Unable to obtain equipment from Sponsor to be able to proceed with the study.

The purpose of this study is to determine whether a wristband that detects your pulse can detect your heart rate and rhythm similar to electrocardiograms (ECG).

The purpose of this study is to determine whether a wristband that detects your pulse can detect your heart rate and rhythm similar to electrocardiograms (ECG). These wristbands detect your pulse based on a technique called "photoplethysmography," (PPG). PPG is a common method in which an individual's pulse is detected based on a light signature interpreted by the wristband. Most commercially available heart rate monitors use PPG to determine your heart rate, but the accuracy is variable.

Inclusion Criteria:

1. Male or female 18 years of age or older with a primary diagnosis of atrial fibrillation
2. Willing and able to provide informed consent and follow the study protocol
3. Clinically indicated planned restoration of normal rhythm

Exclusion Criteria:

1. Unable to provide informed consent
2. Unable to follow the study protocol
3. Women who are pregnant
4. Subjects with implantable devices (only if participating in phase 2-BodyGuardian processes/testing)