The principal linvestigator decided not to continue the registry. No patient were enrolled. CLosure to the registry was done October 2014

The purpose of this research is to monitor how well patients do after surgery for treatment of left atrial appendage (LAA).

Patients will be followed in an observational study. We propose to do a single follow-up TEE at 3 to 6 months (this is standard of care) to confirm LAA (left atrial appendage) occlusion. The TEE is not mandatory (this is not a clinical trial), but will be strongly recommended to patients to confirm the efficacy of treatment. This will help confirm whether patients may safely remain off anticoagulation. The risks of TEE are a less than 1 in 1000 risk of death, and a 1% or less risk of a major complication, such as esophageal perforation.

Inclusion Criteria:

• Patients with Atrial fibrillation
• Are poor candidates to take warfarin
• Have elected to undergo a LARIAT procedure

Exclusion Criteria:

• none

Patients being asked to take part in this study have a heart disorder known as atrial fibrillation (AF) and are poor candidates to take blood thinning drug known as warfarin (Coumadin), and have elected to undergo LARIAT procedure.