title: Angioscopy after laser and balloon coronary angioplasty.
abstract: OBJECTIVE
  Percutaneous intracoronary angioscopy was used to study the morphologic changes occurring in coronary arteries after balloon or laser angioplasty.
  
  
  BACKGROUND
  Angioscopy is thought to provide details of the coronary vessel lumen and the inner wall.
  
  
  METHODS
  Coronary lesions were studied in 44 patients with a 4.5F Imagecath angioscope before and after each interventional procedure. Balloon and laser angioplasty were performed in 21 (group I) and 23 patients (group II), respectively. There was no difference in age, gender or angiographic lesion appearance before the procedure between the two groups.
  
  
  RESULTS
  Circumferential visualization of the target lesion was successfully completed in 17 group I and 19 group II patients. A larger lumen than that observed at baseline was seen in all 17 group I and in 13 of the 19 group II patients. Tissue remnants were observed in all group I and II patients. Laser irradiation resulted in characteristic sharp-edged craters. Dissection was identified in 2 of 19 patients before versus 9 of 19 patients after balloon angioplasty (p < 0.05) and in 0 of 23 patients before versus 4 of 23 patients after laser angioplasty (p = NS). Subintimal hemorrhage was observed in 3 of 19 patients before versus 11 of 19 patients after balloon angioplasty (p < 0.05) and in 2 of 23 patients before versus 4 of 23 patients after laser angioplasty (p = NS). The frequency of hemorrhage was higher in group I than in group II (11 of 19 vs. 4 of 23, respectively, p < 0.02).
  
  
  CONCLUSIONS
  Angioscopy provides valuable information on lesion morphology after coronary interventions. Balloon dilation results in a high rate of dissection and subintimal hemorrhage. Laser angioplasty is able to ablate obstructing tissue and results in a lower rate of subintimal hemorrhage than balloon dilation.
authors.affiliation: University Hospital Henri-Mondor, University of Paris XII, Créteil, France.
authors.forename: F S
authors.initials: FS
authors.lastname: Larrazet
authors.forename: P J
authors.initials: PJ
authors.lastname: Dupouy
authors.forename: J L
authors.initials: JL
authors.lastname: Rande
authors.forename: A
authors.initials: A
authors.lastname: Hirosaka
authors.forename: J
authors.initials: J
authors.lastname: Kvasnicka
authors.forename: H J
authors.initials: HJ
authors.lastname: Geschwind
mesh_terms: D000368:Aged; D015906:Angioplasty, Balloon, Coronary / Q000295:instrumentation / Q000379:methods / Q000706:statistics & numerical data; D017222:Angioplasty, Balloon, Laser-Assisted / Q000295:instrumentation / Q000379:methods / Q000706:statistics & numerical data; D020677:Angioscopes; D017546:Angioscopy / Q000379:methods / Q000706:statistics & numerical data; D016009:Chi-Square Distribution; D003327:Coronary Disease / Q000150:complications / Q000453:epidemiology / Q000601:surgery; D003331:Coronary Vessels / Q000473:pathology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000175:diagnosis / Q000453:epidemiology