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Venous return w/ inspiration

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sharklasers

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I just want to make sure that venous return increases with inspiration.

And so mitral regurgitation increases with inspiration.
And mitral valve prolapse and HOCM murmur decreases with inspiration.

Is this correct?
 

Ycut

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I just want to make sure that venous return increases with inspiration.

And so mitral regurgitation increases with inspiration.
And mitral valve prolapse and HOCM murmur decreases with inspiration.

Is this correct?

Right sided murmurs increase with inspiration
 

sharklasers

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Or inspiration increases RA return, and expiration increases LA return.

So expiration would worsen MR, but make MVP and the murmur of HOCM better?
 

Stellar Clouds

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Venous return increases with inspiration, but the only useful ausculatory change is that right sided heart murmurs increase with inspiration (and of course splitting of S2). You need more physiologic changes to effect left sided murmurs (MR/MVP/HOCM/AS/AI) such as changes in LV size, systemic vascular resistance, etc.
 

Ycut

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Or inspiration increases RA return, and expiration increases LA return.

So expiration would worsen MR, but make MVP and the murmur of HOCM better?

Inspiration increases flow to lungs therefore can be used to differentiate right sided murmurs from left sided murmurs
Whatever increases blood volume in left ventricle worsens MR and decreases murmur of hocm and moves mvp click near S2
 

FIREitUP

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So MR and MVP don't have anything to do with inspiration?

increasing TPR by squatting or something would increase the sound of mitral regurg, whereas with MVP you would want to decrease venous return to the heart by standing up, which would increase the sound of a MVP murmur, as per First Aid
 
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