title: Embolotherapy for pulmonary arteriovenous malformations in patients without hereditary hemorrhagic telangiectasia.
abstract: OBJECTIVE
  To evaluate the clinical and radiological outcomes of transcatheter embolotherapy for treating sporadic pulmonary arteriovenous malformations (PAVMs) that were not associated with hereditary hemorrhagic telangiectasia.
  
  
  METHODS
  Between January 2001 and June 2008, thirty-five sporadic PAVMs were detected in 23 patients. The clinical follow up consisted of assessing the changes of the signs and symptoms of the PAVMs, and radiological evaluation with chest radiographs or chest CT scans.
  
  
  RESULTS
  The lower lung regions (63%) and peripheral locations (86%) were the common locations of the PAVMs. Thirty-four PAVMs (97%) had simple architecture (one arterial feeder within a single pulmonary segment). Technical success was achieved in 33 PAVMs (94%); two cases of technical failure were due to catheterization failure (n = 1) and too large a feeding artery (17 mm) that disabled embolotherapy (n = 1). Coils and Amplatz vascular plugs were used in 30 and three PAVMs, respectively. Inadvertent placement of one coil (n = 1) and pulmonary infarction (n = 1) occurred, but no relevant symptoms developed. For the 13 patients with available data, the mean arterial O(2) saturation changed significantly from 92% to 98%. Complete or near-complete involution of the sac was observed in 30 of the 33 embolized PAVMs (91%). In these 33 embolized PAVMs, the mean sac diameter significantly decreased from 17.83 mm to 0.68 mm.
  
  
  CONCLUSIONS
  Sporadic PAVMs are mostly the simple type with predominance in the lower lobe and peripheral locations. Transcatheter embolotherapy with coils or Amplatz vascular plugs is a safe and effective treatment for sporadic PAVMs and this provides excellent functional and radiological improvement.
authors.affiliation: Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea. jhshin@amc.seoul.kr
authors.forename: Ji Hoon
authors.initials: JH
authors.lastname: Shin
authors.forename: Soo Jin
authors.initials: SJ
authors.lastname: Park
authors.forename: Gi-Young
authors.initials: GY
authors.lastname: Ko
authors.forename: Hyun-Ki
authors.initials: HK
authors.lastname: Yoon
authors.forename: Dong-Il
authors.initials: DI
authors.lastname: Gwon
authors.forename: Jin-Hyoung
authors.initials: JH
authors.lastname: Kim
authors.forename: Kyu-Bo
authors.initials: KB
authors.lastname: Sung
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001165:Arteriovenous Malformations / Q000000981:diagnostic imaging / Q000628:therapy*; D002648:Child; D015331:Cohort Studies; D004621:Embolization, Therapeutic / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011651:Pulmonary Artery / Q000000981:diagnostic imaging*; D011667:Pulmonary Veins / Q000000981:diagnostic imaging*; D013683:Telangiectasia, Hereditary Hemorrhagic; D014057:Tomography, X-Ray Computed / Q000379:methods; D016896:Treatment Outcome; D055815:Young Adult
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