Background: The prognostic role of left ventricular remodeling and renal function in elderly hypertensive patients has been so far scarcely investigated.
Aims: We assessed the impact of left ventricular geometry and renal function on 24h-Holter electrocardiogram (ECG) recordings and outcome in elderly hypertensive patients.
Methods: We enrolled 251 asymptomatic hypertensive elderly patients (>65year-old). Left ventricular remodeling was evaluated by 2-D echocardiogram. Lown's class, mean QTc and standard deviation of all normal R-R intervals (SDNN) were assessed by 24-h Holter-ECG recordings. Data on all-cause and cardiovascular mortality were collected for 2years.
Results: Mean age was 76.2±11.4years. High Lown's classes were more frequently observed in the presence of left ventricular hypertrophy (LVH) (57.3% vs. 23.7%; p<0.001). Mean QTc was 444.8±34.8ms and resulted directly correlated with indexed left ventricular mass (r=0.228; p=0.001). Patients with Chronic Kidney Disease (CKD) showed lower SDNN as compared with those with preserved renal function (92.02±36.11ms vs. 103.84±33.96ms, respectively; p=0.017). At 2years, all-cause and cardiovascular mortality rates were 38.0% and 21.1%, respectively. Diabetes mellitus (HR: 2.40; 95% C.I.1.16 to 4.99; p=0.019), CKD (HR: 2.22; 95% C.I.1.10 to 4.52; p=0.028), prolonged QTc (HR: 2.18; 95% C.I.1.07 to 4.41; p=0.030) and SDNN<96ms (HR: 1.98; 95% C.I.1.03 to 4.13; p=0.048) were independent predictors of cardiovascular death at 2year follow-up.
Conclusions: CKD and left ventricular remodeling predicted altered ventricular batmotropism. Diabetes, CKD, heart rate variability and QTc are important predictors of cardiovascular death in elderly hypertensive patients.
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