NPPB and pericardial effusion: Patient 1, who received liver transplantation and tafamidis 20 mg, developed a significant pericardial effusion and progressive cardiomyopathy with an + 1652 ng/L increase in the plasma NT-proBNP over the course of 3 years and in IVSd changing from 19 to 27 mm over the course of 5 years before dose escalation to tafamidis 61 mg.