mHealth Screening to Prevent Strokes

Participants: The study population will be derived from the Aetna and Medicare populations. Inclusion Criteria: * Male or females age \> 75 or * Male age \> 55, or females age \> 65, and * Prior CVA, or * Heart failure, or * Diagnosis of both diabetes and hypertension, or * Mitral valve disease, or * Left ventricular hypertrophy, or * COPD requiring home O2, or * Sleep apnea, or * History of pulmonary embolism, or * History of myocardial infarction, or * Diagnosis of obesity Exclusion Criteria: * Current or prior diagnosis of atrial fibrillation, atrial flutter or atrial tachycardia * Receiving chronic anticoagulation therapy * Hospice care * End stage renal disease * Diagnosis of moderate or greater dementia * Implantable pacemaker and/or defibrillator * History of skin allergies to adhesive patches * Known metastatic cancer * Aetna Compassionate Care Program (ACCP) participants - individuals with advanced illness and limited life expectancy