Feasibility of PiB positron emission tomography/computed tomography for treatment monitoring with Tafamidis in a patient with transthyretin cardiac amyloidosis.

ABSTRACT

We present a 77-year-old woman with wild-type ATTR cardiac amyloidosis (ATTR-CA) who presented with dyspnea, arrhythmia, and elevated NT-pro BNP. Initial imaging including cardiac MRI, PYP scintigraphy, PiB PET/CT and NaF PET/CT revealed cardiac abnormalities. Tafamidis treatment was initiated. After 14 months, symptomatic improvement and reduced NT-pro BNP were observed. Cardiac MRI and PYP scintigraphy showed no significant change and increased NaF accumulation, while PiB PET/CT showed decreased amyloid deposition, suggesting that it may be superior to NaF PET/CT in assessing the therapeutic effect of tafamidis in ATTR-CA.