title: Research on coupling relationship between ECG and PW signal in the cardiovascular system.
abstract: BACKGROUND
  Cardiovascular disease (CVD) has become the main cause of morbidity and mortality world-wide.
  
  
  OBJECTIVE
  In order to obtain the potential function of cardiovascular system information further, the parameters of the coupling relationship between Electrocardiogram (ECG) signal and Pulse Wave (PW) signal are proposed.
  
  
  METHODS
  In this paper, we detected the peaks of ECG and PW signal synchronously from the Fantasia database using Empirical Mode Decomposition (EMD) algorithm, and analyzed the interval between different age groups in the same domain, then calculating the Euclidean distance to characterize the coupling relationship.
  
  
  RESULTS
  Via the experimental results of 20 subjects, the parameters of the old group were always larger than the young group. Thus the synchronization and consistency for PW following the ECG are weaker than the young group, which is in keeping with the clinical rule.
  
  
  CONCLUSIONS
  The conclusion is that there is a certain representation for the cardiovascular system with the coupling relationship parameter proposed.
authors.forename: Fangfang
authors.initials: F
authors.lastname: Jiang
authors.forename: Shaoxiu
authors.initials: S
authors.lastname: Song
authors.forename: Jiabin
authors.initials: J
authors.lastname: Cheng
authors.forename: Siliang
authors.initials: S
authors.lastname: He
authors.forename: Xiao
authors.initials: X
authors.lastname: Yang
mesh_terms: D000465:Algorithms; D004562:Electrocardiography / Q000379:methods*; D006801:Humans; D063177:Pulse Wave Analysis / Q000379:methods*; D012815:Signal Processing, Computer-Assisted
keywords: ECG; EMD; PW; cardiovascular system; coupling relationship