title: Electrophysiologic characteristics and outcome of segmental ostial superior vena cava isolation in patients with paroxysmal atrial fibrillation initiated by superior vena cava ectopy: comparison with pulmonary vein isolation.
abstract: BACKGROUND
  This study investigated the electrophysiologic characteristics and outcome of superior vena cava (SVC) segmental ostial isolation (SOI) in patients with SVC-initiated paroxysmal atrial fibrillation (PAF).
  
  
  METHODS
  Ninety-five patients with PAF underwent pulmonary vein (PV) SOI using a basket catheter whether the PAF originating from PVs was observed or not. Fifteen of those patients also underwent SVC SOI in the same manner due to evidence of SVC origin PAF.
  
  
  RESULTS
  The SVC musculature networks and electrical connections with the atrium (multiple separate electrical connections in 10, multiple separate musculature networks with separate electrical connections in 1, and a continuous broad electrical connection in 4 SVCs) were similar to those of the PV musculature. However, the occurrence of an electrical connection recovery after SOI in patients with recurrent atrial fibrillation was lower for SVCs (25%) than PVs (58%).
  
  
  CONCLUSIONS
  Superior vena cava SOI appears to have a lower recurrent conduction rate than PV SOI.
authors.affiliation: Division of Cardiology, Hamamatsu Medical Center, Hamamatsu, Japan.
authors.forename: Masahiro
authors.initials: M
authors.lastname: Muto
authors.forename: Takumi
authors.initials: T
authors.lastname: Yamada
authors.forename: Yoshimasa
authors.initials: Y
authors.lastname: Murakami
authors.forename: Taro
authors.initials: T
authors.lastname: Okada
authors.forename: Mitsuhiro
authors.initials: M
authors.lastname: Okamoto
authors.forename: Takeshi
authors.initials: T
authors.lastname: Shimizu
authors.forename: Junji
authors.initials: J
authors.lastname: Toyama
authors.forename: Yukihiko
authors.initials: Y
authors.lastname: Yoshida
authors.forename: Naoya
authors.initials: N
authors.lastname: Tsuboi
authors.forename: Teruo
authors.initials: T
authors.lastname: Ito
authors.forename: Takahisa
authors.initials: T
authors.lastname: Kondo
authors.forename: Yasuya
authors.initials: Y
authors.lastname: Inden
authors.forename: Makoto
authors.initials: M
authors.lastname: Hirai
authors.forename: Toyoaki
authors.initials: T
authors.lastname: Murohara
mesh_terms: D000328:Adult; D001281:Atrial Fibrillation / Q000175:diagnosis / Q000601:surgery*; D018780:Body Surface Potential Mapping; D005260:Female; D006329:Heart Conduction System / Q000601:surgery*; D006801:Humans; D008297:Male; D011667:Pulmonary Veins / Q000601:surgery*; D013479:Superior Vena Cava Syndrome / Q000601:surgery*; D016896:Treatment Outcome; D018879:Ventricular Premature Complexes / Q000175:diagnosis / Q000601:surgery*