Diaphragmatic Evaluation by Fluoroscopy to Identify Phrenic Nerve Dysfunction Related to Electroporation

Inclusion Criteria: * Diagnosis of paroxysmal or persistent atrial fibrillation (AF), documented by any method: ECG, Holter, invasive monitoring (implantable device memory), or non-invasive monitoring (connected devices). * Ablation indication decided as part of routine care, according to society guidelines. * First ablation procedure (including pulmonary vein isolation) planned using a commercially available PFA catheter. * Ability to perform diaphragmatic fluoroscopic evaluation before and after the procedure (before hospital discharge). Exclusion Criteria: * Patients presenting with one or more of the following conditions will be excluded from the study: * Known history of diaphragmatic paralysis (right-sided or bilateral) or preexisting clinical suspicion. * History of atrial fibrillation ablation. * History of neuromuscular disease. * History of major thoracic surgery or chronic pulmonary pathology likely to impair diaphragmatic motion. * Diaphragmatic paralysis diagnosed during the pre-procedure fluoroscopic assessment. * Inability to perform post-procedure fluoroscopic control (due to logistical limitations, patient refusal, or contraindication to radiation exposure). * Current pregnancy or breastfeeding. * Concurrent participation in another interventional study that may interfere with the objectives of the present research. * Significant cognitive impairment or inability to understand the study objectives or provide valid consent.