Agilis RF TSP Early Feasibility Study

Inclusion Criteria: * Is able and willing to provide written informed consent prior to any clinical investigation-related procedure * Plans to undergo an ablation procedure in LA, LV or concomitant procedure with ablation and LAAO device implantation requiring transseptal puncture * Is at least 18 years of age * Able and willing to comply with all study requirements Exclusion Criteria: * Currently participating in another clinical trial or has participated in a clinical trial within 30 days prior to screening that may interfere with this clinical trial without pre-approval from the study Sponsor * Pregnant or nursing * Known presence of intracardiac thrombus * Known existing circumferential pericardial effusion (\>2 mm) * Previous interatrial septal patch or prosthetic atrial septal defect closure device * Any previous thromboembolic event with in the last 6 months * Known or suspected left atrial myxoma * Known or suspected myocardial infarction within the last two weeks * Unstable angina * Recent (within the last 3 months) cerebral vascular accident (CVA) * Patients with an active infection * Patients who do not tolerate anticoagulation therapy * Presence of other anatomic or comorbid conditions, or other medical, social, or psychological conditions that, in the investigator's opinion, could limit the subject's ability to participate in the clinical investigation or to comply with follow-up requirements, or impact the scientific soundness of the clinical investigation results