In cardiac amyloidosis (CA), “cardiac imaging and EMB or extra-cardiac biopsy are needed for the diagnosis of AL-CA in patients with abnormal hematological tests.” In transthyretin (TTR) -CA, “CMR has a sensitivity and specificity of 85% and 92%.” Among the “red flags for most common forms of cardiac amyloidosis”, CMR is listed, with “subendocardial LGE, elevated native T1 values, increased extracellular volume and abnormal gadolinium kinetics” being present in AL-CA and TTR-CA. This evidence concerns the gene TTR and cardiac amyloidosis.