C-Reactive Protein/metabolism; Endpoint Determination; Myocardial Infarction/blood; Thrombolytic Therapy; Aged; Biomarkers/blood; Death, Sudden, Cardiac/epidemiology; Death, Sudden, Cardiac/etiology; Electrocardiography/drug effects; Female; Fibrinolytic Agents/therapeutic use; Follow-Up Studies; Humans; Male; Middle Aged; Myocardial Infarction/drug therapy; Myocardial Infarction/mortality; Nephelometry and Turbidimetry; Observation; Prognosis; Proportional Hazards Models; Prospective Studies; ROC Curve; Risk Assessment; Risk Factors; Severity of Illness Index; Survival Rate; Thrombolytic Therapy/adverse effects; Thrombolytic Therapy/mortality; Time Factors; Treatment Outcome