MO092: Prevalence and Renal Prognosis of Left Ventricular Diastolic Dysfunction in Nondialysis Chronic Kidney Disease Patients With Preserved Systolic Function

Abstract

BACKGROUND AND AIMS Left ventricular (LV) diastolic dysfunction is common in nondialysis chronic kidney disease (ND-CKD) patients; however, the prevalence estimated according to the new diagnostic criteria as well as the prognostic role of diastolic dysfunction on CKD progression remain unknown. METHOD We longitudinally evaluated consecutive ND-CKD patients and preserved systolic function (LV ejection fraction > 50%). According to the recently updated guidelines, LV diastolic dysfunction was assessed by four echocardiographic variables (annular e’ velocity, average mitral valve E-wave/e’ ratio, left atrial volume index and tricuspid regurgitation). Patients were classified as diastolic dysfunction, indeterminate and normal. Time-dependent eGFR change was assessed by mixed-effects regression model. Cumulative incidence of composite renal outcome (eGFR decline > 50% or chronic dialysis) was also estimated. RESULTS Among 140 patients (age 66.2 ± 14.5 years; 61% males; eGFR 39.8 ± 21.8 mL/min/1.73 m2; 43.6% diabetics), diastolic dysfunction occurred in 22.9%, indeterminate in 45.7% and normal in 31.4%. Prevalence of diastolic dysfunction was much lower than that estimated with older criteria (62.1%). Logistic regression (OR, 95%CI) showed that diastolic dysfunction was associated with lower eGFR (0.97, 0.94–0.99), older age (1.08, 1.01–1.06) and nighttime systolic blood pressure (1.04, 1.00–1.07). Across 1702 eGFR measurements collected during a median follow-up of 4.6 years, eGFR decline (mL/min/1.73 m2/year) was faster in patients with diastolic dysfunction (−2.12, 95%CI from −2.68 to −1.56) and in the indeterminate (11.2/100 pts/year) as compared with normal (−1.14, 95%CI from −1.64 to −0.63) (Figur 2). Incidence of composite renal outcome was significantly higher in diastolic dysfunction (13.8/100 pts/year) than in normal group (3.5/100 pts/year). CONCLUSION In ND-CKD population, LV diastolic dysfunction is less frequent than previously described and acts as independent predictor of CKD progression. Mixed-effect regression was adjusted for age, gender, diabetes, prior cardiovascular disease, log(proteinuria), systolic office blood pressure (BP), diurnal and nocturnal systolic ambulatory BP and left ventricular hypertrophy.