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NBME 15 Answers

nbme15/Block 2/Question#26

A 47-year-old man is admitted to the hospital for ...

Increased pulmonary capillary pressure

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Acute MI and mitral regurg (from the murmur) leads to LV failure and backflow of blood into the lungs.

This leads to increased pulmonary hydrostatic capillary pressure. This will lead to excess volume leaking from the pulmonary capillaries into the interstitial and this will manifest as pulmonary edema (crackles).

Pulmonary edema will interfere with gas exchange leading to hypoxemia.