What is the difference between NSTEMI and UA?
NSTE-ACS can be further subdivided on the basis of cardiac biomarkers of necrosis (eg, cardiac troponin). If cardiac biomarkers are elevated and the clinical context is appropriate, the patient is considered to have NSTEMI; otherwise, the patient is deemed to have UA. ST depression, transient ST-elevation, and/or prominent T-wave inversions may be present but are not required for a diagnosis of NSTEMI. Abnormalities on the ECG and elevated troponins in isolation are insufficient to make the diagnosis of ACS but must be interpreted in the appropriate clinical context. Thus, UA and NSTEMI are closely related conditions whose pathogenesis and clinical presentations are similar but vary in severity. 