In the whole population proximal RCP was significantly associated (p < 0.05) with age, CKD-EPICys-Cr, NT-proBNP, Troponin-I, E/A, E/E′, LVEF, RI, and cIMT (Table 5), but in multivariable regression analysis adjusted to age (model without RI) only LVEF and cIMT were independently associated with proximal RCP (R2 = 0.39; p < 0.001). Here, NPPB is linked to chronic kidney disease.