title: Demographic and temporal trends in out of hospital sudden cardiac death in Belfast.
abstract: OBJECTIVE
  To determine the epidemiology of out of hospital sudden cardiac death (OHSCD) in Belfast from 1 August 2003 to 31 July 2004.
  
  
  METHODS
  Prospective examination of out of hospital cardiac arrests by using the Utstein style and necropsy reports. World Health Organization criteria were applied to determine the number of sudden cardiac deaths.
  
  
  RESULTS
  Of 300 OHSCDs, 197 (66%) in men, mean age (SD) 68 (14) years, 234 (78%) occurred at home. The emergency medical services (EMS) attended 279 (93%). Rhythm on EMS arrival was ventricular fibrillation (VF) in 75 (27%). The call to response interval (CRI) was mean (SD) 8 (3) minutes. Among patients attended by the EMS, 9.7% were resuscitated and 7.2% survived to leave hospital alive. The CRI for survivors was mean (SD) 5 (2) minutes and for non-survivors, 8 (3) minutes (p < 0.001). Ninety one (30%) OHSCDs were witnessed; of these 91 patients 48 (53%) had VF on EMS arrival. The survival rate for witnessed VF arrests was 20 of 48 (41.7%): all 20 survivors had VF as the presenting rhythm and CRI < or = 7 minutes. The European age standardised incidence for OHSCD was 122/100,000 (95% confidence interval 111 to 133) for men and 41/100,000 (95% confidence interval 36 to 46) for women.
  
  
  CONCLUSIONS
  Despite a 37% reduction in heart attack mortality in Ireland over the past 20 years, the incidence of OHSCD in Belfast has not fallen. In this study, 78% of OHSCDs occurred at home.
authors.affiliation: Regional Medical Cardiology Centre, Royal Victoria Hospital, Belfast, UK.
authors.forename: M J
authors.initials: MJ
authors.lastname: Moore
authors.forename: B M
authors.initials: BM
authors.lastname: Glover
authors.forename: C J
authors.initials: CJ
authors.lastname: McCann
authors.forename: N A
authors.initials: NA
authors.lastname: Cromie
authors.forename: P
authors.initials: P
authors.lastname: Ferguson
authors.forename: D C
authors.initials: DC
authors.lastname: Catney
authors.forename: F
authors.initials: F
authors.lastname: Kee
authors.forename: A A J
authors.initials: AA
authors.lastname: Adgey
mesh_terms: D000328:Adult; D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D001344:Autopsy; D003327:Coronary Disease / Q000401:mortality; D016757:Death, Sudden, Cardiac / Q000453:epidemiology*; D004632:Emergency Medical Services / Q000458:organization & administration; D005260:Female; D006801:Humans; D015994:Incidence; D007902:Length of Stay; D008297:Male; D008875:Middle Aged; D009026:Mortality / Q000639:trends; D009660:Northern Ireland; D011446:Prospective Studies; D012111:Residence Characteristics; D018487:Ventricular Dysfunction, Left / Q000401:mortality