These different epidemiologic studies confirm
the difficulty to predict the risk of stroke and the
complexity of the mechanisms. The prevalence
depended on several risk factors, but appeared
slightly lower than in this study. The prevalence
of ischemic stroke or TIA was higher than the
prevalence reported in general population, but
the incidence was not different. This last fact
contrasted with the reported data on the high risk
of AF in patients with SVT