Journal of Biomedical Engineering Research (대한의용생체공학회:의공학회지)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
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Interpolation Technique to Improve the Accuracy of RR-interval in Portable ECG Device

휴대형 심전계 장치의 RR 간격의 정확도 개선을 위한 보간법 개발

  • Lee, Eun-Mi (Department of Biomedical Engineering, College of Medicine, Chungbuk National University) ;
  • Hong, Joo-Hyun (Department of Biomedical Engineering, College of Medicine, Chungbuk National University) ;
  • Cha, Eun-Jong (Department of Biomedical Engineering, College of Medicine, Chungbuk National University) ;
  • Lee, Tae-Soo (Department of Biomedical Engineering, College of Medicine, Chungbuk National University)
  • 이은미 (충북대학교 의과대학 의공학교실) ;
  • 홍주현 (충북대학교 의과대학 의공학교실) ;
  • 차은종 (충북대학교 의과대학 의공학교실) ;
  • 이태수 (충북대학교 의과대학 의공학교실)
  • Received : 2010.05.12
  • Accepted : 2010.06.09
  • Published : 2010.09.30
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Abstract

HRV(Heart rate variability) analysis parameter is widely used as an index to evaluate the autonomic nervous system and cardiac function. For reliable HRV analysis, we need to acquire the accurate ECG signals. Most of commercially available portable ECG devices have low sampling rate because of low power consumption and small size issues, which make it difficult to measure RR-interval accurately. This study is to improve the accuracy of RR-interval by developing R-wave interpolation technique, based on the morphological characteristics of the QRS complex. When the developed method was applied to ECG obtained at 200 Hz and the results were compared with 1000 Hz reference device, the error range decreased by 1.33 times in sitting and by 2.38 times in cycling exercise. Therefore, the proposed interpolation technique is thought to be useful to improve the accuracy of R-R interval in the portable ECG device with low sampling rate.

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References

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