title: Impact of coronary artery calcification on percutaneous coronary intervention and postprocedural complications.
abstract: BACKGROUND
  Excessive coronary calcification can lead to adverse outcomes after percutaneous coronary intervention (PCI). We therefore evaluated the impact of coronary calcium score (CCS) measured by multidetector computed tomography (MDCT) on immediate complications of PCI and rate of restenosis.
  
  
  METHODS
  We performed a single-center retrospective analysis of 84 patients with coronary stenosis diagnosed by MDCT who underwent PCI. The Agatston method was used to measure total, target-vessel, and segmental (stent deployment site) CCS.
  
  
  RESULTS
  In 108 PCI procedures, 32 lesions (29.5%) were American College of Cardiology/American Heart Association type A, 60 (55.5%) were type B, and 16 (15%) were type C. ANOVA showed significantly higher segmental CCS in type C than in type A lesions (29 ± 51 vs. 214 ± 162;p= 0.03). Six patients (7.1%) had periprocedural complications and seven (8.3%) had in-stent restenosis and angina. Mean total, target-vessel, and segmental CCS was significantly higher in complicated than in successful PCI (199 ± 325 vs. 816 ± 624,p= 0.001; 92 ± 207 vs. 337 ± 157,p= 0.001; and 79 ± 158 vs. 256 ± 142,p= 0.003, respectively), but there was no significant difference in CCS between successful PCI and PCI complicated by late restenosis.
  
  
  CONCLUSIONS
  CCS measured by MDCT has an important role in predicting early, but not late, complications from PCI.
authors.affiliation: Department of Cardiology, Cardiac Imaging Department, Prince Sultan Cardiac Center, Qassim PSCCQ, Buraydah, aSaudi Arabia.
authors.forename: Rami M
authors.initials: RM
authors.lastname: Abazid
authors.affiliation: Department of Cardiology, Prince Sultan Cardiac Center, Qassim PSCCQ, Buraydah, bSaudi Arabia.
authors.forename: M
authors.initials: M
authors.lastname: Obadah Kattea
authors.affiliation: Department of Cardiology, Cardiac Imaging Department, Prince Sultan Cardiac Center, Qassim PSCCQ, Buraydah, aSaudi Arabia.
authors.forename: Osama A
authors.initials: OA
authors.lastname: Smettei
authors.affiliation: Department of Cardiology, Invasive Department, Prince Sultan Cardiac Center, Qassim PSCCQ, Buraydah, cSaudi Arabia.
authors.forename: Yasir
authors.initials: Y
authors.lastname: Beshir
authors.affiliation: Department of Cardiology, Invasive Department, Prince Sultan Cardiac Center, Qassim PSCCQ, Buraydah, cSaudi Arabia.
authors.forename: Haitham
authors.initials: H
authors.lastname: Sakr
keywords: Coronary calcification; In-stent restenosis; Multidetector computed tomography; Percutaneous coronary intervention; Periprocedural complications