The Ewha Medical Journal
Ewha Womans University School of Medicine
Original Article

Evaluation of Cardiac Troponin T Elevation in Patients with Chronic Renal Failure Undergoing Dialysis

Chae Lim Jung, Ki Sook Hong
Corresponding author: (kshong@ewha.ac.kr)

Copyright ⓒ 2010. Ewha Womans University School of Medicine. This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Published Online: Sep 30, 2010

Abstract

Objectives

Cardiac troponin T(cTnT) levels are elevated in patients with chronic renal fail-ure(CRF) with dialysis which represent myocardial damage. But the cut-off levels were different in laboratories and clinical physicians. We conducted a study to find out the cut-off levels of acute myocardial infarction(AMI), ischemic heart disease(IHD), and cardiovascular disease (CVD) in CRF patients with dialysis and prognostic aspect according to cTnT levels.

Methods

Cardiac troponin T(cTnT) of total 98 patients(men 43, women 55, mean age 60.4±13.0 years) was reviewed the diagnosis and progress for 3 years by the medical records. Serum cTnT by Elecsys 2010(Roche diagnostics, Germany), the 4th generation assay was performed.

Results

Mean cTnT level of total 98 patients was 0.26ng/mL and the patients with CVD were 59(60.2%) and their cTnT level was 0.41 ng/mL. The mean levels of cTnT in AMI, IHD, and CVD were 1.10, 0.52, and 0.41 ng/mL, respectively. cTnT, CK, CK-MB, and glucose were increased according to severity of cardiovascular disease. The cut-off levels of cTnT in AMI, IHD, and CVD was 0.10, 0.07 and 0.06 ng/mL. The sensitivity and specificity of AMI, IHD, and CVD in each cut-off level were 88.2/71.6%, 76.2/71.4%, and 81.4/71.8%, respectively. The survival rate above cTnT 0.1 ng/mL during 3 years was significantly decreased(p<0.001) than less than 0.1 ng/mL.

Conclusion

The degree of cTnT elevation in CRF patients with dialysis represents severity of cardiovascular disease and poor survival rate.

Keywords: cTnT; CRF; Dialysis; Survival rate