Prognostic value of heart rate variability in patients with renal failure on hemodialysis

International Journal of Cardiology
Keiko OikawaHaruki Itoh

Abstract

In patients with renal failure on hemodialysis cardiovascular disease is a major cause of death. It has been reported that diminished heart rate variability (HRV) relates to the unfavorable prognosis in post-infarction and/or heart failure patients. However, the prognostic value of HRV in hemodialysis patients has not been fully established. Time- and frequency-domain analysis of HRV on 24-hour ambulatory electrocardiography recording was assessed prospectively in 383 chronic hemodialysis patients (220 men and 163 women, mean age 57+/-13 years, ejection fraction 65+/-12%). During 2110+/-903 days of follow up, 146 patients died (31 congestive heart failure, 13 fatal myocardial infarction, 13 sudden deaths, 26 stroke, and 63 non-cardiovascular deaths). A Cox univariate analysis identified the following factors as predictors of both all-cause and cardiovascular death: age, gender, ejection fraction, presence of diabetes, and HRV parameters calculated in the time- and frequency-domain. In multivariate analysis, a low standard deviation of all normal RR intervals (SDNN) value was the strongly associated with both all-cause and cardiovascular death (hazard ratios [95% confidence intervals] 0.988 [0.982-0.994] and 0.984 [0.974-0.993],...Continue Reading

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Citations

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