Left atrial voltage characteristics in patients with persistent atrial fibrillation

Aim. The aim of the study was to assess the impact of comorbidities and duration of arrhythmic anamnesis on the results of left atrium voltage mapping in patients with persistent atrial fibrillation (AF). Methods. The study enrolled 50 patients who underwent the first radiofrequency ablation of persistent AF. Left atrium endocardial voltage maps were obtained using a 3D electroanatomical mapping system during AF. The voltage maps consisted of at least 2,000 points, with an average of 2,128±104 points. Low-voltage areas (LVA) were defined as <0.5 mV. The percentage of LVA% and very LVA% were calculated. Results. We found a statistically significant correlation of LVA% with age (p<0.001, r=0.720), female sex (p=0.016), and the duration of arrhythmic history at the time of the start of persistence (p<0.001, r=0.503). Based on the data obtained, an original scale was developed to predict LVA%. The scale includes age, female sex, and the duration of arrhythAim. The aim of the study was to assess the impact of comorbidities and duration of arrhythmic anamnesis on the results of left atrium voltage mapping in patients with persistent atrial fibrillation (AF). Methods. The study enrolled 50 patients who underwent the first radiofrequency ablation of persistent AF. Left atrium endocardial voltage maps were obtained using a 3D electroanatomical mapping system during AF. The voltage maps consisted of at least 2,000 points, with an average of 2,128±104 points. Low-voltage areas (LVA) were defined as <0.5 mV. The percentage of LVA% and very LVA% were calculated. Results. We found a statistically significant correlation of LVA% with age (p<0.001, r=0.720), female sex (p=0.016), and the duration of arrhythmic history at the time of the start of persistence (p<0.001, r=0.503). Based on the data obtained, an original scale was developed to predict LVA%. The scale includes age, female sex, and the duration of arrhyth