Thailand ATTR-CM Registry

Inclusion Criteria: * Age \> 18 years. * All patients diagnosed with ATTR-CM (Transthyretin cardiomyopathy) who have either symptomatic or asymptomatic must have evidence of cardiac involvement by echocardiogram as defined by left ventricle wall thickness of ≥ 12 mm and with at least one of the following criteria: * Positive scintigraphy by 99mTC-DPD \[99mTC-3,3-diphosphono-1,2-propano-dicarboxylic acid\] or 99mTC-PYP \[Pyrophosphate\] or 99mTC-HMDP \[hydroxymethylene diphosphate\] with Perugini grade ≥ 2 and/or H/CL (heart to contralateral lung) ratio \> 1.5 * Positive scintigraphy by 99mTC-DPD \[99mTC-3,3-diphosphono-1,2-propano-dicarboxylic acid\] or 99mTC-PYP \[Pyrophosphate\] or 99mTC-HMDP \[hydroxymethylene diphosphate\] with Perugini grade 1 and positive cardiac biopsy tissue confirmed which Congo red stain ≥ 4 sites * Positive scintigraphy by 99mTC-DPD \[99mTC-3,3-diphosphono-1,2-propano-dicarboxylic acid\] or 99mTC-PYP \[Pyrophosphate\] or 99mTC-HMDP \[hydroxymethylene diphosphate\] with Perugini grade 1 with positive non-cardiac biopsy tissue confirmed by Congo red stain * Abnormalities on CMR (Cardiac MRI) \[Subendocardium LGE (late gadolinium enhancement) and/or elevated native T1 value and/or increased extracellular volume (ECV \> 0.4)\] with positive non-cardiac and/or cardiac tissue biopsy confirmed by Congo red stain Exclusion Criteria: * Diagnosed with amyloidosis caused by proteins other than transthyretin (light chain Amyloidosis, etc.) * Diagnosed with secondary amyloidosis