title: [Influence of heart rhythm, breathing and arm position during computed tomography scanning on the registration accuracy of electro anatomical map (EAM) images, left atrium three-dimensional computed tomography angiography images, and fluoroscopy time during ablation to treat atrial fibrillation].
abstract: BACKGROUND
  In CARTOMERGE(®) for treatment of atrial fibrillation (AF) by ablation, by integrating electro anatomical map (EAM) and left atrium three-dimensional computed tomography angiography (3D-CTA) images, identification of the ablation points is simplified and the procedure can be made carried out more rapidly. However, the influence that heart rhythm, breathing and arm position during CT scanning have on registration accuracy and fluoroscopy time is not clear.
  
  
  OBJECTIVE
  To clarify the influence on registration accuracy and fluoroscopy time of heart rhythm, breathing and arm position during CT scanning.
  
  
  METHODS
  The patients were CT-scanned during both sinus rhythm (SR) and AF in each study subject. We evaluated the registration accuracy of images reconstructed between the cardiac cycle and assessed the registration accuracy and fluoroscopy time of images obtained during inspiratory breath-hold, expiratory breath-hold and up and down position of the arm.
  
  
  RESULTS
  Although the registration accuracy of the EAM image and left atrium 3D-CTA image showed a significant difference during SR, no significant difference was seen during AF. Expiratory breath-hold and down position of the arm resulted in the highest registration accuracy and the shortest fluoroscopy time. However, arm position had no significant effect on registration accuracy.
  
  
  CONCLUSIONS
  Heart rhythm and breathing during CT scanning have a significant effect on the registration accuracy of EAM images, left atrium 3D-CTA images, and fluoroscopy time.
authors: Division of Radiology, Sapporo Medical University Hospital, Japan.
authors: Taiki
authors: T
authors: Chono
authors: Shinya
authors: S
authors: Shimoshige
authors: Kenta
authors: K
authors: Yoshikawa
authors: Kazuhusa
authors: K
authors: Mizonobe
authors: Keishi
authors: K
authors: Ogura
mesh_terms: D000792:Angiography; D001132:Arm / Q000502:physiology*; D001281:Atrial Fibrillation / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000628:therapy*; D018780:Body Surface Potential Mapping / Q000379:methods*; D017115:Catheter Ablation; D005260:Female; D005471:Fluoroscopy; D006325:Heart Atria / Q000000981:diagnostic imaging; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged; D012119:Respiration; D014057:Tomography, X-Ray Computed