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Is primary PCI superior to thrombolysis in the first hour of STEMI ? Steg PG, Bonnefoy E, Chabaud S, Lapostolle F, Dubien PY, Cristofini P, Leizorovicz A, Touboul P; Comparison of Angioplasty and Prehospital Thrombolysis In acute Myocardial infarction (CAPTIM) Investigators. No, it is not. Read ref 1, 2. Reference 1.
Patient still not having chest pain however this is more concerning for OMI/STEMI. Wellens' syndrome is a syndrome of Transient OMI (old terminology would be transient STEMI). A comparison of electrocardiographic changes during reperfusion of acute myocardial infarction by thrombolysis or percutaneous transluminal coronary angioplasty.
The precordial ST-depression pattern on this ECG (and in this clinical setting) should immediately raise suspicion of Posterior STEMI! Posterior STEMI occurs in approximately 15-20% of acute MI, but the vast majority of the time it is seen in conjunction with inferior (Infero-Posterior) or lateral (Postero-Lateral) STEMI (1).
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. Is it normal STE? The computer thinks so, and the physician thinks that is quite possible. However , there is terminal QRS distortion in lead V3.
His ECG was repeated at this point: This shows a well developed anterior STEMI. To not see these findings is very common, and this patient would be given the diagnosis of NonSTEMI, with subsequent development of STEMI. It is not a missed STEMI, but it is a missed coronary occlusion. The peak troponin I was over 100.
Here is the prehospital ECG, with pain: Hyperacute anterolateral STEMI The medics had activated the cath lab and the patient went for angiogram and had a 95% stenotic LAD with TIMI-3 flow. Type B waves are deeper and symmetric. When the patient had chest pain, prior to nitroglycerine, what do you think the ECG showed ? A stent was placed.
There is clearly sufficient STE for STEMI criteria in leads V2 and aVL, but lead I has less than 1.0 mm of STE - thus, technically this ECG does not meet STEMI criteria, although it is a quite obvious OMI. This ECG was immediatel y discussed with the on-call cardiologist who said the ECG was "concerning but not a STEMI."
See these posts for Wellens' mimics: Pseudo-Wellens' Syndrome due to Left Ventricular Hypertrophy (LVH) Anterior STEMI? It even meets STEMI criteria: 2.5 A comparison of electrocardiographic changes during reperfusion of acute myocardial infarction by thrombolysis or percutaneous transluminal coronary angioplasty.
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