trials are under way to determine whether patients with shorter pain duration , transient st-segment changes ( ie , unstable angina patients ) , chest pain associated with st-segment depressions or t-wave inversions ( ie , non-q-wave infarction patients ) , or patients whose pain began more than 4 to 6 h earlier will benefit from early thrombolytic therapy .
C0008031
chest pain
C0030193
pain