Vektor Mapping System for Atrial Fibrillation

Inclusion Criteria: 1. Subjects diagnosed with persistent (not longstanding) AF or recurrent AF, as defined for this study. 2. Subject has a recent 12-lead electrogram data of AF (including baseline, pacing and clinical arrhythmia) recorded on the electrogram recording system (e.g., Bard, Boston-Scientific, St. Paul, MN or Prucka, GE Medical) or standalone ECG system (e.g., GE Muse, Minnesota, or CardioCard (Nasiff, NY) in digitized format. 3. The following data elements can be abstracted from the patient medical records or confirmed and documented prior to the scheduled procedure (to be inputted in vMap®): * Atrial fibrillation type * Atrial characteristics: geometry (normal, left and/or right atrial enlargement), Utah classification, prior ablation modality (e.g., radiofrequency, cryoablation, pulsed field ablation), prior ablation lesion location(s). 4. Subject is ≥ 22 years of age at time of enrollment/consent. 5. Subject is indicated to undergo an ablation procedure at the medical discretion of the Investigator. 6. Subject is able and willing to comply with the protocol requirements, has been informed of the nature of the study, Exclusion Criteria: 1. Subjects with arrhythmias other than persistent or recurring AF as defined for this study, including long-standing persistent atrial fibrillation (persistent AF lasting ≥ 1 year from diagnosis). 2. Inability to obtain ECG prior to or during the clinical ablation procedure; or unacceptable ECG data quality such as low ECG signal-to-noise ratio or lack of ECG data in one or more leads. 3. Subjects who are participating in another clinical investigation with an investigational drug or device at the time of enrollment or planned participation at any time during this clinical investigation. 4. Subjects who have a known or suspected medical condition that, in the opinion of the Investigator, may put the subject at risk for participation in this clinical investigation. 5. Subjects who are pregnant as confirmed by the institution's standard pre-surgery practice. 6. Subject has had prior PVI and all four pulmonary veins are confirmed to be isolated based on voltage readings during the study index procedure.