Key Information
These guidelines were written after an extensive literature search using MedLine publications from January 1980 to April 2021, under the terms "ATTR" AND "transthyretin" AND "amyloidosis". Only full articles in English were considered. Following the literature search and review, the steering committee developed a summary of relevant statements that were evaluated by all the participants. Consensus was established using online, single point-per-point voting, through a nominal group technique. Transthyretin amyloidosis (ATTR amyloidosis) is a disease caused by deposition of transthyretin fibrils in organs and tissues, which causes their dysfunction. The clinical heterogeneity of ATTR amyloidosis and the variable presentation of symptoms at early disease stages, historically meant treatment delays. Diagnostic tools and therapy options of ATTR amyloidosis have markedly improved in recent years.