title: [The etiology and associated risk factors in a sample of 300 patients with atrial fibrillation].
abstract: OBJECTIVE
  To analyze the etiology and the prevalence of risk factors in patients with atrial fibrillation.
  
  
  METHODS
  Applying an unpaired case controlled study, we examined 300 consecutive patients (143 men) with atrial fibrillation and a mean age of 66 +/- 8 years. This group is compared with a control group of 700 patients (mean age 64 +/- 12 years).
  
  
  RESULTS
  In the group with atrial fibrillation the etiology in 32% was arterial hypertension, in 20% coronary heart disease, in 13% valvular heart disease, in 11% heart failure, in 4% hyperthyroidism and in 20% idiopathic. 50% presented hypertension, 29% tobaccoism, 26% left ventricular hypertrophy, 20% consumption of alcohol, 19% hypercholesterolemia and 16% diabetes. Compared with the control group, patients with atrial fibrillation had coronary heart disease (p < 0.05), VHD (p < 0.01), myocardiopathy (p < 0.05), HT (p < 0.001), left ventricular hypertrophy (p < 0.001), diabetes (p < 0.01) and alcohol consumption (p < 0.01) more frequently. In the multivariant analysis heart failure (odds ratio 2.1 [1.2-3.3]), the valvular heart disease (odds ratio 2.2 [1.4-3.5]), the coronary heart disease (odds ratio 1.8 [1.2-2.6]), the arterial hypertension (odds ratio 1.7 [1.2-2.3]), the left ventricular hypertrophy (odds ratio 2.6 [1.7-3.8]), the diabetes (odds ratio 1.9 [1.2-2.9]) and alcoholic habits (odds ratio 2 [1.3-3.9]) were independent risk factors for atrial fibrillation in our population.
  
  
  CONCLUSIONS
  Atrial fibrillation in our study, is more frequent in patients with arterial hypertension, coronary heart disease or valvular heart disease. There are other risk factors such as arterial hypertension, diabetes and consumption of alcohol too, the modification of which could diminish the risk of the appearance of atrial fibrillation.
authors.affiliation: Servicio de Cardiología, Hospital Central de Asturias, Oviedo.
authors.forename: V
authors.initials: V
authors.lastname: Barriales Alvarez
authors.forename: C
authors.initials: C
authors.lastname: Morís de la Tassa
authors.forename: I
authors.initials: I
authors.lastname: Sánchez Posada
authors.forename: R
authors.initials: R
authors.lastname: Barriales Villa
authors.forename: J
authors.initials: J
authors.lastname: Rubin López
authors.forename: J M
authors.initials: JM
authors.lastname: de la Hera Galarza
authors.forename: J
authors.initials: J
authors.lastname: Vara Manso
authors.forename: S
authors.initials: S
authors.lastname: Hevia Nava
authors.forename: A
authors.initials: A
authors.lastname: Cortina Llosa
mesh_terms: D000368:Aged; D001281:Atrial Fibrillation / Q000453:epidemiology / Q000209:etiology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012307:Risk Factors
vernacular_title: Estudio de la etiología y factores de riesgo asociados en una muestra de 300 pacientes con fibrilación auricular.