PREDICTORS OF ATRIAL FIBRILLATION RECURRENCE AFTER RADIOFREQUENCY ABLATION IN PATIENTS WITH CHRONIC HEART FAILURE.
OBJECTIVE
The aim: To study the predictive power of demographic, hemodynamic and electrocardiographic factors for atrial fibrillation recurrence after radiofrequency ablation (RFA) in patients with chronic heart failure.


PATIENTS AND METHODS
Materials and methods: Study included 120 patients, aged 59,80±10,08 years old with chronic heart failure with preserved left ventricular ejection fraction who were undergo RFA due to atrial fibrillation (AF). A standard 12-lead electrocardiogram (ECG) was registered. Before the procedure the standard echocardiographic parameters were obtained. After 12 months, patients were divided into 2 groups: non-recurrence group and recurrence group.


RESULTS
Results: As a result of prospective follow-up within 12 months AF recurrences were observed in 32 patients (27%), 88 patients remained non-recurrent (73%). The left atrium (LA) diameter and aortic root diameter were lager in the recurrence group (4,59±0,45 vs. 4,08±0,61 cm, p<0,001; 3,37±0,60 vs. 2,80±0,67 cm, p<0,001). The AF recurrence group before RFA had a significantly longer QTc interval than the non-recurrence group (387,23±2,31 vs. 341,22±8,91 ms, p<0,010). ROC curve analysis revealed LA diameter the most sensitive factor for AF recurrence after RFA.


CONCLUSION
Conclusions: QTc duration before radiofrequency ablation and its prolongation after intervention are independent predictors of atrial fibrillation recurrence; left atrium diameter before ablation is a highly sensitive predictor in patients with chronic heart failure with preserved left ventricular ejection fraction.
['Zolotarova|Tetiana V|TV|', 'Brynza|Mariia S|MS|', 'Volkov|Dmytro Y|DY|', 'Shevchuk|Maryna I|MI|', 'Bilchenko|Oleksandr V|OV|']
D001281:Atrial Fibrillation D017115:Catheter Ablation D002648:Child D006325:Heart Atria D006333:Heart Failure D006801:Humans D011446:Prospective Studies D000078703:Radiofrequency Ablation D012008:Recurrence D013318:Stroke Volume D016896:Treatment Outcome D016277:Ventricular Function, Left
atrial fibrillation recurrence radiofrequency ablation heart failure