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Power spectrum analysis of circadian oscillations of heart rate variability in patients with left ventricular

V A Bobrov1, V N Chubuchny, O J Zharinov

  • 1Ukrainian Institute of Cardiology, Kyiv, Ukraine.

Revista Portuguesa De Cardiologia : Orgao Oficial Da Sociedade Portuguesa De Cardiologia = Portuguese Journal of Cardiology : an Official Journal of the Portuguese Society of Cardiology
|April 1, 1997
PubMed

Insights

Diurnal heart rate variability (HRV) oscillations differ between healthy individuals and those with left ventricular dysfunction (LVD). Power spectrum analysis reveals distinct HRV patterns, with the lowest amplitude in systolic LVD patients.

Area of Science:

  • Cardiology
  • Physiology
  • Medical Technology

Background:

  • The physiological role of diurnal heart rate variability (HRV) fluctuations remains incompletely understood.
  • Assessing circadian oscillations in HRV is crucial for understanding cardiac health.

Purpose of the Study:

  • To evaluate a novel power spectrum analysis method for circadian HRV oscillations.
  • To investigate HRV patterns in patients with left ventricular systolic and diastolic dysfunction.

Main Methods:

  • 101 patients with coronary artery disease and hypertension underwent Holter ECG and echocardiography.
  • Patients were categorized into systolic LVD (n=55), diastolic LVD (n=46), and control (n=32) groups.
  • A unique HRV assessment involved spectrum analysis of time series data from standard deviations of mean RR intervals.

Main Results:

  • HRV exhibited 12-hour and 80-120 minute oscillations in all groups.
  • The amplitude of these oscillations was highest in the control group.
  • Patients with systolic LVD demonstrated the lowest amplitude of HRV oscillations.

Conclusions:

  • Power spectrum analysis of circadian HRV oscillations provides insights into left ventricular dysfunction (LVD).
  • Regular HRV oscillations were observed in both LVD patients and controls.
  • The amplitude of these oscillations correlates with LVD severity, being highest in controls and lowest in systolic LVD.
Abstract

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