Step I Another UW booboo?

[tony montana]

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In one of their explanations they say:

For a fixed anatomical degree of mitral valve incompetence producing mitral regurgitation and at a given left ventricular preload, an increase in contractility would tend to increase LV afterload.


Maybe I forgot all my physiology, but I can't even find one source that explains why an increases in contractility -> increase in afterload 😕

 

[SOUNDMAN]

In one of their explanations they say:

For a fixed anatomical degree of mitral valve incompetence producing mitral regurgitation and at a given left ventricular preload, an increase in contractility would tend to increase LV afterload.



Maybe I forgot all my physiology, but I can't even find one source that explains why an increases in contractility -> increase in afterload 😕

Increased Stroke Volume d/t the increased contractility, you are essentially getting more blood out each contraction with the increased contractility. Wouldn't that increase your afterload? It doesn't sound like an error to me.

 

[Blesbok]

Increased contractility increases the force of the stroke, which increases your stroke volume and increases your afterload/systolic BP at a given preload.