title: Burden of systolic and diastolic ventricular dysfunction in the community: appreciating the scope of the heart failure epidemic.
abstract: BACKGROUND
  Approximately half of patients with overt congestive heart failure (CHF) have diastolic dysfunction without reduced ejection fraction (EF). Yet, the prevalence of diastolic dysfunction and its relation to systolic dysfunction and CHF in the community remain undefined.
  
  
  OBJECTIVE
  To determine the prevalence of CHF and preclinical diastolic dysfunction and systolic dysfunction in the community and determine if diastolic dysfunction is predictive of all-cause mortality.
  
  
  METHODS
  Cross-sectional survey of 2042 randomly selected residents of Olmsted County, Minnesota, aged 45 years or older from June 1997 through September 2000.
  
  
  METHODS
  Doppler echocardiographic assessment of systolic and diastolic function. Presence of CHF diagnosis by review of medical records with designation as validated CHF if Framingham criteria are satisfied. Subjects without a CHF diagnosis but with diastolic or systolic dysfunction were considered as having either preclinical diastolic or preclinical systolic dysfunction.
  
  
  RESULTS
  The prevalence of validated CHF was 2.2% (95% confidence interval [CI], 1.6%-2.8%) with 44% having an EF higher than 50%. Overall, 20.8% (95% CI, 19.0%-22.7%) of the population had mild diastolic dysfunction, 6.6% (95% CI, 5.5%-7.8%) had moderate diastolic dysfunction, and 0.7% (95% CI, 0.3%-1.1%) had severe diastolic dysfunction with 5.6% (95% CI, 4.5%-6.7%) of the population having moderate or severe diastolic dysfunction with normal EF. The prevalence of any systolic dysfunction (EF < or =50%) was 6.0% (95% CI, 5.0%-7.1%) with moderate or severe systolic dysfunction (EF < or =40%) being present in 2.0% (95% CI, 1.4%-2.5%). CHF was much more common among those with systolic or diastolic dysfunction than in those with normal ventricular function. However, even among those with moderate or severe diastolic or systolic dysfunction, less than half had recognized CHF. In multivariate analysis, controlling for age, sex, and EF, mild diastolic dysfunction (hazard ratio, 8.31 [95% CI, 3.00-23.1], P<.001) and moderate or severe diastolic dysfunction (hazard ratio, 10.17 [95% CI, 3.28-31.0], P<.001) were predictive of all-cause mortality.
  
  
  CONCLUSIONS
  In the community, systolic dysfunction is frequently present in individuals without recognized CHF. Furthermore, diastolic dysfunction as rigorously defined by comprehensive Doppler techniques is common, often not accompanied by recognized CHF, and associated with marked increases in all-cause mortality.
authors.affiliation: Division of Cardiovascular Diseases, Department of Internal Medicine, Guggenheim 9, Mayo Clinic and Foundation, 200 First St SW, Rochester, MN 55905, USA. redfield.margaret@mayo.edu
authors.forename: Margaret M
authors.initials: MM
authors.lastname: Redfield
authors.forename: Steven J
authors.initials: SJ
authors.lastname: Jacobsen
authors.forename: John C
authors.initials: JC
authors.lastname: Burnett
authors.forename: Douglas W
authors.initials: DW
authors.lastname: Mahoney
authors.forename: Kent R
authors.initials: KR
authors.lastname: Bailey
authors.forename: Richard J
authors.initials: RJ
authors.lastname: Rodeheffer
mesh_terms: D000368:Aged; D002423:Cause of Death; D003430:Cross-Sectional Studies; D003971:Diastole; D015150:Echocardiography, Doppler; D006333:Heart Failure / Q000175:diagnosis / Q000453:epidemiology* / Q000503:physiopathology; D006801:Humans; D008875:Middle Aged; D015995:Prevalence; D016016:Proportional Hazards Models; D016019:Survival Analysis; D013599:Systole; D018754:Ventricular Dysfunction / Q000000981:diagnostic imaging / Q000453:epidemiology* / Q000503:physiopathology