Remove Coronary Artery Bypass Graft Remove Pericarditis Remove Research
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Opiate overdose, without chest pain or shortness of breath. Cognitive dissonance.

Dr. Smith's ECG Blog

Of course this depends on many factors: 1) duration of occlusion, 2) whether full or near occlusion with zero flow or some flow -- the flow in the artery is the critical factor, measured by "TIMI" flow, 3) presence of collateral circulation and others. Pericarditis would be even more unlikely in someone without chest pain.