Reperfusion rate and inhospital mortality of patients with ST segment elevation myocardial infarction diagnosed already in the prehospital phase: Results of the German Prehospital Myocardial Infarction Registry (PREMIR)

AimsWe sought to evaluate the in-hospital fate of patients with ST segment elevation myocardial infarction (STEMI) diagnosed already in the prehospital phase by physican equipped ambulances.MethodsA total of 2326 consecutive STEMI patients were included in PREMIR. For this analysis 218 patients with prehospital cardiopulmonary resuscitation were excluded.ResultsThe median time between symptom onset and 12-lead ECG was 85 min. The median time intervals between the diagnostic 12-lead ECG and prehospital fibrinolysis were 10 min, until inhospital fibrinolysis 52 min and until primar PCI 86 min, respectively. Reperfusion therapy with prehospital fibrinolysis (24%), inhospital fibrinolysis (13%) or primary PCI (45%) was performed in 82% of the patients. Inhospital mortality was 6.0% in patients with prehospital fibrinolysis (n = 504), 5.8% in patients with inhospital fibrinolysis (n = 278), 4.5% in patients with primary percutaneous coronary intervention (n = 962) and 16.2% in patients without early reperfusion therapy (n = 377), respectively. In the multivariate propensity score analysis comparing prehospital fibrinolysis and primary PCI we observed no significant difference in the odds for in-hospital mortality (odds ratio: 1.57, 95% CI: 0.94–2.63). The final discharge diagnosis was STEMI in 90% of the patients, in patients with prehospital fibrinolysis 95%.ConclusionsIn patients with STEMI already diagnosed in the prehospital phase the ischemic time is short, accuracy of the diagnosis is high and reperfusion therapy is performed in over 82%. Inhospital mortality was not different between prehospital fibrinolysis and primary PCI.