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Watch what happens when "pericarditis" and morphine cloud your judgment

Dr. Smith's ECG Blog

Submitted and written by Alex Bracey with edits by Pendell Meyers and Steve Smith Case A 50ish year old man with a history of CAD w/ prior LAD MI s/p LAD stenting presented to the ED with chest pain similar to his prior MI, but worse. Remember, pericarditis is the thing you say and write down when youre actively trying to miss an OMI.

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Quiz post: two patients with chest pain. Do either, both, or neither have OMI?

Dr. Smith's ECG Blog

His disease included 70% prox LAD, 80% distal LAD, 10% in-stent stenosis in the distal LCX, 70% OM1, 70% OM2, and 60% prox RCA. Triage ECG: It was interpreted as lateral STEMI, and he was sent to the cath lab, where the angiogram showed unchanged CAD from known prior, with no acute culprit. Three troponins were undetectable.

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Three prehospital ECGs in patients with chest pain

Dr. Smith's ECG Blog

These latter findings are typical of pericarditis, but pericarditis never has reciprocal ST depression. This led to immediate cath lab activation — which revealed total occlusion of a large 1st diagonal branch that was stented. == Below is the ECG of Patient #3 — recorded from a 35-year old man with sudden, new-onset CP.

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Initial Reperfusion T-waves, Followed by Pseudonormalization. Diagnosis?

Dr. Smith's ECG Blog

It was treated with and dual "kissing balloons" and drug eluting stents. Here is the post stent ECG: There is greater than 50% resolution of ST elevation (all but diagnostic of successful reperfusion) and Terminal T-wave inversion (also highly suggestive of successful reperfusion). Myocardial Rupture and Postinfarction Pericarditis.

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Occlusion myocardial infarction is a clinical diagnosis

Dr. Smith's ECG Blog

Recall from this post referencing this study that "reciprocal STD in aVL is highly sensitive for inferior OMI (far better than STEMI criteria) and excludes pericarditis, but is not specific for OMI." Here is the angiogram after stent placement. Is there anything else on the tracing to corroborate inferior OMI? link] Bischof, J.

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What is lurking underneath this new right bundle branch block?

Dr. Smith's ECG Blog

On day 3 of hospitalization she underwent coronary angiography, revealing a 95% lesion in the mid-LAD which was stented. Repeat ECG the next morning: Resolution of findings above, as well as new deep T-wave inversions in V3-V6 and inferior leads, consistent with reperfusion.

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Is this ECG diagnostic of coronary occlusion? Also: Inferior de Winter's T-waves on prehospital ECG??

Dr. Smith's ECG Blog

Both were stented. In patients with suspicion of acute MI who have any ST elevation, aVL is also a very useful lead to differentiate between pericarditis and MI. Among 49 patients with pericarditis who had inferior ST elevation, zero of 49 had ST depression in aVL (though there are always rare exceptions such as this case ).