AI Article Synopsis
- The study examined the effectiveness of segmental ostial catheter ablation (SOCA) in treating paroxysmal atrial fibrillation (PAF) by focusing on the electrical connections between the left atrium and pulmonary veins.
- In a trial with 108 patients, two groups were compared: one using a 4 mm tip catheter with lower radiofrequency power (30 W) and another with a larger 8 mm tip catheter at higher power (40 W), which also received additional targeted radiofrequency treatments.
- Results showed that the higher power and larger catheter group had lower recurrence rates of PAF and better outcomes after multiple procedures, suggesting enhanced effectiveness of SOCA when using optimized techniques.
Article Abstract
The aim of this study was to investigate whether segmental ostial catheter ablation (SOCA) designed to prevent the electrical connections (ECs) between the left atrium and pulmonary veins (PVs) might help increase the efficacy of SOCA in paroxysmal atrial fibrillation (PAF). PV mapping and successful SOCA were performed with a basket catheter in 108 consecutive patients with PAF. Radiofrequency energy was delivered using a maximum output of 30 W with a 4 mm tip catheter (group I; 47) or 40 W with an 8 mm tip catheter (group II; 61). Only in the group II patients were additional radiofrequency deliveries to the specific sites where the ECs tended to recover performed after successful SOCA. After the first procedure, PAF recurred in 47% of the group I patients and 32% of the group II patients. In all 27 patients who underwent repeat procedures, EC recoveries were observed more frequently in group I than in group II (69% versus 49%; P < 0.05). After multiple procedures, there was more freedom from PAF in group II (84%) than in group I (66%) (P < 0.05). SOCA with a higher RF power, larger tip catheter, and additional RF deliveries could achieve a more effective SOCA.
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| http://dx.doi.org/10.1536/ihj.47.219 | DOI Listing |
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