Diagnostic pathways to wild‐type transthyretin amyloid cardiomyopathy: a multicentre network study

• Published in: European journal of heart failure 2023-06, Vol.25 (6), p.845-853
• Main Authors: Tini, Giacomo, Milani, Paolo, Zampieri, Mattia, Caponetti, Angelo G., Fabris, Francesca, Foli, Andrea, Argirò, Alessia, Mazzoni, Carlotta, Gagliardi, Christian, Longhi, Simone, Saturi, Giulia, Vergaro, Giuseppe, Aimo, Alberto, Russo, Domitilla, Varrà, Guerino G., Serenelli, Matteo, Fabbri, Gioele, De Michieli, Laura, Palmiero, Giuseppe, Ciliberti, Giuseppe, Carigi, Samuela, Sessarego, Eugenio, Mandoli, Giulia E., Ricci Lucchi, Giulia, Rella, Valeria, Monti, Enrico, Gardini, Elisa, Bartolotti, Michela, Crotti, Lia, Merli, Elisa, Mussinelli, Roberta, Vianello, Pier Filippo, Cameli, Matteo, Marzo, Francesca, Guerra, Federico, Limongelli, Giuseppe, Cipriani, Alberto, Perlini, Stefano, Obici, Laura, Perfetto, Federico, Autore, Camillo, Porto, Italo, Rapezzi, Claudio, Sinagra, Gianfranco, Merlo, Marco, Musumeci, Beatrice, Emdin, Michele, Biagini, Elena, Cappelli, Francesco, Palladini, Giovanni, Canepa, Marco
• Format: Article
• Language: English
• Subjects: Amyloid Neuropathies, Familial - complications; Amyloid Neuropathies, Familial - diagnosis; Amyloid Neuropathies, Familial - epidemiology; Cardiac amyloidosis; Cardiomyopathies - complications; Cardiomyopathies - diagnosis; Cardiomyopathies - epidemiology; Epidemiology of cardiac amyloidosis; Heart Failure - complications; Heart Failure - diagnosis; Heart Failure - epidemiology; Humans; Prealbumin - genetics; Prealbumin - metabolism; Retrospective Studies; Tafamidis; Wild‐type transthyretin cardiac amyloidosis
• ISSN: 1388-9842; 1879-0844
• DOI: 10.1002/ejhf.2823

Aim Epidemiology of wild‐type transthyretin cardiac amyloidosis (ATTRwt‐CA) remains poorly defined. A better characterization of pathways leading to ATTRwt‐CA diagnosis is of key importance, and potentially informative of disease course and prognosis. The aim of this study was to describe the characteristics of contemporary pathways leading to ATTRwt‐CA diagnosis, and their potential association with survival. Methods and results This was a retrospective study of patients diagnosed with ATTRwt‐CA at 17 Italian referral centres for CA. Patients were categorized into different ‘pathways’ according to the medical reason that triggered the diagnosis of ATTRwt‐CA (hypertrophic cardiomyopathy [HCM] pathway, heart failure [HF] pathway, incidental imaging or incidental clinical pathway). Prognosis was investigated with all‐cause mortality as endpoint. Overall, 1281 ATTRwt‐CA patients were included in the study. The diagnostic pathway leading to ATTRwt‐CA diagnosis was HCM in 7% of patients, HF in 51%, incidental imaging in 23%, incidental clinical in 19%. Patients in the HF pathway, as compared to the others, were older and had a greater prevalence of New York Heart Association (NYHA) class III–IV and chronic kidney disease. Survival was significantly worse in the HF versus other pathways, but similar among the three others. In multivariate model, older age at diagnosis, NYHA class III–IV and some comorbidities but not the HF pathway were independently associated with worse survival. Conclusions Half of contemporary ATTRwt‐CA diagnoses occur in a HF setting. These patients had worse clinical profile and outcome than those diagnosed either due to suspected HCM or incidentally, although prognosis remained primarily related to age, NYHA functional class and comorbidities rather than the diagnostic pathway itself. Pathways to wild‐type transthyretin amyloid (ATTRwt) cardiomyopathy diagnosis. AFib, atrial fibrillation; CKD, chronic kidney disease; HCM, hypertrophic cardiomyopathy; HF, heart failure; HR, hazard ratio; LVEF, left ventricular ejection fraction; NYHA, New York Heart Association; PM, pacemaker.