TTR and cardiomyopathy: Hereditary transthyretin-mediated (hATTR) amyloidosis is a rare (prevalence: 1/1,000,000 persons [1]), potentially fatal, autosomal dominant, multisystemic disease caused by mutations in the transthyretin (TTR) gene with as main features a progressive sensory and autonomic motor neuropathy and/or a cardiomyopathy [2–5].