Nephrol Dial Transplant (2003) 18: 942-946
© 2003 European Renal Association-European Dialysis and Transplant Association
Cardiac troponin I (2nd generation assay) in chronic haemodialysis patients: prevalence and prognostic value
1 Chemical Laboratory, Aurelia Hospital, Rome, 2 Chair of Nephrology, ‘Tor Vergata’ University, Rome and 3 CICU, Aurelia Hospital, Rome, Italy
Background. Elevated serum cardiac troponin T (cTnT) levels are frequently observed in chronic dialysis patients and have been shown to be associated with increased morbidity and mortality. The aim of this study was to determine whether cardiac troponin I (cTnI), which is less frequently elevated, has similar clinical significance.
Methods. We studied 101 asymptomatic patients with no clinical evidence of coronary artery disease who were undergoing chronic dialytic treatment. We measured their serum cTnI levels immediately before the start of their dialysis sessions by a second-generation assay (OPUS-DADE). Our study included a year-long follow-up with trimestrial cTnI assays as well as clinical, X-ray and echocardiographic surveillance. We considered patients with serum cTnI 
0.15 ng/ml as positive and those with levels <0.15 ng/ml as negative.
Results. Among the 14 patients with high serum cTnI levels, nine (64%) suffered acute cardiac events during the 12-month follow-up. In contrast, among the 72 patients with low cTnI levels only seven (9.7%) had acute events. In another group of 15 patients with variable cTnI levels, three patients (20%) had cardiac events.
Conclusion. Based on these results, serum cTnI appears to be a valuable predictive marker of cardiovascular events in asymptomatic dialysis patients. For those patients who might benefit from thorough cardiac investigation and treatment, information on cTnI could be useful in preventing cardiac events.
Keywords: cardiac troponin I; myocardial injury; renal disease
Correspondence and offprint requests to: Dr Silvia Cipriani, Via Olivella 120, 00041 Albano Laziale, Rome, Italy. Email: silvia.cipriani{at}tiscalinet.it
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