Can you please explain in detail :  is the ventricular afterload a determinant of cardiac performance, or does cardiac performance determine the afterload?

Biomedical Instrumentation Systems
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ISBN:9781133478294
Author:Chatterjee
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Chapter8: Defibrillators And Pacemakers
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Can you please explain in detail :  is the ventricular afterload a determinant of cardiac performance, or does cardiac performance determine the afterload?

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Cardiac Output- This is the process in which blood volume used to ejected by the heart/ unit time.

Cardiac Output usually represented as Stroke Volume× heart rate.

Afterload is one of the primary determinant of cardiac output.

Explanation- Afterload also acts as an important influence on the stroke volume. 

"Stroke volume" is the term used when the volume of blood pumped out of the heart's left ventricle during each systolic cardiac contraction. 

  • Stroke volume used to increase with the rise of contractility for the given value of afterload.
  • On the other hand, when the Afterload increases then, stroke volume tends to decrease. 
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