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NBME 20 Answers

nbme20/Block 2/Question#18 (27.5 difficulty score)
A 65-year-old man is brought to the emergency ...
ST-segment elevationπŸ”
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 +6 
submitted by hayayah(1056),
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Tsih anm si wnighso sxs fo an MI.

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charcot_bouchard  May i know where do u read this +1  
mbourne  @hayayah, Although this is a bit outside of the realm of Step 1, I want to clarify a point. Early MI does not typically lead to ST-depression. Early MI will typically present with hyperacute T-waves with straightening of the ST segment, and then evolve towards more familiar "STEMI" morphology. Great image representation of MI EKG changes: https://4.bp.blogspot.com/-_UbS4PvbTZE/Wr0M27TZhUI/AAAAAAAABB0/-M8FSuvTKeEGkx-7HrEd45Fl0phb2-T8gCLcBGAs/s1600/Progression%2Bof%2BACO%2Bfinal_diagram.png ST depression from subendocardial ischemia can occur with supply/demand mismatch --> ISCHEMIA, but not Myocardial INFARCTION. +1  



 +1 
submitted by strugglebus(163),
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ST illw ftrsi rc;dseeea r,woheve eafrt 02 nim it ilwl csreinae e)elv(aet