title: Blood platelet count and reactivity are associated with restenosis 6 months after coronary angioplasty.
abstract: OBJECTIVE
  Restenosis occurs in 40-50% of patients treated with percutaneous transluminal coronary angioplasty (PTCA). Some data indicate that platelet derived growth factor (PDGF) plays a pathogenetic role. The aims of the present study were to measure the plasma levels of PDGF across the coronary circulation during PTCA and relate them to the development of restenosis.
  
  
  RESULTS
  Blood samples from the aortic root and coronary sinus were drawn simultaneously before, and after completed PTCA in 26 patients. Plasma levels of PDGF and beta-thromboglobulin (BTG), as well as platelet counts were measured. Restenosis was evaluated by quantitative coronary angiography after 6 months. Significant increases both in PDGF and BTG were encountered in the aortic root after PTCA in patients who developed restenosis as compared to patients without restenosis. Patients who developed restenosis also had significantly higher platelet counts compared to those without.
  
  
  CONCLUSIONS
  Increases in plasma PDGF and BTG in the aortic root after PTCA seem to be markers for restenosis 6 months after PTCA. This finding may strengthen the hypothesis that platelets contribute to the process of restenosis.
authors.affiliation: Department of Cardiology, Ullevaal University Hospital, Oslo, Norway. odjo@uus.no
authors.forename: O
authors.initials: O
authors.lastname: Johansen
authors.forename: M
authors.initials: M
authors.lastname: Brekke
authors.forename: I
authors.initials: I
authors.lastname: Seljeflot
authors.forename: A G
authors.initials: AG
authors.lastname: Semb
authors.forename: H
authors.initials: H
authors.lastname: Arnesen
mesh_terms: D017677:Age Distribution; D000368:Aged; D015906:Angioplasty, Balloon, Coronary / Q000009:adverse effects* / Q000379:methods; D015415:Biomarkers / Q000097:blood; D006328:Cardiac Catheterization; D017023:Coronary Angiography; D003327:Coronary Disease / Q000097:blood* / Q000000981:diagnostic imaging / Q000628:therapy*; D023903:Coronary Restenosis / Q000175:diagnosis* / Q000453:epidemiology; D005260:Female; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D015539:Platelet Activation / Q000502:physiology; D010976:Platelet Count; D010982:Platelet-Derived Growth Factor / Q000032:analysis*; D011336:Probability; D011379:Prognosis; D018570:Risk Assessment; D012494:Sampling Studies; D012720:Severity of Illness Index; D017678:Sex Distribution; D018709:Statistics, Nonparametric; D016019:Survival Analysis; D013997:Time Factors
chemical_list: D015415:Biomarkers; D010982:Platelet-Derived Growth Factor