Proceedings of the KOSOMBE Conference (대한의용생체공학회:학술대회논문집)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
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Measurement of cardiac output during treadmill exercise by impedance cardiography with a new ensemble average

새로운 앙상블 평균법에 의한 임피던스 심장기록법의 트래드밀 운동 중의 심박출량 측정

  • Kim, Deok-W. (Dept of Medical Engineering, Yonsei University College of Medicine) ;
  • Song, Chul-G. (Dept of Medical Engineering, Yonsei University College of Medicine) ;
  • Oh, In-S. (Dept of Medical Engineering, Yonsei University College of Medicine) ;
  • Hwang, Soo-K. (Dept. of EPhysiology, Yonsei University College of Medicine) ;
  • Kim, Won-K. (Dept of Medical Engineering, Yonsei University College of Medicine)
  • 김덕원 (연세대학교 의과대학 의용공학과) ;
  • 송철규 (연세대학교 의과대학 의용공학과) ;
  • 오인식 (연세대학교 의과대학 의용공학과) ;
  • 황수관 (연세대학교 의과대학 생리학교실) ;
  • 김원기 (연세대학교 의과대학 의용공학과)
  • Published : 1990.05.23
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Abstract

In this study, a new ensemble average technique was developed to measure cardiac output during treadmill exercise. Each dZ/dt peak (C point) was used as a starting point for ensemble averaging, instead of conventionally used R wave of ECG in order to prevent the peak dZ/dt waveform from blurring. In ease of using R wave as a reference, time interval from R wave to the peak of dZ/dt varies for each heart beat. Stroke volume, heart rate, and cardiac output of five male were successfully measured with Balke protocol using the new ensemble average technique.

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