[Prevalence and incidence of electrocardiographic abnormalities in healthy population older than 49].

Purpose: To determine the prevalence and incidence of electrocardiographic abnormalities (EKG-abn).
Material and Methods: Design. 2 stage study: 1st: descriptive cross-sectional, 2nd: prospective cohort.
Location: 28 urban primary health centers in Barcelona city area.
Participants: The study population was composed by patients who had participated in the population based ARTPER multicentric study. This study has two phases where each patient had one EKG, physical examination and blood test to obtain the secondary variables. The available EKG from both phases were reviewed, achieving a total of 2,727 patients with EKG. 601 (22%) individuals with CV disease were excluded. A total of 2.126 patients were studied of whom 392 (18%) had 2 EKG, one at each phase. Mean measurements. The association between the presence of EKG-abn and explanatory variables was performed using multivariate logistic regression, obtaining odds ratios (OR) and their 95% confidence intervals (95%CI).
Results: 58% women and average age 66years. 32% (95%CI: 30%-34%) (n=671) presented EKG-abn of whom 60% (n=402) were minor and 40% (n=269) major disorders. The most common EKG-abn were the conduction disturbances. EKG-abn were associated with males (OR: 1.7; 95%CI: 1.4-2.1) and patients older than 65 (OR: 1.6; 95%CI: 1.4-2.0). Among the 345 people without EKG-abn at baseline and with 2 available EKG, 71 showed an EKG-abn at the second EKG (incidence in 4.7years of 21% (95%CI: 16%-25%).
Conclusion: EKG abnormalities are common in healthy general population. EKG-abn are more common in male and elderly patients.
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