Key result
Left atrium diameter did not significantly affect the success rate of radiofrequency ablation for atrial fibrillation, with 86% of patients with diameter ≤60 mm and 73% with ≥60 mm returning to sinus rhythm.
Why the study?
Does radiofrequency ablation during mitral valve surgery improve return to sinus rhythm in patients with chronic atrial fibrillation regardless of left atrium diameter?
Cohort (n=124)
No
Does radiofrequency ablation during mitral valve surgery improve return to sinus rhythm in patients with chronic atrial fibrillation regardless of left atrium diameter?
Absolute Event Rate: 86% vs 73%
p-value: p=NS
Radiofrequency ablation during mitral valve surgery is highly effective at restoring sinus rhythm in patients with chronic atrial fibrillation, even in those with severely enlarged left atria (≥60 mm).
Ablation success during mitral surgery appears independent of left atrial diameter; hypothesis-generating and requires prospective validation.
Background: In this study, we aimed to determine the effect of atrium diameter on the successful treatment of atrial fibrillation through the radiofrequency ablation technique. Methods: Between January 2003 and December 2010, 124 patients with chronic atrial fibrillation who were scheduled for mitral valve surgery due to mitral valve disease in our heart and vascular surgery clinic were retrospectively analyzed. The patients were examined in two main groups which were divided into four subgroups. While dividing them, the type of ablation technique and the left atrium diameter were taken into consideration. The preoperative, intraoperative, and postoperative data of the patients were assessed. Results: In our study, it was determined that very successful results were achieved for both patient groups in the evaluations based on the left atrium diameter of those subjects who underwent both unipolar ablation and bipolar ablation. In addition, return to sinus rhythm in patients with a left atrium diameter of 60 mm. Comparable results were also obtained with the patients who underwent bipolar ablation. In the patient follow-up, it was observed that the postoperative rhythm of each patient group were stable. Conclusion: Regardless of the diameter of the left atrium, the results of radiofrequency ablation surgeries with the radical technological developments today are satisfactory.
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Serdar Bayrak (2012) conducted a cohort in Chronic atrial fibrillation (n=124). Radiofrequency ablation (LA diameter ≤60 mm) vs. Radiofrequency ablation (LA diameter ≥60 mm) was evaluated on Return to normal sinus rhythm after unipolar radiofrequency ablation (p=NS). Left atrium diameter did not significantly affect the success rate of radiofrequency ablation for atrial fibrillation, with 86% of patients with diameter ≤60 mm and 73% with ≥60 mm returning to sinus rhythm.
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