[Clinical Practice Guidelines for diagnosis of organic involvement of amyloidosis: Part 2/3.Year 2020]

Cardiac MRI with T1 mapping technique and extracellular volume measurement for the early diagnosis of amyloidosis in patients with previous studies suggestive of amyloidosis. Measurement of type B-type natriuretic peptide measurement be used for screening and diagnosis of cardiac amyloidosis. Pyrophosphate scintigraphy to make a preliminary diagnosis of patients with suspected cardiac amyloidosis, so as to distinguish ATTR (positive) from other patients.