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• W4311754968 abstract "Abstract Background Cardiac amyloidosis (CA) is associated with an elevation of natriuretic peptides and troponins, predicting outcome. Nevertheless, the diagnostic yield of these biomarkers has not been extensively investigated. Aim To evaluate the diagnostic performance for CA of N-terminal pro-B-type natriuretic peptide (NT-proBNP) and high-sensitivity troponin T (hs-TnT). Methods Patients with suspected CA (n=1,149) underwent a diagnostic work-up in 3 Centers in Italy, France (n=343, derivation cohort), and United Kingdom (n=806, validation cohort). Biomarker values with either 100% sensitivity or ≥95% specificity were selected as rule-out/rule-in cut-offs, respectively. Results In the derivation cohort, 227 patients (66%) had CA, and presented with higher NT-proBNP and hs-TnT. NT-proBNP 180 ng/L and hs-TnT 14 ng/L were selected as rule-out cut-offs, and hs-TnT 86 ng/L as rule-in cut-off. NT-proBNP &lt;180 ng/L or hs-TnT &lt;14 ng/L were found in 7% of patients, ruled out without false negatives. In the validation cohort, 20% of patients (2% false negatives) had NT-proBNP &lt;180 ng/L or hs-TnT &lt;14 ng/L, and 10% showed both biomarkers below cut-offs (0.5% false negatives). These cut-offs refined CA prediction when added to echocardiographic scores in patients with a hematologic disease or an increased wall thickness. In the validation cohort, the 86 ng/L hs-TnT cut-off ruled in 20% of patients (2% false positives). Conclusions Cardiac biomarkers can refine the diagnostic algorithm in patients with suspected CA. NT-proBNP &lt;180 ng/L and hs-TnT &lt;14 ng/L reliably exclude the diagnosis (Figure), both in the overall population and subgroups referred for either AL-CA or cardiac (pseudo)hypertrophy." @default.
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• W4311754968 date "2022-12-14" @default.
• W4311754968 modified "2023-10-14" @default.
• W4311754968 title "490 NT-PROBNP AND HIGH-SENSITIVITY TROPONIN T HOLD DIAGNOSTIC VALUE IN CARDIAC AMYLOIDOSIS" @default.
• W4311754968 doi "https://doi.org/10.1093/eurheartjsupp/suac121.594" @default.
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