Abstract
Aims
Amyloidosis are a group of diseases characterized by the extracellular deposition of amyloid fibrils. The two most common forms of cardiac amyloidosis (CA) are caused by the accumulation of immunoglobulin light-chains (AL) or transthyretin (ATTR). While previously considered as a rare disease, increased awareness and recent advances in diagnostic tools have shown that prevalence of CA is likely underestimated. Nonetheless, large-scale population registries of CA, also focusing on the pathways leading to the final diagnosis, are still missing.
Methods and results
The Cardiac Amyloidosis RegistRY (CARRY) is an observational, prospective, multicentre study endorsed by the Italian Society of Cardiology (Sezione Regionale Tosco-Umbra), collecting data from in- and outpatients referred with the clinical suspicion of CA. Clinical, laboratory (including natriuretic peptides and high-sensitivity troponins), and echocardiographic data at enrollment will be collected. Detailed information about the diagnostic procedures up to the final diagnosis of either CA or mimicking conditions will be registered. Patients with a diagnosis of CA will be followed up, and the baseline assessment will be repeated at 1-year (Figure). Twenty centres in Tuscany and Umbria, including amyloidosis referral centres as well as second-level Hospitals, are contributing to the CARRY registry. A common, web-based, case report form is being used for data collection. Recruitment begun in July 2021 and will end in July 2022. The first interim analysis is planned in January 2022.
Conclusions
The CARRY registry is expected to give novel information on the epidemiology of CA, with a focus on the incidence and diagnostic pathways of CA in Tuscany and Umbria, setting the bases for a larger nationwide registry. Clarification of the epidemiology of CA through the data from the CARRY registry may prove useful in the next future for either clinicians and policy makers. FigureStudy flow chart of the CARRY registry.