Abstract 14213: Different Prognostic Value of Proteinuria According to the Severity of Heart Failure in Patients With Heart Failure With Preserved Ejection Fraction
Introduction: Proteinuria reflects systemic inflammation and endothelial dysfunction, and is a prognosticator in heart failure with preserved ejection fraction (HFpEF). However, it remains elusive whether the prognostic impact of proteinuria is different according to the severity of HFpEF. Recently, we and other groups reported that echocardiographic diastolic dysfunction (DD) is a worse prognostic factor in HFpEF. Objectives: We aimed to clarify the prognostic value of proteinuria in HFpEF according to the severity of HFpEF. We used the evidence of DD as criteria of the severity of HFpEF. Methods: We assessed 575 discharged-alive patients (pts) in the PURSUIT-HFpEF registry. Pts were divided into 2 groups according to the absence (DD-) or presence of DD (DD+). DD was defined using the 2016 ASE recommendations. Each group was further classified into 2 subgroups according to the absence or presence of dipstick proteinuria (proteinuria trace or more). The study endpoint was a composite of all-cause mortality and HF hospitalization. Results: Median age 83 years and 58% female. The number of pts with DD-: 336 pts (221 pts: proteinuria-[G1], 115 pts: proteinuria+[G2]); and DD+: 239 pts (125 pts: proteinuria-[G3], 114 pts: proteinuria+[G4]). G4 had higher NT-proBNP level than G3, but not observed between G1 and G2. Proteinuria+ were more hypertensive, diabetic with worse renal function than proteinuria- in both DD-/DD+. The composite endpoint occurred more often in G4 than G3 (HR: 1.75, 95%CI: 1.18-2.62, log-rank P=0.005), but was similar between G1 and G2 (HR: 1.21, 95%CI: 0.76-1.92, log-rank P=0.431). Multivariable Cox regression adjusting for NT-proBNP, eGFR and other major confounding factors revealed that proteinuria was associated with the composite endpoint in DD+ (HR:1.85, 95% CI:1.16-2.93, P=0.009), but not in DD- (HR:0.96, 95% CI:0.55-1.69, P=0.900). Conclusions: Proteinuria may be an additive risk factor in pts with DD but not in those without DD in HFpEF.