Reversal of Deteriorated Fractal Behavior of Heart Rate Variability by Beta‐Blocker Therapy in Patients with Advanced Congestive Heart Failure

Beta‐Blocker Therapy and Heart Rate Variability. Introduction: The slope of the power spectrum in heart rate variability (HRV) reflects the fractal or scaling behavior in HR dynamics and recently was confirmed as an independent predictor of postmyocardial infarction survival. Whether or not the new measurement in HRV foresees the functional evolution in patients with advanced congestive heart failure treated by β blockers is unclear.

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