• ≥ 18 years of age, or older if required by local law

• Single previous AF ablation procedure for Paroxysmal Atrial Fibrillation (PAF) or Persistent AF (PersAF)that minimally included pulmonary vein isolation that occurred within 5 years prior to enrollment.

• Documented (physician's note) diagnosis of PersAF either prior to the subject's Index Procedure OR development of PersAF after the Index Procedure.

• Documented evidence of AF recurrence at least 60 days after the subject's Index Procedure, captured by any regulatory cleared rhythm monitoring device.

⁃ OR

• If diagnosed with PersAF prior to the Index Procedure, documented recurrence of AF or atypical AFL at least 60 days after the Index Procedure, captured by any regulatory cleared rhythm monitoring device.

• Willing and capable of providing informed consent

• Willing and capable of participating in all follow-up assessments and testing associated with this clinical investigation at an approved clinical investigational center