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Medical AI Inquiry: You was designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.  Labels: OBJECTIVES, BACKGROUND, METHODS, RESULTS. Meshes: Adult, Aged, Atrial Fibrillation, Catheter Ablation, Cohort Studies, Electrocardiography, Electrodes, Female, Follow-Up Studies, Heart Atria, Humans, Male, Middle Aged, Probability, Retrospective Studies, Severity of Illness Index, Tachycardia, Paroxysmal, Treatment Outcome.
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The linear ablation of atrial fibrillation in the right atrium: can the isthmus ablation improve its efficacy? Context: The aims of this study were to compare the efficacy of a 2- versus a 3 RF lesions ablation procedure in the RA in patients with paroxysmal AF, and to map right atrial activation during AF. RF catheter-mediated ablation lines mimicking the Maze operation have been proposed as a novel curative approach for AF. The relationship between this type of ablation and right atrial mapping has not been extensively studied. Twenty-four patients with recurrent, drug-refractory, paroxysmal AF underwent an extensive mapping of the RA before attempting linear lesion RF ablation. Patients were divided into two groups: 15 patients received two linear lesions (Group 1), 9 patients three linear lesions (Group 2). One-month success rate AF did not recur in 40% of Group 1 patients (6/15) and in 66% (6/9) of Group 2 patients. 27% of patients in Group 1 and 11% of patients in Group 2 had recurrences controlled by drugs. No benefit in 33% of Group 1 patients and 22% of Group 2. Long-term follow-up In the absence of any drug treatment, no AF recurrences were observed in 26% of Group 1 patients (FU: 23 to 47 months) and 55% of Group 2 (FU: 14 to 23 months). No complications were reported.
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Right atrial linear ablation is safe and may be proposed for AF treatment in selected patients.