Step I Aortic Stenosis afterload

[aspiringmd1015]

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UW states that w/an increase in afterload(handgrip) the murmur decreases, bc of the decreased pressure gradient as in AS the LVP is much higher than the aortic pressure, so w/ an increase in afterload, and a decrease in murmur, that owuld mean bc the pressure gradient is less, less BF would flow across the valve and thus less sound?

 

[pathologyDO]

That's how I'd interpret it, more resistance to flow and of course that means less blood flowing through to cause a murmur