In the Cox regression analysis, predictors of mortality in TTR-CA patients included older age (hazard ratio (HR) 1.048; <i>p</i> = 0.001), CKD (HR 1.637; <i>p</i> = 0.029), troponin T >50 ng/L (HR 1.594; <i>p</i> = 0.031), NT-proBNP >3000 pg/mL (HR 1.514; <i>p</i> = 0.050), and ejection fraction <40% (HR 1.935; <i>p</i> = 0.003). Here, NPPB is linked to chronic kidney disease.