title: Coil occlusion of residual shunts after surgical closure of patent ductus arteriosus.
abstract: OBJECTIVE; To describe use of coil embolization to occlude residual flow through a patent ductus arteriosus (PDA) after incomplete surgical ligation.
  
  
  METHODS
  Clinical study.
  
  
  METHODS
  Dogs (n=4) with continuous murmur after surgical ligation of PDA.
  
  
  METHODS
  After PDA ligation, residual ductal flow through the PDA was visible on color-flow Doppler examination and left ventricular end-diastolic diameter remained increased. Coil embolization by an arterial approach was performed to achieve complete occlusion of the PDA.
  
  
  RESULTS
  Embolization coils were delivered without complications and hemodynamically successful occlusion was achieved. Doppler-visible flow resolved in 2 dogs within 3 months after embolization. Left ventricular end-diastolic diameter indexed to body weight decreased in all dogs.
  
  
  CONCLUSIONS
  Transcatheter coil embolization appears to be a safe and minimally invasive procedure for complete occlusion of residual PDA flow after incomplete surgical ligation.
  
  
  CONCLUSIONS
  Transcatheter coil embolization should be considered for correction of hemodynamically significant residual shunts in dogs that have incomplete PDA occlusion after open surgical ligation.
authors.affiliation: College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA. yoko_fujii@ncsu.edu
authors.forename: Yoko
authors.initials: Y
authors.lastname: Fujii
authors.forename: Bruce W
authors.initials: BW
authors.lastname: Keene
authors.forename: Kyle G
authors.initials: KG
authors.lastname: Mathews
authors.forename: Clarke E
authors.initials: CE
authors.lastname: Atkins
authors.forename: Teresa C
authors.initials: TC
authors.lastname: Defrancesco
authors.forename: Elizabeth M
authors.initials: EM
authors.lastname: Hardie
authors.forename: Yoshito
authors.initials: Y
authors.lastname: Wakao
mesh_terms: D000818:Animals; D004283:Dog Diseases / Q000000981:diagnostic imaging / Q000601:surgery* / Q000628:therapy*; D004285:Dogs; D004374:Ductus Arteriosus, Patent / Q000000981:diagnostic imaging / Q000601:surgery / Q000628:therapy / Q000662:veterinary*; D018618:Echocardiography, Doppler, Color / Q000662:veterinary; D004621:Embolization, Therapeutic / Q000379:methods / Q000662:veterinary*; D005260:Female; D008026:Ligation / Q000009:adverse effects / Q000662:veterinary; D008297:Male; D016896:Treatment Outcome