 Remember, it's the stroke volume times at heart rate so if either one of those changes whether it be up or down, that is going to affect your cardiac output.

01:40 Cardiac output is going to be affected by factors that lead to the regulation of stroke volume as well as the regulation of our heart rate.

The lecture Cardiac Output (Nursing) by Jasmine Clark is from the course Cardiovascular System: Heart – Physiology (Nursing).

### Included Quiz Questions

1. The volume of blood pumped by each ventricle in 1 minute
2. The volume of blood pumped by each atrium in 1 minute
3. The volume of blood going through the valves at any given time
4. The volume of blood circulating through the heart in 1 minute
1. CO = heart rate x stroke volume
2. CO = heart rate x afterload
3. CO = stroke volume - preload
4. CO = heart rate - stroke volume

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