NPPB and cardiac amyloidosis: Guidelines from the Japanese Circulation Society Joint Working Group on the diagnosis and management of cardiac amyloidosis were published in 2020, with a simple staging system combining high‐sensitivity cardiac troponin T, brain natriuretic peptide (BNP), and estimated glomerular filtration rate, more recently reported to be useful in predicting prognosis in Japanese patients with wild‐type ATTR‐CM.10, 11