title: Fusion of electroanatomical activation maps and multislice computed tomography to guide ablation of a focal atrial tachycardia in a fontan patient.
abstract: BACKGROUND
  Ablation of atrial tachycardia (AT) occurring late after cardiac surgery for congenital heart disease can be challenging due to the complexity of the arrhythmogenic substrate.
  
  
  RESULTS
  We performed an ablation procedure in a Fontan patient with an AT using a new approach combining 3D electroanatomical mapping with multislice computed tomography (MSCT). This technique visualizes the position of the catheter in relation to the endocardium, thereby improving delineation of scar tissue. The AT had a focal origin located between areas of scar tissue and was successfully ablated at the earliest activated site.
  
  
  CONCLUSIONS
  Ablation of complex arrhythmias can be facilitated by fusion of electroanatomical map and MSCT.
authors.affiliation: Department of Cardiology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands.
authors.forename: Laurens F
authors.initials: LF
authors.lastname: Tops
authors.forename: Natasja M S
authors.initials: NM
authors.lastname: de Groot
authors.forename: Jeroen J
authors.initials: JJ
authors.lastname: Bax
authors.forename: Martin J
authors.initials: MJ
authors.lastname: Schalij
mesh_terms: D000015:Abnormalities, Multiple / Q000601:surgery*; D000328:Adult; D018780:Body Surface Potential Mapping / Q000379:methods*; D017115:Catheter Ablation; D003937:Diagnosis, Differential; D018729:Fontan Procedure; D006344:Heart Septal Defects, Atrial / Q000601:surgery; D006801:Humans; D008297:Male; D013612:Tachycardia, Ectopic Atrial / Q000150:complications / Q000175:diagnosis* / Q000601:surgery; D014057:Tomography, X-Ray Computed / Q000379:methods*; D014188:Transposition of Great Vessels / Q000601:surgery; D018785:Tricuspid Atresia / Q000601:surgery