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Understanding ACS Definition
- Acute coronary syndrome (ACS) covers unstable angina, NSTEMI, and STEMI but not stable angina.
- Differentiation starts with ECG and the presence of myocardial injury markers like troponin.
Pathophysiology of ACS
- ACS mainly results from atherosclerotic plaque rupture or erosion causing thrombus and myocardial ischemia.
- Ischemia without necrosis appears as unstable angina; necrosis is seen in NSTEMI and STEMI.
Five MI Classifications Explained
- MI is classified into five types; type 1 is classic plaque rupture, type 2 is supply-demand mismatch, and types 3-5 involve special scenarios.
- Recognizing MI types helps understand underlying causes and clinical implications.