TTR and hydrops fetalis: AL, SSA, and ATTR amyloidoses may manifest with cardiac involvement; but the clinical presentation is dependent on the type of precursor protein, and the outcome of each is quite different.2,4 AL‐related CMP (AL‐CMP) features rapidly progressive HF with an extremely poor prognosis and a median survival of <6 months when untreated.3 HF in SSA and ATTR‐related CMP is usually less severe and progresses more slowly than AL‐CMP.