Troponin elevations may persist for up to 14 days or occasionally longer. There is a paucity of guidelines for establishment of reinfarction during the acute infarct period on the basis of troponin measurements. References suggest that an increase of >20% of previous troponin levels or an absolute increase of high-sensitivity cardiac troponin T values (eg, >7 ng/L over 2 hours) may indicate reinfarction.183 185 During pregnancy, troponin values are within the normal range in the absence of cardiovascular morbidities. There is controversy as to whether troponin levels are elevated in pre- eclampsia, eclampsia, or gestational hypertension.186 189 When present, cardiac troponin elevations reflect myocardial necrosis. Point-of-care troponin values may provide initial diagnostic information, although their sensitivity is substantially below that of central laboratory methods.154,155,190 192 In addition, the rigorous quantitative assay standardization needed for routine diagnosis favors central laboratory testing. Troponin elevations convey prognostic assessment beyond that of clinical information, the initial ECG, and the predischarge In addition, troponin elevations may provide infor- mationtodirecttherapy.Patientswithcardiactroponinelevations Table 5. 