Abstract 9820: WATCH-DM Risk Score is Associated with Functional Capacity and Prognosis in Diabetic Patients with Heart Failure with Preserved Ejection Fraction

Abstract

Introduction: The coexistence of type 2 diabetes mellitus (T2DM) and heart failure (HF) is frequent and associated with a higher mortality. WATCH-DM risk score is recently developed to predict the risk of HF among patients with T2DM using a machine learning approach (Segar et al, Diabetes Care 2019). Hypothesis: We hypothesized that WATCH-DM risk score would be associated with functional capacity and clinical outcomes in diabetic patients with HF with preserved ejection fraction (HFpEF). Methods: The PURSUIT-HFpEF (Prospective, Multicenter, Observational Study of Patients with Heart Failure with Preserved Ejection Fraction) study is a multicenter registration of patients hospitalized for acute decompensated HFpEF. Among 1095 patients registered between 2016 and 2020, 418 patients (38.2%) had T2DM (male gender 49.5%, age 80±9 years, HbA1c 6.8±1.0%). WATCH-DM risk score was calculated in each patient, using BMI, age, systolic/diastolic blood pressure, serum creatinine, HDL-C, fasting plasma glucose, QRS duration, history of myocardial infarction or coronary bypass graft, and patients were divided as the low to average (≤10 points), high (11-13 points) and very high (≥14 points) risk groups. We measured 6 minute walk distance (6MWD) and NT-proBNP before discharge. We followed the study patients for median of 386 days (IQR 221 to 729 days) to observe the major adverse cardiovascular events (MACE; composite of death, heart failure hospitalization and stroke). Results: The WATCH-DM score in the study patients were 12.8±3.1 points, and 108 patients (25.8 %) had low-average, 147 patients (35.2%) high, and 163 patients (39.0%) very high HF risk. There was significant difference in 6MWD (p=0.004) among the groups, and the low-average risk group had significantly longer 6MWD than the high risk group (p=0.049). NT-proBNP was lower in the low-average risk group than in other 2 groups. Cox proportional hazard model selected the WATCH-DM score as an independent predictor for MACE (p=0.006). Kaplan-Meier curve demonstrated that patients with the low-average risk had significantly lower incidence of MACE than the others (p=0.049). Conclusions: The WATCH-DM risk score predicted functional capacity and prognosis in diabetic patients with HFpEF.