title: Serial six year quantitative angiographic follow up in asymptomatic patients following successful coronary angioplasty.
abstract: OBJECTIVE
  To evaluate long term (six years) lumen changes after balloon angioplasty by using quantitative coronary angiography.
  
  
  METHODS
  Complete serial quantitative coronary angiography (before and after angioplasty and at six months, three years, and six years) was performed in 100 patients with successful angioplasty and without subsequent repeated revascularisation. In all, 198 dilated segments were compared with 395 non-dilated segments that were obtained from non-target arteries of study patients.
  
  
  RESULTS
  From six months to three years after angioplasty, minimum lumen diameter (MLD) increased significantly by 0.13 (0.28) (mean (SD)) mm in dilated segments and decreased significantly by 0.04 (0.27) mm in non-dilated segments. From three years to six years, MLD remained stable in dilated segments but decreased further (by 0.04 (0.28) mm) in non-dilated segments. Consequently, the DeltaMLD between six months and six years was larger in dilated segments than in non-dilated segments (0.12 (0.32) v -0.08 (0.34); p < 0.001). Further, DeltaMLD from six months to six years correlated positively with the percentage diameter stenosis (DS) at six months in each group (dilated segments r = 0.47, p < 0.0001; non-dilated segments r = 0.49, p < 0.0001). Multivariate analysis showed that the only independent predictor of DeltaMLD over six years for each group was the DS at six months.
  
  
  CONCLUSIONS
  Lesion regression occurs within the first three years after angioplasty and reaches a plateau thereafter. Moreover, the stenosis severity at six months predicts the magnitude of late regression after angioplasty.
authors.affiliation: Department of Cardiology, Osaka Medical Centre for Cancer and Cardiovascular Diseases, 1-3-3 Nakamichi, Higashinariku, Osaka City, Osaka 537-8511, Japan. takeda@xk9.so-net.ne.jp
authors.forename: Y
authors.initials: Y
authors.lastname: Takeda
authors.forename: T
authors.initials: T
authors.lastname: Kobayashi
authors.forename: N
authors.initials: N
authors.lastname: Awata
authors.forename: S
authors.initials: S
authors.lastname: Sato
authors.forename: J H C
authors.initials: JH
authors.lastname: Reiber
authors.forename: T
authors.initials: T
authors.lastname: Nakagawa
authors.forename: E
authors.initials: E
authors.lastname: Tsuchikane
authors.forename: O
authors.initials: O
authors.lastname: Katoh
authors.forename: M
authors.initials: M
authors.lastname: Kirino
authors.forename: T
authors.initials: T
authors.lastname: Kobayashi
authors.forename: K
authors.initials: K
authors.lastname: Yachiku
authors.forename: N
authors.initials: N
authors.lastname: Shibata
mesh_terms: D000328:Adult; D000368:Aged; D000704:Analysis of Variance; D015906:Angioplasty, Balloon, Coronary; D017023:Coronary Angiography; D003327:Coronary Disease / Q000000981:diagnostic imaging / Q000628:therapy*; D023903:Coronary Restenosis / Q000000981:diagnostic imaging; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D013997:Time Factors; D016896:Treatment Outcome