title: Current trends in stenting for aortic coarctation in Japan: Subanalysis of Japanese Society of Pediatric Interventional Cardiology (JPIC) stent survey.
abstract: BACKGROUND
  Stenting for aortic coarctation (CoA) has been accepted as an alternative to surgery for adolescents and adults, but only a few case have been reported in Japan. The purpose of this study was to provide a detailed review of Japanese national data on stenting of CoA.
  
  
  METHODS
  In a subanalysis of the data of the Japanese Society of Pediatric Interventional Cardiology (JPIC), we identified 35 patients with CoA who underwent stenting. We analyzed procedural characteristics including factors that may have contributed to hemodynamic effectiveness, and we compared these parameters between the patients under and over 15 years of age.
  
  
  RESULTS
  The mean ratio of balloon diameter/minimum lumen diameter (MLD) before stenting was 1.7 (range, 1.2-4.0), and the mean difference between the balloon diameter and the reference vessel diameter was -0.7 mm (range, -5.0 to +3.0 mm). %MLD/balloon diameter, which was defined as [(balloon diameter - MLD after dilation)/balloon diameter] × 100 predicted achievement of <10 mmHg pressure gradient after stenting. The sensitivity and the specificity of its cut-off of 7% were 93% and 47% (AUC, 0.7), respectively. There was no statistical difference between the two age groups under and over 15 years of age, in terms of selection criteria of stent size, balloon type used for deployment and immediate angiographic and hemodynamic result.
  
  
  CONCLUSIONS
  Stenting for CoA was clinically effective with few complications in Japan, even in patients not fully grown.
authors.affiliation: Cardiovascular Center, Showa University Northern Yokohama Hospital, Yokohama, Japan.
authors.forename: Takanari
authors.initials: T
authors.lastname: Fujii
authors.affiliation: Cardiovascular Center, Showa University Northern Yokohama Hospital, Yokohama, Japan.
authors.forename: Hideshi
authors.initials: H
authors.lastname: Tomita
authors.affiliation: Division of Pediatric Cardiology, Department of Pediatrics, Okayama University, Okayama, Japan.
authors.forename: Shinichi
authors.initials: S
authors.lastname: Otsuki
authors.affiliation: Department of Pediatric Cardiology, Saitama Medical University International Medical Center, Hidaka, Japan.
authors.forename: Toshiki
authors.initials: T
authors.lastname: Kobayashi
authors.affiliation: Department of Cardiology, Shizuoka Children's Hospital, Shizuoka, Japan.
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Ono
authors.affiliation: Department of Pediatric Cardiology, National Cerebral and Cardiovascular Center, Osaka, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Yazaki
authors.affiliation: Department of Cardiology, Shizuoka Children's Hospital, Shizuoka, Japan.
authors.forename: Sung-Hae
authors.initials: SH
authors.lastname: Kim
authors.affiliation: Department of Pediatric Cardiology, Tokyo Women's Medical University, Tokyo, Japan.
authors.forename: Toshio
authors.initials: T
authors.lastname: Nakanishi
mesh_terms: D000293:Adolescent; D000328:Adult; D000800:Angioplasty, Balloon / Q000009:adverse effects / Q000639:trends*; D001017:Aortic Coarctation / Q000601:surgery*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006439:Hemodynamics; D006801:Humans; D007223:Infant; D007564:Japan; D008297:Male; D012189:Retrospective Studies; D012680:Sensitivity and Specificity; D012955:Societies, Medical; D015607:Stents / Q000009:adverse effects / Q000639:trends*; D011795:Surveys and Questionnaires; D016896:Treatment Outcome; D055815:Young Adult
keywords: aortic coarctation; congenital heart disease; interventional cardiology; stent; structural heart disease