title: [Assessment of intraventricular mechanical synchrony in systole by tissue synchronization imaging in normal subjects].
abstract: OBJECTIVE
  To evaluate intraventricular mechanical synchrony in systole by real-time tri-plane tissue synchronization imaging (TSI).
  
  
  METHODS
  Real-time tri-plane TSI was performed in 20 normal subjects, and the apical 4-chamber, 2-chamber and long-axis views of the left ventricular (LV) were obtained simultaneously. The data were post-processed offline, and a TSI surface map of LV colorized according to the time-to-positive peak systolic velocity (TTP) was generated to reflect the segment TTP semi-quantitatively. The segmental TTP of the six-basal and six-mid segments of LV was measured and compared.
  
  
  RESULTS
  The myocardium was color-coded mainly by well-distributed green, and only a small portion displayed yellow or red color in the apical area; the TTP showed no significant differences between the segments measured (P>0.05).
  
  
  CONCLUSIONS
  In normal subjects, the long-axis systolic motions of the LV are highly synchronized. TSI allows immediate visual identification of intraventricular mechanical synchrony and quantitative measurement of regional TTP.
authors.affiliation: Department of Cardiovascular Surgery, General Hospital of PLA, Beijing 100853, China. wyecg@163.com
authors.forename: Yao
authors.initials: Y
authors.lastname: Wang
authors.forename: Chang-qing
authors.initials: CQ
authors.lastname: Gao
authors.forename: Yang
authors.initials: Y
authors.lastname: Wu
authors.forename: Chong-lei
authors.initials: CL
authors.lastname: Ren
authors.forename: Dong
authors.initials: D
authors.lastname: Li
authors.forename: Tao
authors.initials: T
authors.lastname: Zhao
mesh_terms: D000328:Adult; D000368:Aged; D018618:Echocardiography, Doppler, Color; D005260:Female; D006352:Heart Ventricles / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009200:Myocardial Contraction / Q000502:physiology*; D013599:Systole / Q000502:physiology*; D016277:Ventricular Function, Left; D055815:Young Adult