The exclusion criteria were as follows: (i) systematic reviews, meta-analyses, case reports, and case series; (ii) studies done on healthy volunteers only, the pediatric population (<18 years), diseases other than transthyretin amyloid cardiomyopathy; (iii) studies with only non-cardiovascular outcomes; (iv) studies published in a non-English language. Here, TTR is linked to cardiac amyloidosis.