- Unstable angina due to partial coronary artery occlusion.
- Prinzmetal's angina due to coronary artery spasm.
- Myocardial infarction due to prolonged ischemia and myocardial cell necrosis.
- Pericarditis due to inflammation of the pericardium.
1. A 68-year-old male presents to the ED with acute onset of crushing substernal chest pain radiating to his left arm, diaphoresis, and shortness of breath. His ECG shows ST-segment elevation in leads II, III, and aVF. What is the critical underlying pathophysiological event?
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