대한의용생체공학회:학술대회논문집 (Proceedings of the KOSOMBE Conference)

대한의용생체공학회 (The Korean Society of Medical and Biological Engineering)
권호 표지

고해상도 심전계의 개발

Development of a High-Resolution Electrocardiography

  • 이호성 (건국대학교 의과대학 의학공학과) ;
  • 우응제 (건국대학교 의과대학 의학공학과) ;
  • 박승훈 (건국대학교 의과대학 의학공학과) ;
  • 이종민 (서울대학교 의과대학 의공학과) ;
  • 박광석 (서울대학교 의과대학 의공학과)
  • Lee, H.S. (Department of Biomedical Engineering, College of Medicine, Kon Kuk University) ;
  • Woo, E.J. (Department of Biomedical Engineering, College of Medicine, Kon Kuk University) ;
  • Park, S.H. (Department of Biomedical Engineering, College of Medicine, Kon Kuk University) ;
  • Lee, J.M. (Department of Biomedical Engineering, College of Medicine, Seoul National University) ;
  • Park, K.S. (Department of Biomedical Engineering, College of Medicine, Seoul National University)
  • 발행 : 1996.05.17
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초록

Most of the conventional electrocardiogaphies fail to detect signals other than P-QRS-T due to the limited SNR and bandwidth. High-resolution electrocardiography (HRECG) provides better SNR and wider bandwidth for the detection of micro-potentials with higher frequency components such as ventricual late potentials(LP). In this paper, we developed a HRECG using uncorrected XYZ lead. The overall gain of the amplifier is 4000 and the bandwidth is $0.5{\sim}300Hz$ without using 60Hz notch filter. Three 16-bit AH converters sample X, Y, and Z signals simultaneously with a sampling frequency of 2000Hz. Sampled data are transmitted to PC via a DMA-controlled serial communication channel using RS-485 and HDLC protocol. The noise level of the developed HRECG is less than $5{\mu}V_{rms,\;RTI}$. In order to further reduce the noise level, signal averaging technique is implemented utilizing template matching method. The SNR of the developed HRECG is high enough for the detection of LP.

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