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| Predictive value of P wave dispersion in early and late recurrences of paroxysmal atrial fibrillation after radiofrequency ablation |
| CHEN Lina, LI Meijuan |
| (1. Department of Electrocardiogram, Xiamen Hospital of Traditional Chinese Medicine, Xiamen Fujian 361009; 2. Department of Cardiology, Zhongshan Hospital Affiliated to Xiamen University, Xiamen Fujian 361004, China) |
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Abstract Objective To study the relationship between P wave dispersion (Pd) and early or late recurrence of paroxysmal atrial fibrillation (AF) after radiofrequency ablation, and to explore its predictive value on the recurrence. Methods We selected 181 patients with paroxysmal AF who had received radiofrequency ablation of AF. All the postoperative patients were followed up for an average of (93±29) months, and the recurrence time was recorded. Twelve lead electrocardiogram examination was performed at sinus rhythm separately before operation, and 1 month, 3 months and 6 months after operation. P wave duration was measured and Pd was calculated. The relativity between Pd and early or late recurrence of AF after radiofrequency ablation was analyzed. Results Early recurrence is defined as the onset of AF or atrial flutter≤3 months after radiofrequency ablation; late recurrence is defined as the onset of AF or atrial flutter
more than 3 months after ablation. The early recurrence rate of paroxysmal AF after ablation is 11.6% (21/181) while the late recurrence rate is 17.7% (32/181). The difference of Pd is statistically significant between the early recurrence group and the nonearlyrecurrence group separately before ablation and one month after operation (P<0.05). There is a significant difference in Pd between the late recurrence group and the nonlaterecurrence group 6 months after operation (P<0.05). Multivariate Logistic regression results show that Pd before ablation and 1 month after ablation is an independent risk factor for early recurrence after ablation of AF while Pd 6 months after ablation is an independent risk factor for late recurrence after AF ablation. Conclusion Pd could provide references for predicting the early and late recurrences of AF.
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