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ST-segment myocardial infarction (STEMI) is caused by thrombotic occlusion of a major coronary artery. Rapid restoration of coronary blood flow is essential in preventing myocardial necrosis. Early reperfusion of the infarct-related artery limits infarct size and improves outcome. Achieving the shortest possible delay between symptom onset and reperfusion is therefore one of the most critical factors in the management of STEMI.
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