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The patient was discharged with a diagnosis of acute pericarditis — and treated with a full course of colchicine and ibuprofen. The ultimate discharge diagnosis was acute pericarditis. ( From the information provided — I would not make the diagnosis of acute pericarditis. Figure-1: The initial ECG in today's case.
The computer interpretation was “ST elevation, consider early repolarization, pericarditis or injury.” The final cardiology interpretation confirmed the computer interpretation of “ST elevation, consider early repolarization, pericarditis or injury”. A healthy 45-year-old female presented with chest pain, with normal vitals.
Clinician and EKG machine read of acute pericarditis. While it is true that inferior MI has ST depression in aVL 99% of the time (Bischof and Smith), and that inferolateral ST elevation is the most common distribution for pericarditis, the ST elevation in V3 has "terminal QRS distortion (TQRSD)," (diagnostic of LAD occlusion).
Below is the first ECG, signed off by the over-reading cardiologist agreeing with the computer interpretation: ST elevation, consider early repolarization, pericarditis, or injury. Theres ST elevation in V3-4 which meets STEMI criteria, which could be present in either early repolarization, pericarditis or injury.
06:44 - T-waves in V2 are smaller now - Overall resolution of prior findings (which qualifies as a dynamic change) The initial note by the cardiologist states that the presentation is more consistent with pericarditis. Remember, pericarditis is the thing you say and write down when youre actively trying to miss an OMI.
Here they are: Patient 1, ECG1: Zoll computer algorithm stated: " STEMI , Anterior Infarct" Patient 2, ECG1: Zoll computer algorithm stated: "ST elevation, probably benign early repolarization." He diagnosed anterior "STEMI" and activated the cath lab. 25 minutes later, EMS called back with this new ECG: Super obvious STEMI(+) OMI.
PR depression, which suggests pericarditis 4. We also showed that, of 47 cases of pericarditis with ST elevation, none had ST depression in aVL. ) Exclusion criteria were age less than 18, SBP less than 100 mmHg, echocardiogram with EF less than 50%, STEMI, pregnancy, and trauma. Absence of any ST depression in aVL. (
Smith : there is some minimal ST elevation in V2-V6, but does not meet STEMI criteria. Transient STEMI has been studied and many of these patients will re-occlude in the middle of the night. Eur Heart J 2018. Is it normal STE? The computer thinks so, and the physician thinks that is quite possible. The S-wave is reconstituted.
So Shark Fin really is just a dramatic representation of STEMI, and can be in any coronary distribution. So this is STEMI, right? Well, don't we see diffuse ST Elevation in Myo-pericarditis (with STD in aVR)? It is often confused with a wide QRS due to conditions such as hyperkalemia. Which artery? Could this be myopericarditis?
Note: according to the STEMI paradigm these ECGs are easy, but in reality they are difficult. Theres inferior STE which meets STEMI criteria, but this is in the context of tall R waves (18mm) and relatively small T waves, and the STD/TWI in aVL is concordant to the negative QRS. This was false positive STEMI with an ECG mimicking OMI.
.: 50% of LAD STEMI have Q-waves by one hour. The exception is with postinfarction pericarditis , in which a completed transmural infarct results in inflammation of the subepicardial myocardium and STE in the distribution of the infarct, and which results in increased STE and large upright T-waves. So it is not necessarily subacute.
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