Atrial Fibrillation Screening With MobiCARE in Subjects With Health Care Examination

Inclusion Criteria: 1. Subjects aged 65 years or older who have at least one stroke risk factor\* 2. Subjects aged 19 years to \<65 years who have two or more stroke risk factors. 3. Subjects aged 75 years or older * Stroke risk factors: heart failure, hypertension, diabetes, vascular disease, women, stroke/systemic embolism/transient ischemic attack (although stroke/systemic embolism/transient ischemic attack among stroke risk factors is considered to have two risk factors) * Heart failure: a history of heart failure diagnosis or a history of current heart failure treatment. * Hypertension, Diabetes: Diagnostic History * Vascular diseases: Significant coronal atherosclerosis (when 70% or more of the computed tomography or coronary angiography is present or coronary intervention is performed), 50% or more of the carotid artery disease, peripheral vascular disease, history of myocardial infarction, and aortic plaques Exclusion Criteria: 1. Subjects diagnosed with atrial fibrillation in the past 2. Subjects aged under 19 years and other vulnerable research subjects 3. Subjects who have patch-type adhesive allergies/atopy dermatitis/ urticaria/skin rash/hives that are difficult to apply patches continuously 4. Subjects who have a structural abnormality in the thorax and is difficult to attach the device. 5. Subjects who have cardiac implantable electronic device (pacemaker, implantable cardioverter-defibrillator, implantable loop recorder, or cardiac resynchronized therapy-pacemaker or defibrillator) 6. Subjects requiring immediate ECG analysis or ECG monitoring through hospitalization due to arrhythmia that can be life-threatening 7. Subjects who are deemed inappropriate to participate in the research as judged by the researcher for other reasons.