A Prospective,Randomized Comparison of Modified Pulmonary Vein Isolation Versus Conventional Pulmonary Vein Isolation in Patients with Paroxysmal Atrial Fibrillation |
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Authors: | YENN‐JIANG LIN MD SHIH‐LIN CHANG MD LI‐WEI LO MD YU‐FENG HU MD KAZUYOSHI SUENARI MD CHENG‐HUNG LI MD TZE‐FAN CHAO MD FA‐PO CHUNG MD JO‐NAN LIAO MD BENY HARTONO MD HAN‐WEN TSO PhD HSUAN‐MING TSAO MD JIN‐LONG HUANG MD TSAIR KAO PhD SHIH‐ANN CHEN MD |
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Institution: | 1. Division of Cardiology, Taipei Veterans General Hospital, Taipei, Taiwan;2. School of Medicine, Institute of Clinical Medicine, and Cardiovascular Research Institute, National Yang‐Ming University, Taipei, Taiwan;3. Institute of Biomedical Engineering;4. Division of Cardiology, National Yang‐Ming University, I‐Lan, Taiwan;5. Cardiovascular Center, Taichung Veterans General Hospital, Taichung, Taiwan;6. Department of Biomedical Engineering, Hungkuang University, Taichung, Taiwan |
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Abstract: | Modified Pulmonary Vein Isolation in AF Ablation. Introduction: Pulmonary vein isolation (PVI) is the primary ablation therapy in patients with atrial fibrillation (AF). We hypothesized that high dominant frequency (DF) sites (AF nests during sinus rhythm SR]) adjacent to the PV ostia are associated with the atrial substrate that maintains AF, and PVI incorporating the high‐frequency AF nests may have a higher efficacy. Methods and Results: In a prospective and randomized comparison, 126 symptomatic paroxysmal AF patients that underwent PVI were enrolled. We compared the efficacy of a modified PVI (ablation line: 1.0–1.5 cm from the PV ostium with encircling the AF nests spectral analysis with DF >70 Hz during SR, Group II]) versus the anatomy‐guided conventional PVI (Group I). In Group II, the DF value along the PV ostium was lower than 70 Hz after the PVI. The primary endpoint was the freedom from symptomatic atrial arrhythmias after a single procedure. We also followed the autonomic function by a time‐domain analysis of the heart rate variability. In both groups, AF nests were observed and electric isolation was successfully obtained in all patients. With a mean duration of 16 ± 6.1 months of follow‐up, Group II had a higher single procedure efficacy without drugs (78.7% vs 66.1%, log‐rank test: P = 0.02), and fewer repeat procedures (6.6% vs 23%; P = 0.04), as compared to Group I. Conclusion: PVI incorporating the high frequency AF nests adjacent to the PV ostia had a better single procedure efficacy. (J Cardiovasc Electrophysiol, Vol. 23, pp. 1155–1162, November 2012) |
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Keywords: | atrial fibrillation autonomic nervous system catheter ablation frequency analysis pulmonary vein isolation |
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