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Contactless continuous heart rate monitoring system using ballistocardiography

Brian Sumali1, Yasue Mitsukura2, Toshihiko Nishimura3

  • 1Keio Global Research Institute, Faculty of Science and Technology, Keio University, Yokohama, Kanagawa, Japan.

Plos One
|July 29, 2022
PubMed

Insights

Continuous heart monitoring is crucial for cardiovascular disease survival. This study presents a non-contact Ballistocardiogram (BCG) system that accurately estimates heart rate and heart rate variability (HRV) even with abnormal ECG readings.

Area of Science:

  • Biomedical Engineering
  • Cardiology
  • Physiological Monitoring

Background:

  • Cardiovascular disease is the leading global cause of mortality.
  • Low survival rates post-myocardial infarction necessitate continuous heart monitoring.
  • Existing monitoring methods can be invasive or inconvenient.

Purpose of the Study:

  • To develop a non-contact Ballistocardiogram (BCG) measurement system for continuous heart rate acquisition.
  • To create a robust heart rate estimation algorithm capable of handling waveform variations.
  • To validate the system's efficacy in comparison to electrocardiography (ECG).

Main Methods:

  • A BCG measurement system was designed using a chair-integrated load cell.
  • A novel heart rate estimation algorithm was developed to address waveform changes.
  • Simultaneous BCG and ECG measurements were conducted on 13 healthy subjects and 1 subject with abnormal ECG.

Main Results:

  • The BCG system output demonstrated synchronization with ECG R-peak positions.
  • Heart rate intervals estimated from BCG correlated with ECG-derived intervals.
  • Identical heart rate variability (HRV) features were extracted from both BCG and ECG data, even for the abnormal ECG subject.

Conclusions:

  • The developed non-contact BCG system provides accurate heart rate estimation.
  • The system is robust to waveform changes and effective even in cases of abnormal ECG.
  • This technology holds potential for improved cardiovascular health monitoring.

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