Cardiac Troponin After Percutaneous Coronary Intervention and 1-Year Mortality in Non-ST-Segment Elevation Acute Coronary Syndrome Using Systematic Evaluation of Biomarker Trends JOURNAL OF THE AMERICAN COLLEGE OF CARDIOLOGY Tricoci, P., Leonardi, S., White, J., White, H. D., Armstrong, P. W., Montalescot, G., Giugliano, R. P., Gibson, C. M., Van de Werf, F., Califf, R. M., Harrington, R. A., Braunwald, E., Mahaffey, K. W., Newby, L. K. 2013; 62 (3): 242-251


OBJECTIVES: We reviewed cardiac troponin (cTn) trends during non-ST-segment elevation acute coronary syndrome (NSTE ACS) in patients undergoing percutaneous coronary intervention (PCI) in EARLY ACS and SYNERGY and studied the relationship between post-PCI cTn and mortality. BACKGROUND: The prognostic value of cTn post-PCI is controversial. In patients with NSTE ACS, it is especially difficult to distinguish between cTn elevations due to PCI or index myocardial infarction (MI). METHODS: Time and cTn (indexed by upper limit of normal [ULN]) data pairs were plotted for 10,199 patients and independently reviewed by 2 physicians to identify patients in whom post-PCI cTn elevation could be distinguished from that of index MI. Post-PCI cTn peak was identified for each plot, and its relationship with 1-year mortality was evaluated using Cox modeling, correcting for 15 clinical variables from the EARLY ACS 1-year mortality model (including baseline cTn). We used an identical methodology to assess the association between creatine kinase-MB (CK-MB) and 1-year mortality. RESULTS: Patients with cTn (re)elevation post-PCI not evaluable were identified and excluded from further analysis (4198 [41%] with cTn rising prior to PCI; 229 [2%] with missing cTn). Among the remainder (N=5772 [57%]), in the multivariable model, peak cTn post-PCI was associated with a 7% increase in mortality (hazard ratio [HR] for 10x ULN increase, 1.07; 95% confidence interval [CI], 1.02-1.11; p=0.0038). Peak post-PCI CK-MB was significantly associated with 1-year mortality (HR for 1x ULN increase, 1.13; 95% CI, 1.05-1.21; p=0.0013). CONCLUSIONS: We used a methodology that differentiated post-PCI cTn (re)elevation from that of presenting MI in more than half of patients with NSTE ACS undergoing PCI. This identified a highly significant relationship between post-PCI cTn and 1-year mortality, with implication for both incorporating a cTn post-PCI MI definition and preventing PCI-related myonecrosis.

View details for DOI 10.1016/j.jacc.2013.04.043

View details for Web of Science ID 000321695500011

View details for PubMedID 23684676