Interpretation of elevated baseline concentrations and serial changes of high-sensitivity cardiac troponin T in confirmed muscular dystrophies

Aims Concentrations of high-sensitivity cardiac troponin T (hs-cTnT) are frequently elevated in stable patients with confirmed muscle dystrophies. However, sparse information is available on the interpretation of serial concentration changes. Methods Hs-cTnT was collected in 35 stable outpatients wi...

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Hauptverfasser: Yildirim, Mustafa (VerfasserIn) , Reich, Christoph (VerfasserIn) , Salbach, Christian (VerfasserIn) , Pribe-Wolferts, Regina (VerfasserIn) , Milles, Barbara Ruth (VerfasserIn) , Täger, Tobias (VerfasserIn) , Müller-Hennessen, Matthias (VerfasserIn) , Weiler, Markus (VerfasserIn) , Meder, Benjamin (VerfasserIn) , Frey, Norbert (VerfasserIn) , Giannitsis, Evangelos (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: December 2024
In: ESC heart failure
Year: 2024, Jahrgang: 11, Heft: 6, Pages: 3732-3741
ISSN:2055-5822
DOI:10.1002/ehf2.14864
Online-Zugang:Verlag, kostenfrei, Volltext: https://doi.org/10.1002/ehf2.14864
Verlag, kostenfrei, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/ehf2.14864
Volltext
Verfasserangaben:Mustafa Yildirim, Christoph Reich, Christian Salbach, Regina Pribe-Wolferts, Barbara Ruth Milles, Tobias Täger, Matthias Mueller-Hennessen, Markus Weiler, Benjamin Meder, Norbert Frey and Evangelos Giannitsis

MARC

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520 |a Aims Concentrations of high-sensitivity cardiac troponin T (hs-cTnT) are frequently elevated in stable patients with confirmed muscle dystrophies. However, sparse information is available on the interpretation of serial concentration changes. Methods Hs-cTnT was collected in 35 stable outpatients with confirmed skeletal muscle dystrophies at 0 and 1 h and after 6-12 months during scheduled outpatient visits. We simulated the effectiveness of the European Society of Cardiology (ESC) 0/1 h algorithm and assessed biological variation at 6-12 months using two established methods: reference change value (RCV) and minimal important difference (MID). Results Median baseline hs-cTnT concentrations were 34.4 ng/L [inter-quartile range (IQR): 17.5-46.2], and values > 99th percentile upper limit of normal were present in 34 of 35 patients. All patients were stable without cardiovascular adverse events during a follow-up of 6.6 months (IQR: 6-7). Median concentration change was 1.9 ng/L (IQR: 0.7-3.2) and 0.8 ng/L (IQR: 0-7.0) at 60 min and 6-9 months, respectively. Applying the criteria of the ESC 0/1 h algorithm for triage of suspected acute coronary syndrome (ACS) showed poor overall effectiveness of baseline hs-cTnT values. No patient would qualify for rule-out based on hs-cTnT less than the limit of detection, whereas five cases would qualify for rule-in based on hs-cTnT ≥ 52 ng/L. Biological variabilities at 6-12 months per MID and RCV were 1.2 ng/L [95% confidence interval (CI): 0.7-2.1] and 28.6% (95% CI: 27.9-29.6), respectively. A total of 8 (22.9%) and 25 (71.4%) cases exceeded the biological variation range, suggesting some additional myocardial damage. Conclusions The high prevalence of elevated hs-cTnT could negatively impact the effectiveness of rule-out and rule-in strategies based on a single hs-cTnT value. Knowledge of the physiological and biological variation of hs-cTnT after 6-12 months is helpful to detect the progression of cardiac involvement or to search for cardiac complications including but not limited to arrhythmias that may trigger acute or chronic myocardial damage. 
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