Background Reduced heart rate variability, particularly in the very-low-frequency (VLF)
spectral band, has been found to be a marker for poor prognosis in patients after myocardial …

Background In advanced chronic heart failure (CHF), correlation between heart rate
variability (HRV) and parameters of disease severity is still unclear. A reduced HRV has …

Although in advanced chronic congestive heart failure (CHF) very low frequency (< 0.04 Hz,
VLF) oscillations are prominent, the clinical importance and the physiologic basis of these …

Autonomic dysfunction seems to be involved in the progression and prognosis of congestive
heart failure. Measurement of heart rate variability (HRV) provides a noninvasive method to …

Background The present study examined whether the very low frequency (VLF) power of
heart rate variability (HRV) is predictive of clinical prognosis in patients with congestive heart …

Heart failure is associated with autonomic imbalance, and this can be evaluated by a
spectral analysis of heart rate variability. However, the time course of low-frequency (LF) and …

We applied spectral techniques to the analysis of cardiorespiratory signals [instantaneous
lung volume (ILV), instantaneous tidal volume (ITV), arterial O2 saturation (Sa O 2) at the …

Background—Oscillatory breathing patterns characterized by rises and falls in ventilation
with apnea (Cheyne-Stokes respiration [CSR]) or without apnea (periodic breathing [PB]) …

Patients with congestive heart failure (CHF) are characterized by an imbalance of the
autonomic nervous system, which may contribute to the progression of circulatory failure and …

Aims Identification of patients with chronic heart failure at risk for sudden death remains
difficult. We sought to assess the prognostic value for all-cause and sudden death of time …