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Upon arrival to the emergency department, a senior emergency physician looked at the ECG and said "Nothing too exciting."

Dr. Smith's ECG Blog

The fire department, who operate at an EMT level in this municipality, arrived before us and administered 324 mg of baby aspirin to the patient due to concern for ACS. Such cases are classified as MINOCA (Myocardial Infarction with Non-Obstructed Coronary Arteries). An angiogram is a "lumenogram;" most plaque is EXTRALUMINAL!!

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50 year old with acute chest pain, with ‘normal’ ECG and falling troponin

Dr. Smith's ECG Blog

But STEMI criteria has poor sensitivity for acute coronary occlusion. Like the initial hemoglobin level in acute hemorrhage, the initial troponin in acute coronary occlusion can be falsely reassuring. In the STEMI paradigm, patients with ischemic symptoms and ECGs that don’t meet STEMI criteria get serial ECGs.

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