Heart device study in india aims to track AF progression

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1 Subject is implanted with a Medtronic cardiac implantable device with an atrial lead equipped with atrial ATP therapies (rATP) enabled no longer than 18 months and at the minimum 6 weeks has passed since the implant; 2. Age \> 55 years; 3. Subject provides informed consent; 4. Subject is willing and able to comply with the study procedures; 5. Subject has documented history of atrial fibrillation or atrial flutter, or one or more of the risk factors for developing AF as per AHA/HRS (American heart Association/Heart rhythm Society) guidelines. * Age \> 60 years; * Stroke/TIA (Transient ischemic Attack); * Diabetes; * High Blood Pressure; * Coronary artery disease; * Cardiomyopathy; * Pericardial inflammation; * Prior heart attacks; * Congestive heart failure; * Structural heart disease (valve problems or congenital defects); * Prior open-heart surgery; * Untreated atrial flutter (another type of abnormal heart rhythm); * Thyroid disease; * Chronic lung disease; * Sleep apnea; * Excessive alcohol use; * Serious illness or infection. Exclusion criteria: Patients are not eligible to be enrolled in the study if any of the following criteria is met: 1. Subject has been implanted with a Medtronic cardiac implantable device with an atrial lead equipped with atrial ATP therapies (rATP) enabled for more than 18 months; 2. Subject is in permanent AF or persistent AF at the baseline visit: 1. The definition of permanent AF will be based on the physicians' decision that nothing further can be done to cardiovert the patient or, in historical cases, the investigators will refer to the Cardiac Compass reports: 2. The definition of persistent AF at baseline will refer to the Cardiac Compass reports (\>7 consecutive days in AF with the last day being the day of enrollment) 3. Participation in other studies which could potentially conflict with this study; 4. Legal incapacity or evidence that a subject cannot understand the purpose and risks of the study or inability to comply fully with study procedures and follow up.