Implantable cardioverter defibrillator implantation rates in the Olmsted County, Minnesota, population: 1989-1999.
Although the efficacy of implantable cardioverter defibrillators (ICDs) has been demonstrated in randomized clinical trials, implantation and survival rates have not been reported for a defined population. We performed a retrospective cohort analysis of Olmsted County, Minnesota residents (n = 70) who received their first ICD between 1 January 1989 and 31 December 1999. The ICD implantation rate increased from approximately 2.5/100,000 (95% confidence interval [CI], 0.9-4.1) in the first 4 years to 11.5/100,000 (95% CI, 6.7-16.2) in the last 2 years. Twenty-three patients (33%) received an appropriate ICD shock during the observation period. Based on these data, ICDs are estimated to reduce total mortality rates in this population by 0.3%. We conclude that, in patients drawn from a community setting with AHA/ACC class I indications for ICD implantation, implantation of ICDs appears to be highly efficacious in aborting potentially fatal events.
Wu
Lambert A
LA
Department of Internal Medicine/Division of Cardiovascular Diseases, Mayo Clinic and Foundation, 200 First Street SW, Rochester, MN 55905, USA.
Kottke
Thomas E
TE
Friedman
Paul A
PA
Luria
David M
DM
Grill
Diane E
DE
Maurer
Matthew J
MJ
D016757:Death, Sudden, Cardiac / Q000517:prevention & control; D017147:Defibrillators, Implantable / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D008297:Male; D008910:Minnesota / Q000453:epidemiology; D016019:Survival Analysis; D014693:Ventricular Fibrillation / Q000401:mortality* / Q000628:therapy