This study's objective is to determine if electrical stimulation can safely reduced atrial fibrillation, which is an abnormal heart rhythm that begins in the top chambers of the heart. Electrical stimulation will be delivered to the wrists or in the ear. Participation will last about 6 weeks and require 3 clinic visits. Participants will be asked to wear a heart monitor and patch to monitor the heart rate and rhythm, keep a diary to collect information on atrial fibrillation, undergo randomization (being randomly assigned, like drawing straws) and use the study device per randomization assignment. Participants are randomized in a 1:1:1 fashion to a wrist worn study device, an ear piece study device or a sham wrist worn study device. A sham device looks like the real wrist worn device but does not deliver any electrical stimulation.

This research is being done to assess whether it is safe and effective to stop oral anticoagulation medications (a blood-thinning medication) during prolonged periods of normal heart rhythm in participants with infrequent episodes of atrial fibrillation (AF).

You may qualify for this study if you have a history of atrial fibrillation (AF) and are currently taking an oral anticoagulant (a blood-thinning medication). You will be randomized to one of two groups: Control Group or Study Intervention Group.

If you are randomized to the Control group, you will be asked to stay on your previously prescribed oral anticoagulant. If you are randomized to the Study Intervention group, you will be asked to take the oral anticoagulant for 30 days only if a prolonged episode of AF is detected on an AF-sensing Apple smartwatch you will be provided.

This study is enrolling subjects who are undergoing an atrial fibrillation ablation. Atrial fibrillation (AF) is a condition where the heart beats rapidly and irregularly. An ablation procedure can destroy the tissue in the heart that transmits the irregular electrical signals that cause the AF. The ablation procedure will use the FARAPULSE™ Pulsed Field Ablation System which is approved by the Food and Drug Administration (FDA) and uses pulsed field energy (a specific type of electrical energy) to destroy the heart tissue.

This study will last about 3 years and include up to 10 visits, some of which can be done remotely. Study procedures include blood work, electrocardiogram (ECG) which is a tracing of the heart's electrical activity, and collection of medical history and images.

This study is enrolling subjects who are undergoing an atrial fibrillation ablation. Atrial fibrillation (AF) is a condition where the heart beats rapidly and irregularly. An ablation procedure can destroy the tissue in the heart that transmits the irregular electrical signals that cause the AF. The ablation procedure will use the PulseSelect™ PFA System which is approved by the Food and Drug Administration (FDA) and uses electroporation (electrical pulses) to destroy the heart tissue.

This study will last about 2 years and include up to 6 visits, some of which can be done virtually. Study procedures include data collection, questionnaires, electrocardiogram (ECG) - which is a tracing of the heart's electrical activity, echocardiogram (Echo) - which is an ultrasound test of the heart, and a Holter monitor - which is a wearable device that continuously records heart rhythm.

Atrial fibrillation (AF) is an arrhythmia in which the heartbeat becomes irregular due to abnormal electrical signals in the upper chambers of the heart, called the atria. This leads to ineffective pumping of blood by the atria. Complications related to atrial fibrillation are heart failure, stroke, heart palpitations and fatigue. This study is motivated by the need to address the increasing prevalence of AF, which is the most common sustained arrhythmia worldwide. While treatment options for AF include the use of antiarrhythmic drugs which are a group of medications used to treat irregular heartbeats, and catheter ablation procedures, the latter have been associated with significantly better outcomes. Participation in this study consists of 2 phases, 1- randomization 2- ablation procedure and follow-up period.
The randomization to the different groups is considered the research part of the study. Subjects will have equal chance of being randomized (like tossing a coin) to one of two AF ablation treatment groups. All follow up will be according to stand of care practices. Risks include stroke, pericarditis, acute and delayed perforation, hemolysis, acute kidney injury, and coronary artery spasm.