A new approach for analysis of heart rate variability and QT variability in long-term ECG recording

Hau Tieng Wu, Elsayed Z. Soliman

Research output: Contribution to journalArticlepeer-review

Abstract

Background and purpose: With the emergence of long-term electrocardiogram (ECG) recordings that extend several days beyond the typical 24-48 h, the development of new tools to measure heart rate variability (HRV) and QT variability is needed to utilize the full potential of such extra-long-term ECG recordings. Methods: In this report, we propose a new nonlinear time-frequency analysis approach, the concentration of frequency and time (ConceFT), to study the HRV QT variability from extra-long-term ECG recordings. This approach is a generalization of Short Time Fourier Transform and Continuous Wavelet Transform approaches. Results: As proof of concept, we used 14-day ECG recordings to show that the ConceFT provides a sharpened and stabilized spectrogram by taking the phase information of the time series and the multitaper technique into account. Conclusion: The ConceFT has the potential to provide a sharpened and stabilized spectrogram for the heart rate variability and QT variability in 14-day ECG recordings.

Original languageEnglish (US)
Article number54
JournalBioMedical Engineering Online
Volume17
Issue number1
DOIs
StatePublished - May 3 2018

Keywords

  • Concentration of frequency and time (ConceFT)
  • Heart rate variability
  • Long-term ECG recording
  • QT variability
  • Time-frequency analysis

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology
  • Biomaterials
  • Biomedical Engineering
  • Radiology Nuclear Medicine and imaging

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