FREQUENCY ANALYSIS OF CARDIAC DATA OBTAINED THROUGH HOLTER MONITORING IN REAL LIVING CONDITIONS

Galya Nikolova Georgieva-Tsaneva

doi:10.12955/cbup.v7.1498

Galya Nikolova Georgieva-Tsaneva

Open Access

https://doi.org/10.12955/cbup.v7.1498

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Abstract

The paper presents frequency methods for estimating the variability of intervals between individual heart beats in Electrocardiogram. This parameter is known in the scientific literature as the Heart Rate Variability and with this method it is possible to make predictions about human health. Three frequency ranges have been studied: Very Low Frequency, Low Frequency, and High Frequency. The study in this paper was based on real cardiological data obtained from 33 patients suffering from heart fibrillations and 29 healthy individuals. The investigated records are obtained through a Holter monitoring of studied individuals in real life conditions. The obtained results show significantly lower values of the tested spectral parameters in the diseased individuals compared to the healthy controls. The accomplished study shows the effective applicability of the spectral methods of Heart Rate Variability analysis and the possibility of differentiation by the spectral parameters of the patients from healthy individuals.

Highlights

Heart rate variability (HRV) is a tool for assessing the time variation of intervals between adjacent cardiac pulsations
The report presents a study of Heart Rate Variability in individuals with heart fibrillations, and in healthy individuals
The main aim is to determine whether significant changes occur in HRV in individuals with heart fibrillations

Summary

Introduction

Heart rate variability (HRV) is a tool for assessing the time variation of intervals between adjacent cardiac pulsations. A spectral analysis of long-time 24-hour HRV recording in the total frequency range of 0 to 0.5 Hz distinguishes four sub-bands (according to Hernandez-Fajardo et al, 2008; Georgieva-Tsaneva, 2018), determined for physiological reasons: Ultra Low Frequency (ULF), Very Low Frequency (VLF), Low Frequency (LF) and High Frequency (HF). HF region reflects the fastest changes in heart rate, with peak peaks around 0.25 Hz. The relationship between low frequency components and high frequency components (LF / HF) in the HRV spectrum is an important indicator of the cardiological sympathovagal balance in the body (Matveev et al, 2012).

Results

Conclusion