Cardiac troponin T and end stage renal disease
Alaa-Eldin M Gabr1, Ibrahim A Ibrahim, Shaza M Aloulou
1Department of Internal Medicine, King Fahd Specialist Hospital, PO Box 2290, Buraidah, Kingdom of Saudi Arabia. souhad2000@hotmail.com
Insights
Serum cardiac troponin T (cTnT) levels may be altered by hemodialysis in end-stage renal disease (ESRD) patients. Elevated cTnT is a specific marker for subclinical myocardial damage in ESRD patients undergoing dialysis.
Area of Science:
- Cardiology
- Nephrology
- Clinical Biochemistry
Background:
- End-stage renal disease (ESRD) patients on chronic hemodialysis (HD) have a high prevalence of ischemic heart disease (IHD).
- Accurate assessment of cardiac damage in ESRD patients is challenging due to various confounding factors.
Purpose of the Study:
- To investigate the relationship between serum cardiac troponin T (cTnT) and other cardiac markers and IHD in ESRD patients on chronic HD.
- To determine the specificity of cTnT as a biochemical marker for subclinical myocardial damage in this population.
Main Methods:
- Serum cTnT levels were measured in 73 ESRD patients undergoing chronic HD using the Elecsys 2020 immunoassay system.
- Patients were categorized into groups based on history of IHD, diabetes, or both, and controls without evidence of myocardial damage.
- cTnT concentrations were analyzed in pre- and post-hemodialysis samples.
Main Results:
- Elevated cTnT levels (>=0.1 ug/L) were observed in 58% of HD patients.
- Increased cTnT was noted in 53% of diabetic patients, 37% of IHD patients, 59% of patients with both diabetes and IHD, and 29% of controls.
- cTnT levels were more frequently elevated in post-hemodialysis samples (21%) compared to pre-hemodialysis samples (13%).
Conclusions:
- Hemodialysis may influence measured cTnT concentrations in ESRD patients.
- Elevated cTnT, whether sporadic or persistent, appears to be a specific biochemical marker for predicting subclinical myocardial damage in ESRD patients.
Objective:
The aim of this study is to investigate the relationship between serum concentration of cardiac troponin T (cTnT) and other cardiac markers and ischemic heart disease (IHD) in end stage renal disease (ESRD) patients on chronic hemodialysis (HD).
Methods:
This study was carried out at King Fahd Specialist Hospital, Buraidah, Kingdom of Saudi Arabia from July 2002 to September 2003. Cardiac troponin T was measured using Elecsys 2020 immunoassay system, a method that is specific for cTnT. The analytical range of cTnT assay was 0.01-25.0 ug/L. Seventy-three patients were divided into 4 groups: 20 patients with history of IHD, 17 patients with diabetes, 19 patients with diabetes and IHD and 17 patients without evidence of myocardial damage.
Results:
Cardiac troponin T concentrations were > or =0.1 ug/L in 58% of HD patients. Fifty-three percent of diabetic patients had an increased cTnT, 37% of IHD patients had an increased cTnT, 59% of IHD and diabetic patients had an increased cTnT and 29% of noncardiac disease patients had an increased cTnT. Cardiac troponin T was increased more frequently in post-hemodialysis samples (13% pre-hemodialysis and 21% post-hemodialysis).
Conclusion:
Dialysis may alter measured cTnT concentrations in ESRD patients undergoing chronic dialysis. Sporadic or persistently increased cTnT appear to be the most specific of the currently available biochemical markers to predict subclinical myocardial damage in ESRD patients.
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