title: [Assessment of left ventricular systolic synchronicity by quantitative tissue velocity imaging in patients with left ventricular noncompaction].
abstract: OBJECTIVE
  To assess left ventricular systolic synchronicity by quantitative tissue velocity imaging (QTVI) in patients with left ventricular noncompaction (LVNC).
  
  
  METHODS
  Eighteen LVNC patients and 30 healthy controls were included. Two-dimensional echocardiography, QTVI was applied on parasternal long axis view, apical two-chamber and four-chamber view. Tissue velocity curve was obtained from the middle and basal segments of left ventricular posterior, lateral, septal, anterior, inferior and anteroseptal walls. Time interval from the beginning of QRS complex to the peak systolic velocity (Q-Ts) and the maximal difference in Ts among all 12 LV segments (Max-DeltaTs) was calculated.
  
  
  RESULTS
  Q-Ts from basal and middle segments of left ventricular inferior, lateral and posterior walls was significantly prolonged in LVNC patients compared to controls (P < 0.001). Max-DeltaTs was also significantly increased in LVNC patients [(161.9 +/- 93.2) ms] than that in controls [(61.2 +/- 27.4) ms, P < 0.001].
  
  
  CONCLUSIONS
  There was significant left ventricular asynchronies in patients with LVNC and delayed systolic contraction occurred mostly in the basal and middle segments of left ventricular inferior, posterior and lateral walls.
authors.affiliation: Department of Cardiology of Renmin Hospital, Peking University, Beijing 100044, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Zhao
authors.forename: Da-yi
authors.initials: DY
authors.lastname: Hu
authors.forename: Ji-hong
authors.initials: JH
authors.lastname: Guo
authors.forename: Fei-fei
authors.initials: FF
authors.lastname: Zhang
authors.forename: Wen-jie
authors.initials: WJ
authors.lastname: Lu
authors.forename: Zhen-wen
authors.initials: ZW
authors.lastname: Huang
authors.forename: Chun-guang
authors.initials: CG
authors.lastname: Qiu
authors.forename: Xue-bin
authors.initials: XB
authors.lastname: Li
authors.forename: Ping
authors.initials: P
authors.lastname: Zhang
authors.forename: Long
authors.initials: L
authors.lastname: Wang
authors.forename: Xiao-jun
authors.initials: XJ
authors.lastname: Yu
authors.forename: Fei
authors.initials: F
authors.lastname: He
authors.forename: Rui-yun
authors.initials: RY
authors.lastname: Liu
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D009202:Cardiomyopathies / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D016022:Case-Control Studies; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009200:Myocardial Contraction; D014463:Ultrasonography; D018487:Ventricular Dysfunction, Left / Q000000981:diagnostic imaging* / Q000503:physiopathology; D055815:Young Adult