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Old 04-20-2015
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Default cardio questions

Can anybody pls explain,

1. how rapid squatting increases intensity of Aotic stenosis murmer?
2.valsava maneuver increases intensity of hypertrophic cardiopathy murmer but hand grip and rapid squatting decreases its murmer intensity.what is the relation between them. Can anybody pls explain this phenomenon.
3. valsalva maneuver in Mitral valve prolapse gives earlier onset of click/murmer whereas hand grip and rapid squatting gives later onset of later onset of click/murmer. How?

These extracts are taken from the "auscultation of heart", first aid, P. 272 (2014), P278 (2015)

Thanks in advance.
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Old 04-20-2015
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My explanation:

1>Rapid Squatting

Rapid squatting --> Increased Abdominal Pressure --> Increased venous Return due to compression of IVC --> Increased Preload --> Increased Stroke Volume

Now you must remember that Aortic stenosis produces a sound which is crescendo-decrescendo in nature because the sound rises as the pressure inside the Left Ventricle increases and more blood is being pumped in Reapid Squatting if we have to pump out more blood(increased sv) the peak/crest of this sound will be higher thus louder so it increases the murmur intensity of Aortic stenosis

Also check this two threads for 2 and 3:

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