title: Evaluation of patient characteristics and utilisation of invasive cardiac procedures in a UK ethnic population with unstable angina pectoris.
abstract: OBJECTIVE
  To evaluate patient characteristics and utilisation of invasive cardiac procedures in a UK ethnic population with unstable angina pectoris (UAP).
  
  
  METHODS
  Retrospective, observational study.
  
  
  METHODS
  Tertiary referral cardiology centre in the United Kingdom serving a large Asian ethnic population.
  
  
  METHODS
  White and Asian patients undergoing PTCA for UAP over a 2.5-year period at a UK referral cardiology centre from a comprehensive PTCA database. Data were also collated for all emergency admissions with unstable angina, or angina (type unspecified), to our institute.
  
  
  METHODS
  Demographic and angiographic characteristics of patients undergoing PTCA. Frequency of usage of invasive cardiac procedures was determined in emergency angina admissions.
  
  
  RESULTS
  From January 1997 to July 1999, 435 White and 36 Asian patients underwent PTCA for UAP at our institute. Asian patients were on average 4.4 years younger (P=0.015), had 19.3% more diabetes (P=0.003) and 19.7% less smoking (P=0.007). Trends to more single vessel disease in Whites and more double vessel disease in Asians were observed, with similar rates of triple vessel disease. Interestingly, Asians also had trends towards more left-sided coronary artery disease and revascularisation, smaller vessels and less bail-out stenting. Asian patients were significantly less likely to undergo coronary angiography, OR 0.64 (CI 0.45-0.91, P=0.012), during the index admission, and showed a trend to less PTCA.
  
  
  CONCLUSIONS
  Asian patients with unstable angina pectoris appear to have clinical and angiographic differences from their White counterparts, and are less likely to have invasive cardiac procedures deployed. The reasons for these observations require elucidation and the prognostic significance of these findings is uncertain.
authors.affiliation: Department of Cardiology, Walsgrave Hospitals NHS Trust, Clifford Bridge Road, CV2 2DX, Coventry, UK.
authors.forename: J
authors.initials: J
authors.lastname: Trevelyan
authors.forename: E W
authors.initials: EW
authors.lastname: Needham
authors.forename: M
authors.initials: M
authors.lastname: Halim
authors.forename: H
authors.initials: H
authors.lastname: Singh
authors.forename: M
authors.initials: M
authors.lastname: Been
authors.forename: M F
authors.initials: MF
authors.lastname: Shiu
authors.forename: R K
authors.initials: RK
authors.lastname: Mattu
mesh_terms: D000368:Aged; D000789:Angina, Unstable / Q000208:ethnology* / Q000628:therapy*; D015906:Angioplasty, Balloon, Coronary / Q000706:statistics & numerical data*; D017023:Coronary Angiography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D006113:United Kingdom