Versatility of a Circular Multielectrode Catheter in the Individualized Recognition & Treatment of Atrial Fibrillation and Related Arrhythmias Using Pulsed Field Energy

Inclusion Criteria: * Age 18 or older. * Diagnosed with atrial fibrillation or atrial atypical atrial flutter (typical flutter may also be ablated provided that the typical flutter occurs in addition to atrial fibrillation or atypical flutter; that is, typical flutter as the sole arrhythmia should not undergo PFA). * Previous surgical or catheter ablation for atrial fibrillation is allowed * Planned for a catheter ablation procedure * Able and willing to provide written consent and comply with all testing and follow-up requirements * Have in place or are planned to receive an implantable loop recorder, pacemaker or defibrillator capable of recording atrial rhythm Exclusion Criteria: * Documented "active" left atrial thrombus * Conditions that preclude the introduction and manipulation of intracardiac catheters: eg, active intracardiac thrombus, myxoma, tumor, a prohibitive interatrial baffle or patch, etc.) * Previous PCI/MI within the past 1 month * Active systemic infection or sepsis * Uncontrolled heart failure - New York Heart Association (NYHA) function class IV. * History of blood clotting, bleeding abnormalities or contraindication to anticoagulation. * Significant congenital anomaly or medical problem that in the opinion of the investigator would preclude enrollment. * Women who are pregnant, lactating, or who are of childbearing age and plan on becoming pregnant during this trial. * Life expectancy or other disease processes likely to limit survival to less than 1…