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A 33-year-old member asked:

how is decreased cardiac output caused by increased fluid volume and decreased fluid volume?

3 doctor answers4 doctors weighed in
Dr. Rajat Jhanjee
Cardiology 20 years experience
Stroke volume: Cardiac output is determined by heart rate and volume of blood pumped by heart in each heartbeat (stroke volume). Increased fluid volume increases the stroke volume and therefore cardiac output. Decreased fluid volume decreases the stroke volume and therefore cardiac output.
Dr. John Breinholt
Pediatric Cardiology 21 years experience
CO explained: Cardiac output is the amount of blood your heart pumps, measures in liters per minute. If it is decreased it means the heart is unable to pump as strongly as it should. That means the heart can't keep up with the volume returning to it.
Dr. Charles Talakkottur
Internal Medicine 61 years experience
You have it reverse: Heart rate x stroke volume = cardiac output and thus if stroke volume decreases, cardiac output decreases or if heart rate decreases cardiac output decreases.

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A 34-year-old member asked:

How can decreased cardiac output be caused by either increased fluid volume and decreased fluid volume?

1 doctor answer1 doctor weighed in
Dr. Calvin Weisberger
Cardiology 51 years experience
Cardiac output: When systolic dysfunction is present, volume overloading can result in decreased stroke volume and cardiac output. In any cardiac status, decreased intravascular volume will result in decreased cardiac output.

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