نبذة مختصرة : Free PMC article ; Amyloidosis is a group of disorders characterised by the accumulation of extracellular deposits of insoluble protein aggregates. Clinical management depends on the accurate identification of the amyloid precursor and underlying cause. We describe a rare case of apolipoprotein A-IV cardiac amyloidosis, the diagnosis of which required mass spectrometry-based proteomic analysis. ; Learning points: To be able to perform the differential diagnosis of cardiac amyloidosis subtypes using imaging methods, analytical results and tissue analysis.To recognise the added value of mass spectrometry (MS)-based proteomic analysis ; The Authors acknowledge Rede Nacional de Espectrometria de Massa, ROTEIRO/0028/2013, ref. LISBOA-01-0145-FEDER-022125, supported by COMPETE and North Portugal Regional Operational Programme (Norte2020), under the PORTUGAL 2020 Partnership Agreement, through the European Regional Development Fund (ERDF). This work is partially funded by FCT - Fundação para a Ciência e a Tecnologia [UID/BIM/04293/2013]. ; info:eu-repo/semantics/publishedVersion
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