Remove Aneurysm Remove Echocardiogram Remove Ischemia
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Tachycardia must make you doubt an ACS or STEMI diagnosis; put it all in clinical context

Dr. Smith's ECG Blog

One very useful adjunct is ultrasound: Echo of his heart can distinguish aneurysm from acute MI by presence of diastolic dyskinesis, but it cannot distinguish demand ischemia from ACS. These must raise suspicion of old MI with persistent ST elevation. An angiogram showed no acute coronary lesions.

STEMI 52
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Transient STEMI, serial ECGs prehospital to hospital, all troponins negative (less than 0.04 ng/ml)

Dr. Smith's ECG Blog

The old ECG has a Q-wave with persistent ST elevation in lead III, and some reciprocal ST depression (typical for aneurysm morphology). This is "Persistent ST elevation after previous MI" or "LV aneurysm morphology". LV aneurysm is very different for inferior vs. anterior MI. This is not pericarditis because: a.

STEMI 52
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QS-wave in V2: 2 cases, different paradigms lead to different treatment times (STEMI - NSTEMI vs. OMI - NOMI)

Dr. Smith's ECG Blog

Prior ECG available on file from 2 months before: We do not know the clinical events happening during this ECG, but there is borderline tachycardia, PVCs, and likely some evidence of subendocardial ischemia with small STDs maximal in V5-6/II, slight reciprocal STE in aVR. QS waves from V2-V5 consistent with LV aneurysm morphology.

STEMI 52
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A young patient with diminishing pain with a subtle but diagnostic ECG.

Dr. Smith's ECG Blog

Next day echocardiogram showed inferolateral hypokinesia with an EF of %45-50. On echocardiogram you will not see a "posterior" hypokinesia (will see "inferolateral") and, as in this case, LCx may not give the blood supply of basal inferior segment (formerly called "posterior"). The patient recovered well. J Am Heart Assoc. 121.022866.

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What happens when a patient with LAD OMI does not go immediately to the cath lab?

Dr. Smith's ECG Blog

You might think it is "Old MI with persistent ST Elevation" (otherwise known as "LV aneurysm" morphology.") That is a reasonable thought, but we have shown that if there is one lead of V1-V4 with a T/QRS ratio greater than 0.36, then it is STEMI, not LV aneurysm. Pain will resolve with completed infarct or with resolution of ischemia.

STEMI 52
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Emergency Department Syncope Workup: After H and P, ECG is the Only Test Required for Every Patient.

Dr. Smith's ECG Blog

Look for Vascular Etiology -- think of these while doing H and P: --Bleeding: ruptured AAA, GI bleed, ruptured ectopic pregnancy, other spontaneous bleed such as mesenteric aneurysms. Evidence of acute ischemia (may be subtle) vii. ST segment and T wave abnormalities consistent with or possibly related to myocardial ischemia.