title: Prevalence of parameters of suboptimal scaffold deployment following angiographic guided bioresorbable vascular scaffold implantation in real world practice - an optical coherence tomography analysis.
abstract: OBJECTIVE
  To assess the prevalence of suboptimal bioresorbable vascular scaffold (BVS, Abbott Vascular, Santa Clara, California) deployment in real world practice with intracoronary optical coherence tomography (OCT) imaging.
  
  
  METHODS
  Consecutive patients who underwent percutaneous coronary intervention using BVS and the final optimization assessed with OCT imaging in two tertiary care centers between December 2012 and February 2015 were evaluated for parameters of suboptimal scaffold deployment by OCT.
  
  
  RESULTS
  Overall, 36 scaffolds were implanted in 27 patients during this period. Mean age of the population was 54.7±8.2years and 19 (70.4%) were type B2/C lesions. The prevalence of parameters of suboptimal scaffold deployment were: underexpansion-22(61.1%), geographic miss-3(8.3%), tissue prolapse-7(25.9%), scaffold pattern irregularity-1(2.8%), longitudinal elongation-7(38.8%). Of the 7 overlaps imaged: excessive overlap was observed in 3 and scaffold gap in one. The median duration of follow up was 679days (range 193-963days). There were four events during this period. None were associated with suboptimal scaffold deployment.
  
  
  CONCLUSIONS
  OCT based parameters of suboptimal scaffold deployment are common in real world scenario and were not associated with adverse outcomes on long term follow up. These findings need to be confirmed in larger studies.
authors.affiliation: Institute of Cardiovascular Diseases, The Madras Medical Mission, Chennai, India. Electronic address: drkumarvijay@gmail.com.
authors.forename: Vijayakumar
authors.initials: V
authors.lastname: Subban
authors.affiliation: Department of Cardiology, Apollo Hospitals, Chennai, India.
authors.forename: Gunasekaran
authors.initials: G
authors.lastname: Sengottuvelu
authors.affiliation: Institute of Cardiovascular Diseases, The Madras Medical Mission, Chennai, India.
authors.forename: Kalaichelvan
authors.initials: K
authors.lastname: Uthayakumaran
authors.affiliation: Department of Cardiology, Apollo Hospitals, Chennai, India.
authors.forename: Ravindran
authors.initials: R
authors.lastname: Rajendran
authors.affiliation: Institute of Cardiovascular Diseases, The Madras Medical Mission, Chennai, India.
authors.forename: Ezhilan
authors.initials: E
authors.lastname: Janakiraman
authors.affiliation: Institute of Cardiovascular Diseases, The Madras Medical Mission, Chennai, India.
authors.forename: Balaji
authors.initials: B
authors.lastname: Pakshirajan
authors.affiliation: Institute of Cardiovascular Diseases, The Madras Medical Mission, Chennai, India.
authors.forename: Jose G
authors.initials: JG
authors.lastname: Thenpally
authors.affiliation: Institute of Cardiovascular Diseases, The Madras Medical Mission, Chennai, India.
authors.forename: Latchumanadhas
authors.initials: L
authors.lastname: Kalidoss
authors.affiliation: Institute of Cardiovascular Diseases, The Madras Medical Mission, Chennai, India.
authors.forename: Suma M
authors.initials: SM
authors.lastname: Victor
authors.affiliation: Department of Cardiology, Apollo Hospitals, Chennai, India.
authors.forename: Mathew Samuel
authors.initials: MS
authors.lastname: Kalarickal
authors.affiliation: Institute of Cardiovascular Diseases, The Madras Medical Mission, Chennai, India.
authors.forename: Mullasari S
authors.initials: MS
authors.lastname: Ajit
mesh_terms: D020341:Absorbable Implants; D001807:Blood Vessel Prosthesis / Q000639:trends; D017023:Coronary Angiography / Q000379:methods* / Q000639:trends; D003324:Coronary Artery Disease / Q000000981:diagnostic imaging / Q000601:surgery; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D062645:Percutaneous Coronary Intervention / Q000379:methods* / Q000639:trends; D015995:Prevalence; D012189:Retrospective Studies; D054457:Tissue Scaffolds; D041623:Tomography, Optical Coherence / Q000379:methods*
keywords: Bioresorbable vascular scaffold; Optical coherence tomography; Suboptimal implantation