Performance of the thrombolysis in myocardial infarction risk index in the National Registry of Myocardial Infarction-3 and -4

We sought to evaluate a simple risk index based on age and vital signs in a community sample of patients with ST-segment elevation myocardial infarction (STEMI). A simple risk index based on age and vital signs (heart rate × [age/10]2/systolic blood pressure) developed from patients with STEMI accurately predicts mortality in clinical trials of fibrinolysis. The application of such a tool in an unselected population is necessary to evaluate its...