A practical approach with outcome for the prognostic assessment of non-ST-segment elevation chest pain and normal troponin

Patients with non–ST-elevation chest pain constitute a heterogeneous population. Our aim is to compare the outcome of patients with chest pain, non–ST-segment deviation, and normal troponin, categorized using a risk score, with that of patients with ST depression or troponin increase. A total of 1,449 patients with non–ST-elevation chest pain were evaluated. A validated risk score (using pain characteristics and risk factors) was applied to patients without ST depression or troponin increase. Accordingly, 4 risk categories were defined: group 1, no troponin increase, no ST depression, and risk score