Sensitive Troponins - Which Suits Better for Hemodialysis Patients? Associated Factors and Prediction of Mortality

TY - JOUR

T1 - Sensitive Troponins - Which Suits Better for Hemodialysis Patients? Associated Factors and Prediction of Mortality

AU - Artunc, Ferruh

AU - Mueller, Christian

AU - Breidthardt, Tobias

AU - Twerenbold, Raphael

AU - Peter, Andreas

AU - Thamer, Claus

AU - Weyrich, Peter

AU - Haering, Hans Ulrich

AU - Friedrich, Bjoern

PY - 2012/10/15

Y1 - 2012/10/15

N2 - Background: In hemodialysis patients, elevated plasma troponin concentrations are a common finding that has even increased with the advent of newly developed sensitive assays. However, the interpretation and relevance of this is still under debate. Methods: In this cross-sectional study, we analyzed plasma concentrations of sensitive troponin I (TnI) and troponin T (TnT) in stable ambulatory hemodialysis patients (n = 239) and investigated their associations with clinical factors and mortality. Results: In all of the enrolled patients, plasma TnI or TnT was detectable at a median concentration of 14 pg/ml (interquartile range: 7-29) using the Siemens TnI ultra assay and 49 pg/ml (31-74) using the Roche Elecsys high sensitive TnT assay. Markedly more patients exceeded the 99th percentile for TnT than for TnI (95% vs. 14%, p<0.0001). In a multivariate linear regression model, TnT was independently associated with age, gender, systolic dysfunction, time on dialysis, residual diuresis and systolic blood pressure, whereas TnI was independently associated with age, systolic dysfunction, pulse pressure, time on dialysis and duration of a HD session. During a follow-up period of nearly two years, TnT concentration above 38 pg/mL was associated with a 5-fold risk of death, whereas elevation of TnI had a gradual association to mortality. Conclusion: In hemodialysis patients, elevations of plasma troponin concentrations are explained by cardiac function and dialysis-related parameters, which contribute to cardiac strain. Both are highly predictive of increased risk of death.

AB - Background: In hemodialysis patients, elevated plasma troponin concentrations are a common finding that has even increased with the advent of newly developed sensitive assays. However, the interpretation and relevance of this is still under debate. Methods: In this cross-sectional study, we analyzed plasma concentrations of sensitive troponin I (TnI) and troponin T (TnT) in stable ambulatory hemodialysis patients (n = 239) and investigated their associations with clinical factors and mortality. Results: In all of the enrolled patients, plasma TnI or TnT was detectable at a median concentration of 14 pg/ml (interquartile range: 7-29) using the Siemens TnI ultra assay and 49 pg/ml (31-74) using the Roche Elecsys high sensitive TnT assay. Markedly more patients exceeded the 99th percentile for TnT than for TnI (95% vs. 14%, p<0.0001). In a multivariate linear regression model, TnT was independently associated with age, gender, systolic dysfunction, time on dialysis, residual diuresis and systolic blood pressure, whereas TnI was independently associated with age, systolic dysfunction, pulse pressure, time on dialysis and duration of a HD session. During a follow-up period of nearly two years, TnT concentration above 38 pg/mL was associated with a 5-fold risk of death, whereas elevation of TnI had a gradual association to mortality. Conclusion: In hemodialysis patients, elevations of plasma troponin concentrations are explained by cardiac function and dialysis-related parameters, which contribute to cardiac strain. Both are highly predictive of increased risk of death.

UR - http://www.scopus.com/inward/record.url?scp=84867535122&partnerID=8YFLogxK

U2 - 10.1371/journal.pone.0047610

DO - 10.1371/journal.pone.0047610

M3 - SCORING: Journal article

C2 - 23077650

AN - SCOPUS:84867535122

VL - 7

JO - PLOS ONE

JF - PLOS ONE

SN - 1932-6203

IS - 10

M1 - e47610

ER -