title: Device size for transcatheter closure of ovoid interatrial septal defect.
abstract: BACKGROUND
  For successful transcatheter closure of an atrial septal defect with the Amplatzer septal occluder, the shape of the defect should be considered before selecting the device size. The purpose of this study was to evaluate the results of transcatheter closure of an ovoid atrial septal defect.
  
  
  METHODS
  Between January 2010 and February 2012, cardiac computer tomography examinations were performed in 78 patients who subsequently underwent transcatheter closure of an atrial septal defect. In this retrospective study, we reviewed these patients' medical records. We defined an ovoid atrial septal defect as a value of 0.75 for the ratio of the shortest diameter of the defect to the longest diameter, as measured in a computed tomography image. Transthoracic echocardiography examinations were made at 1 day and 6 months after the procedure.
  
  
  RESULTS
  Transcatheter closure of an atrial septal defect was successful in 26 patients in the ovoid-defect group and in 52 patients in the round-defect group. There were no serious complications in either group, and the rate of complete closure at 6 months was 92.3% in the ovoid-defect group and 93.1% in the round-defect group (P > .05). The mean (SD) difference between the device size and the defect's longest diameter, and the mean ratio of the device size to the longest diameter were significantly smaller in the ovoid-defect group (1.7 ± 2.9 versus 3.8 ± 2.5 and 1.1 ± 0.1 versus 1.3 ± 0.2, respectively).
  
  
  CONCLUSIONS
  Transcatheter closure of an atrial septal defect is indicated even for an ovoid atrial septal defect. Ovoid atrial septal defects can be closed successfully with smaller sizes of the Amplatzer septal occluder than for round atrial septal defects.
authors: Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul.
authors: Eun Hyun
authors: EH
authors: Cho
authors: Jinyoung
authors: J
authors: Song
authors: Eun Young
authors: EY
authors: Choi
authors: Sang Yoon
authors: SY
authors: Lee
mesh_terms: D000328:Adult; D006328:Cardiac Catheterization / Q000295:instrumentation* / Q000706:statistics & numerical data; D062906:Cardiac Catheters / Q000706:statistics & numerical data*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005260:Female; D006344:Heart Septal Defects, Atrial / Q000453:epidemiology* / Q000601:surgery*; D006801:Humans; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D017755:Prosthesis Fitting; D056910:Republic of Korea / Q000453:epidemiology; D012189:Retrospective Studies; D018570:Risk Assessment; D055989:Septal Occluder Device / Q000706:statistics & numerical data*; D016896:Treatment Outcome