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Kreusser, Michael M.; Volz, Martin J.; Knop, Benjamin; Ehlermann, Philipp; Schmack, Bastian; Ruhparwar, Arjang; Hegenbart, Ute; Schönland, Stefan O.; Katus, Hugo A.; Raake, Philip W.
Clinical research in cardiology, 06/2020, Volume: 109, Issue: 6Journal Article
Background Cardiac amyloidosis, caused by deposition of immunoglobulin light chains (AL) or transthyretin (ATTR), carries a poor prognosis. Established risk scores for amyloidosis may not predict outcomes in those patients who develop advanced heart failure and who are potential candidates for heart transplantation. Here, we aimed to identify predictive parameters for patients with severe heart failure due to amyloidosis. Methods Out of > 1000 patients with cardiac amyloidosis (AL or ATTR) admitted to our centre between September 1998 and January 2016, a cohort of 120 patients with a complete cardiac assessment at diagnosis, including right heart catheterization, echocardiography and biomarkers, was analysed retrospectively in this study. Primary endpoint was all-cause mortality. We performed univariate and multivariate Cox regression analysis, generated risk scores to predict outcomes in AL and ATTR amyloidosis and compared those to established risk models for amyloidosis. Results In the Cox multivariate model, high-sensitivity troponin T (hsTnT; hazard ratio (HR) 1.003; confidence interval (CI) 1.001–1.005; p = 0.009) and mean pulmonary artery pressure (HR 1.061; CI 1.024–1.100; p = 0.001) were found to significantly and independently predict outcomes for AL amyloidosis, whereas QRS duration (HR 1.021; CI 1.004–1.039; p = 0.013), hsTnT (HR 1.021; CI 1.006–1.036; p = 0.006) and N-terminal pro-brain natriuretic peptide (HR 1.0003; CI 1.0001–1.0004; p = 0.002) were the best predictors for ATTR amyloidosis. A simple risk score (“HeiRisk”) including these parameters for AL and ATTR allowed a more precise risk stratification in our patient population compared to established risk models. Conclusions Risk stratification for cardiac amyloidosis with the newly developed “HeiRisk” score may be superior to other staging systems for patients with advanced heart failure due to amyloid cardiomyopathy.
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