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Effect of Hemodialysis on Levels of High-Sensitivity Cardiac Troponin T.
American Journal of Cardiology 2017 December 2
Cardiac troponin (cTn) is essential for the diagnosis of an acute coronary syndrome (ACS). However, in end-stage renal disease (ESRD) baseline cTn levels are often elevated, and it is unknown whether the hemodialysis (HD) procedure affects cTn levels. This leaves clinicians unsure of how to interpret cTn in HD patients with cardiac ischemia. We therefore sought to determine if plasma levels of high-sensitivity cardiac troponin T (hs-cTnT) vary during or after HD treatment. We prospectively enrolled 10 chronic HD patients who were admitted to our institution. All participants were receiving thrice weekly HD before admission and were medically stable. Those admitted for ACS or to critical care units were excluded. Baseline hs-cTnT was measured immediately before HD. For the subsequent 6 hours, hs-cTnT was measured every 2 hours and every 3 hours thereafter for a total collection period of 24 hours. A significant decline in mean hs-cTnT was noted with HD. During HD (2 hours after HD initiation), hs-cTnT decreased by 10.7% (confidence interval 5% to 17%). Immediately after HD (4 hours after HD initiation), a decline of 12% (confidence interval 5% to 19%) was observed. Thereafter hs-cTnT began to rise. Hs-cTnT levels returned to baseline by 11 hours after HD completion and remained stable for the reminder of the study. In conclusion, HD induces a short-lived negative bias in hs-cTnT. When measured for investigation of ACS, hs-cTnT concentration should be interpreted with respect to time of dialysis and specimen collection.
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