The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Stepwise Detection of the QRS Complex in the ECG Signal

심전도 신호에서 QRS군의 단계적 검출

  • Kim, Jeong-Hong (Kyungpook National University. School of Computer Science and Engineering) ;
  • Lee, SeungMin (Kyungpook National University Graduate School of Electronics Engineering) ;
  • Park, Kil-Houm (Kyungpook National University Graduate School of Electronics Engineering)
  • Received : 2015.08.17
  • Accepted : 2015.11.28
  • Published : 2016.02.29
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Abstract

The QRS complex of ECG signal represents the depolarization and repolarization activities in the cells of ventricle. Accurate informations of $QRS_{onset}$ and $QRS_{offset}$ are needed for automatic analysis of ECG waves. In this study, using the amount of change in the QRS complex voltage values and the distance from the $R_{peak}$, we determined the junction point from Q-wave to R-wave and the junction point from R-wave to S-wave. In the next step, using the integral calculation based on the connection point, we detected $QRS_{onset}$ and $QRS_{offset}$. We use the PhysioNet QT database to evaluate the performances of the algorithm, and calculate the mean and standard deviation of the differences between onsets or offsets manually marked by cardiologists and those detected by the proposed algorithm. The experiment results show that standard deviations are under the tolerances accepted by expert physicians, and outperform the results obtained by the other algorithms.

ECG 신호에서 QRS군은 매우 중요한 심실의 탈분극 상태 정보를 제공한다. 자동으로 심전도 신호를 분석하기 위해서는 $QRS_{onset}$ 과 $QRS_{offset}$ 에 대한 정확한 정보가 중요하다. 본 연구에서는 먼저 QRS군의 전위값 변화량 및 $R_{peak}$ 와의 거리를 이용하여 Q파와 R파의 접속 부분 그리고 R파와 S파의 접속 부분을 구하였다. 다음 단계에서는 이를 기준으로 적분연산을 이용하여 $QRS_{onset}$ 과 $QRS_{offset}$ 을 검출하였다. 알고리즘의 성능을 평가하기위해 PhysioNet QT database를 사용하여 심장 전문의가 수작업으로 표시한 결과에 대한 평균과 표준편차를 계산하였다. 실험결과에서 제안한 알고리즘의 표준편차는 전문의사가 수용할 수 있는 허용치 범위 안에 속하며, 다른 알고리즘보다 더 우수함을 나타낸다.

Keywords

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