Frequency and Cause of Cardiac Troponin T Elevation in Chronic Hemodialysis Patients from Study of Cardiovascular Magnetic Resonance
Journal Title: | The American journal of cardiology 2007, Vol.100 (5), p.885-889 |
Main Author: | deFilippi, Christopher R., MD |
Other Authors: | Thorn, Eric M., MD , Aggarwal, Monica, MD , Joy, Abel, MD , Christenson, Robert H., PhD , Duh, Show-Hong, PhD , Jeudy, Jean, MD , Beache, Garth, MD |
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Publisher: | New York, NY: Elsevier Inc |
ID: | ISSN: 0002-9149 |
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recordid: | cdi_proquest_miscellaneous_68199642 |
title: | Frequency and Cause of Cardiac Troponin T Elevation in Chronic Hemodialysis Patients from Study of Cardiovascular Magnetic Resonance |
format: | Article |
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ispartof: | The American journal of cardiology, 2007, Vol.100 (5), p.885-889 |
description: | Cardiac troponin T level predicts a gradient risk for death in patients using hemodialysis. We used cardiovascular magnetic resonance (CMR) to determine whether an asymptomatic increase of troponin T in patients using hemodialysis is associated with subclinical myocardial infarction (MI). Twenty-six patients using long-term hemodialysis (49 ± 12 years of age, 19 men, 8 diabetics) with left ventricular (LV) ejection fraction >40% and no known coronary artery disease were selected based on a low-risk troponin T level ≤0.03 ng/ml (median 0.02, interquartile range 0.00 to 0.02, n = 13) and high-risk troponin T level ≥0.07 ng/ml (median 0.15, interquartile range 0.09 to 0.19, n = 13). All underwent CMR imaging for LV mass and for MI by late gadolinium enhancement. Between high- and low-risk patients using hemodialysis, there were no differences in age, gender, ethnicity, or diabetes mellitus. Of the high-risk patients, 3 (23%, 95% confidence interval [CI] 5 to 54) had MI by late gadolinium enhancement versus 0 (0%, 95% CI 0 to 25) low-risk patients (p = 0.22). A diffuse, midwall late gadolinium enhancement pattern was seen in 1 high-risk patient (8%) versus 0 low-risk patient (0%, 95% CI 0 to 25, p = 0.97). Height-adjusted LV mass and LV hypertrophy were not significantly different between high-risk (62 ± 26 g/m2.7 , LV hypertrophy, n = 7, 54%) and low-risk (54 ± 20 g/m2.7 , LV hypertrophy, n = 5, 39%) patients (p = 0.37 for LV mass, p = 0.69 for LV hypertrophy). In conclusion, MI detected by CMR is present in few patients on hemodialysis with high troponin T levels and absent in the setting of very low troponin T levels, suggesting that additional myocardial pathologies cause increased troponin T in patients using hemodialysis. |
language: | eng |
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identifier: | ISSN: 0002-9149 |
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