Assessment of structural changes in the left atrium myocardium according to cardiac magnetic resonance with contrast before and after balloon cryoablation in patients with persistent atrial fibrillation

Aim. To study the structural changes of left atrium myocardium according to magnetic resonance imaging with contrast in patients persistent atrial fibrillation before and after balloon cryoablation compare results effectiveness intervention. Material methods research. The included 28 form fibrillation. All underwent cardiac delayed using a high-resolution MR pulse sequence (voxel size 1,25x1,25x1,25 mm) cryoablation. severity fibrous lesion was calculated automatically specialized LGE HEART Analyzer program algorithms based on myocardial index threshold value 1.38. clinical efficacy intervention evaluated 12 months relationship determined data Results. fibrotic 1,5 [0,16; 9,3]%. In Utah patients, stage 1 fibrosis detected 71,4% (n=20), 2 14,3% (n=4), 3 3,6% (n=1), 4 10,7% (n=3). cryoablation, there an increase 2,7 [1,02; 18,8]% (p<0,001). Overall efficiency rate 57,1%. construction Kaplan- Meyer curves demonstrated that most effective minimal ablation (Utah I) least more pronounced (stage III IV) Conclusion. Magnetic heart allows assess atrial, which may be one factors interventional treatment AF.