title: [Location of the pre-excitation part in Wolff-Parkinson-White syndrome by Doppler tissue imaging].
abstract: OBJECTIVE
  To evaluate the feasibility of newly developed Doppler tissue imaging (DTI) for locating the early contraction sites in Wolff-Parkinson-White (WPW) syndrome.
  
  
  METHODS
  The time-sequential changes in ventricular wall motion of thirty-three patients suffering from WPW syndrome were examined by DTI. The pre-excitation site was represented as a red region appearing on the myocardium right after the delta wave of the electrocardiogram and confirmed by electrophysiology.
  
  
  RESULTS
  Of 21 patients with left-sided accessory pathways, the early contractive sites were correctly identified by DTI in 18 patients, while the sites were determined by DTI in 8 of 12 patients with right-sided accessory pathways. There was no significant difference between the two groups (P > 0.05).
  
  
  CONCLUSIONS
  The DTI system is helpful to localize the accessory pathways and evaluate the results after radiofrequency ablation.
authors.affiliation: Department of Ultrasonography, Second Xiangya Hospital, Central South University, Changsha 410011, China.
authors.forename: M
authors.initials: M
authors.lastname: Zhang
authors.forename: Q C
authors.initials: QC
authors.lastname: Zhou
authors.forename: P
authors.initials: P
authors.lastname: Fan
mesh_terms: D000293:Adolescent; D000328:Adult; D017115:Catheter Ablation; D002648:Child; D018618:Echocardiography, Doppler, Color; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D014927:Wolff-Parkinson-White Syndrome / Q000000981:diagnostic imaging* / Q000601:surgery