All people included were managed by the Public Health System. Therefore 5,000 participants aged 65-75 with active diagnoses of hypertension (I10) and diabetes (E10.9 E11.9) will be selected from the electronic health record of Primary Care. Given that the registered prevalence of Atrial Fibrillation was 7.3%, the investigators estimated that around 2.8% will be newly diagnosed with AF at the first study visit. Therefore, the investigators estimate that the number of patients in this population who have undiagnosed AF might be from 140 to 210 patients, taking into account that AF detection should be improved in the study given the long-term monitoring.