Understanding Heart Attack Types: STEMI, NSTEMI & More
"Type heart attack" is not a medical term. Acute coronary syndromes are classified by ECG and biomarkers:
Classification
- STEMI (ST-Elevation Myocardial Infarction): Complete coronary occlusion; ST elevation on ECG; requires immediate reperfusion (PCI or fibrinolysis).
- NSTEMI (Non-ST-Elevation MI): Partial occlusion; troponin elevated, no ST elevation (may have ST depression/T-wave changes); urgent angiography within 24–72 hrs.
- Unstable Angina: Ischemic symptoms at rest/minimal exertion; troponin negative; high risk for MI.
- Type 2 MI: Supply-demand mismatch (e.g., anemia, tachycardia, hypotension) without plaque rupture.
- MINOCA: MI with non-obstructive coronary arteries (spasm, embolism, dissection).
Action: Any chest discomfort >10 min, especially with diaphoresis, dyspnea, nausea – call emergency services immediately. Do not self-diagnose.
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