The San Diego County Office of Emergency Services (OES) has certified Tri-City Medical Center as a STEMI Receiving Center for heart attack treatment because the hospital meets aggressive treatment standards that produce good outcomes. STEMI, or ST Elevation Myocardial Infarction, represents the most severe type of heart attack. With an average time of 76 minutes to stent placement, Tri-City patients are receiving definitive care 60 minutes faster than the national average!