title: Plaque characteristics of the coronary segment proximal to the culprit lesion in stable and unstable patients.
abstract: BACKGROUND
  Identifying vulnerable plaque is important for preventing an acute coronary event. The present study examined the relationship between the clinical presentation of coronary artery disease and the plaque characteristics of nonculprit segment assessed by virtual histology intravascular ultrasound (VH-IVUS).
  
  
  METHODS
  We performed VH-IVUS analysis on nonculprit segments with < 50% diameter stenosis in 91 patients (48 acute coronary syndrome [ACS] patients, 43 stable angina [SA] patients).
  
  
  RESULTS
  ACS patients showed significantly higher ratio of dense calcium (7.9% +/- 1.0% versus 5.0% +/- 0.9%, p = 0.03) and necrotic core plaque (13.7% +/- 1.1% versus 8.6% +/- 1.1%, p = 0.001) compared with SA patients. VH-IVUS-derived thin-cap fibroatheroma (VH-TCFA) was more frequently observed in ACS patients compared with SA patients (64.6% versus 35.7%, p = 0.006). Among ACS patients, plasma high sensitivity C-reactive protein (hs-CRP) levels were significantly higher in patients with VH-TCFA than in patients without VH-TCFA (7.9 +/- 2.6 mg/l versus 1.6 +/- 0.3 mg/l, p = 0.004).
  
  
  CONCLUSIONS
  ACS patients presented higher prevalence of VH-TCFA in nonculprit segment. Presence of VH-TCFA was associated with an increased level of plasma hs-CRP in ACS patients.
authors.affiliation: Cardiovascular Division, Jichi Medical University, Saitama Medical Center, Saitama, Japan. tomonaka@omiya.jichi.ac.jp
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Nakamura
authors.forename: Norifumi
authors.initials: N
authors.lastname: Kubo
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Funayama
authors.forename: Yoshitaka
authors.initials: Y
authors.lastname: Sugawara
authors.forename: Junya
authors.initials: J
authors.lastname: Ako
authors.forename: Shin-ichi
authors.initials: S
authors.lastname: Momomura
mesh_terms: D054058:Acute Coronary Syndrome / Q000000981:diagnostic imaging* / Q000209:etiology / Q000473:pathology; D000368:Aged; D000787:Angina Pectoris / Q000000981:diagnostic imaging* / Q000209:etiology / Q000473:pathology; D015415:Biomarkers / Q000097:blood; D002097:C-Reactive Protein / Q000378:metabolism; D002114:Calcinosis / Q000000981:diagnostic imaging; D023921:Coronary Stenosis / Q000150:complications / Q000000981:diagnostic imaging* / Q000473:pathology; D003331:Coronary Vessels / Q000000981:diagnostic imaging* / Q000473:pathology; D005260:Female; D005355:Fibrosis; D006801:Humans; D008297:Male; D008875:Middle Aged; D009336:Necrosis; D012720:Severity of Illness Index; D018084:Ultrasonography, Interventional; D015854:Up-Regulation; D014584:User-Computer Interface
chemical_list: D015415:Biomarkers; D002097:C-Reactive Protein