Fig.1
From: Optimizing cardiac amyloidosis assessment: utility of 1-h and 3-h 99mTc-PYP imaging
Final diagnostic tree. Patients are diagnosed with ATTR cardiac amyloidosis (in this tree described as ATTR-CM: ATTR cardiomyopathy) according to the AHA statement. Due to risks associated with myocardial biopsy, it was only performed on a few patients. N: number; 99mTc-PYP: 99mTechnetium-pyrophosphate; H/CL ratio: a heart-to-contralateral lung (H/CL) ratio; hr: hour; ATTR-CM: Transthyretin amyloid cardiomyopathy