L’évolution rapide des méthodes de dosage des troponines cardiaques (cTn) vers une meilleure sensibilité analytique (cTn de haute sensibilité, ou cTn HS) s’accompagne de nombreuses données de la littérature mais encore incomplètes. Clinicians need to work hand-in-hand with medical biologists to better understand how to use hs-cTn assays in routine practice. The significance of patterns of change between two assay measurements has not yet been documented for every hs-cTn assay.
In brief, the effective use of hs-cTn hinges on knowing: specific assay characteristics, particularly precision at the 99th percentile of a reference population factors of variation at the 99th percentile value and the high-individuality of hs-cTn assays, for which the notion of individual kinetics is more informative than straight reference to ‘normal’ values. To address these issues, the authors take cues and clues from multiple disciplines to bring responses to frequently asked questions. The net result is that cTn assays are not yet standardized and there are still no consensus-built data on how to use and interpret cTn assay results. Cardiac troponin (cTn) assays have quickly gained in analytical sensitivity to become what are termed ‘high-sensitivity cardiac troponin’ (hs-cTn) assays, bringing a flurry of dense yet incomplete literature data.
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