Chinese Science Bulletin

, Volume 47, Issue 21, pp 1845–1848 | Cite as

Lyapunov exponents for synchronous 12-lead ECG signals

  • Zhenzhou Wang
  • Zheng Li
  • Yixiang Wei
  • Xinbao Ning
  • Yuzheng Lin


The Lyapunov exponents of synchronous 12-lead ECG signals have been investigated for the first time using a multi-sensor (electrode) technique. The results show that the Lyapunov exponents computed from different locations on the body surface are not the same, but have a distribution characteristic for the ECG signals recorded from coronary artery disease (CAD) patients with sinus rhythms and for signals from healthy older people. The maximum Lyapunov exponent L 1 of all signals is positive. While all the others are negative, so the ECG signal has chaotic characteristics. With the same leads, L 1 of CAD patients is less than that of healthy people, so the CAD patients and healthy people can be classified by L 1, L 1 therefore has potential values in the diagnosis of heart disease.


CAD multi-sensor synchronous 12-lead ECG Lyapunov exponents chaos 


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Copyright information

© Science in China Press 2002

Authors and Affiliations

  • Zhenzhou Wang
    • 1
  • Zheng Li
    • 1
  • Yixiang Wei
    • 1
  • Xinbao Ning
    • 2
  • Yuzheng Lin
    • 1
  1. 1.Department of Engineering PhysicsTsinghua UniversityBeijingChina
  2. 2.Department of Electronic Science and EngineeringNanjing UniversityNanjingChina

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