The role of high-density mapping in atrial fibrillation ablation
https://doi.org/10.35336/VA-2021-1-33-37
Abstract
Aims. To determine the role of the prevalence of low-voltage areas in the occurrence of arrhythmia recurrence after interventional treatment of atrial fibrillation (AF).
Methods. The study included 38 patients with paroxysmal (52.6%) and persistent (47.4%) forms of AF who underwent interventional treatment of AF using high-density electroanatomical mapping (at least 10,000 EGM points). Analysis of electroanatomical maps was performed after the completion of the ablation procedure. The area of the low-voltage zones was measured manually. Then, the areas of all regions of low-voltage activity were summed up; the resulting value was expressed as a percentage of the total surface area of the left atrium (LA).
Results. The observation period was 12.8±3.2 months. Based on the results of endocardial mapping, all patients were divided into 2 groups according to the prevalence of low-voltage areas in the LA. The first group included patients with an area of low-voltage zones less than 5% of the total surface of the left atrium, and the second with an area of low-voltage areas of more than 5% of the total surface of the left atrium. The patients of the first group had a lower LA volume compared to patients from the second group, with mean values of 119.87±16.35 ml and 154.57±33.23 ml, respectively (p=0.007). In the first group, AF recurrence was recorded in one patient after catheter treatment, in the second group in 5 patients.
Conclusion. Common areas of low-voltage activity in the left atrium, detected by high-density mapping before the procedure for catheter treatment of AF, are a predictor of arrhythmia recurrence after interventional treatment.
About the Authors
E. V. Dedukh
FSBI “Vishnevsky NMRC of surgery”, Russian Federation
Russian Federation
Russian Federation
Moscow
E. A. Artyukhina
FSBI “Vishnevsky NMRC of surgery”, Russian Federation
Russian Federation
Russian Federation
Moscow
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Review
For citations:
Dedukh E.V., Artyukhina E.A. The role of high-density mapping in atrial fibrillation ablation. Journal of Arrhythmology. 2021;28(1):33-37. (In Russ.) https://doi.org/10.35336/VA-2021-1-33-37
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