Explain intensity of heart sound, Biology

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Explain Intensity of heart sound?

Intensity of S 1, particularly M 1 depends on the position of the bellies of mitral leafets when the LV begins to contract since S 1 is loudest when the mitral leaflets are maximum recessed into the LV cavity at the onset of LV contraction as in the short PR interval, tachycardia or MS with mobile anterior leaflet.


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