subendocardial infarction Vs transmural infartion - USMLE Forums
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Old 03-13-2012
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Heart subendocardial infarction Vs transmural infartion

can anybody tell me how do we differentiate between subendocardial infarction and transmural infarction?
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Old 03-13-2012
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on ecg - subendocardial - ST depression¨
transmural - depending on the stage - ST elevation , and it ends with Q wave.
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but prinzmetal angina also produces ST elevation
and are q waves specific for transmural infarction?
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Old 03-13-2012
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Prinzmetal angina is transient... To differentiate from ST elev-MI you'll need to see the whole clinical picture and not just the ECGs.
Myocardial infarction -> persistent chest pain + cardiac enzymes + ST elev.

Q waves are not specific. It only means that the patient may have had M.I. before or recently had one... If you mean if it can be used to differentiate transmural vs subendocardial M.I., I don't think so...
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To add to d wiqeds posts...if you have a q wave WITH st elevation then your Mi is 24-48 hours....after 2 wks you will only have a q wave (old mi)
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