Had a realization about quiet heart sounds that came about a decade late.
Short thread.
1/4
Short thread.
1/4
Ok.
S1 and S2 happen when pressure gradients snap them shut. Right-sided cardiac pressures and thus valve-closing pressure gradients are lower, this P2 is quieter than A2.
And if you get pulmonary hypertension, P2 gets louder.
A bit more from UpToDate:
2/4
S1 and S2 happen when pressure gradients snap them shut. Right-sided cardiac pressures and thus valve-closing pressure gradients are lower, this P2 is quieter than A2.
And if you get pulmonary hypertension, P2 gets louder.
A bit more from UpToDate:
2/4
What about hypOtension? If you’re septic or bleeding or in cardiogenic shock, the lower pressure gradients should translate to quieter sounds.
Thus, quiet heart sounds in this setting are probably less discerning for pericardial fluid.
3/4
Thus, quiet heart sounds in this setting are probably less discerning for pericardial fluid.
3/4
I couldn’t find anything describing frequency or test characteristics on a few search attempts. If anyone know of any studies, please comment!
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4/4
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