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What are the key features of acute MI presentation?
Acute MI - High-Yield Presentation Features:

Classic Symptoms:
• Chest pain (crushing, substernal, radiating to left arm/jaw)
• Diaphoresis, nausea, dyspnea
• May be atypical in elderly, diabetics, women

ECG Changes:
• ST elevation (STEMI) or depression (NSTEMI)
• New Q waves indicate transmural infarction

Cardiac Biomarkers:
• Troponin I/T (most specific, rises 3-6h, peaks 12-24h)
• CK-MB (rises 4-8h, normalizes 48-72h)
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