Aim. The results presented, of subanalysis of the catheter ablation (CA) registry in atrial fibrillation (AF) with the patients properties, specifics of CA and treatment results, in Russia comparing to European countries. Material and methods. During 2012 to 2015, totally 3742 patients included to the registry, of those 477 in Russia. In 467 Russian patients (males 56,5%; mean age 58,5 y. o.) CA AF was done. During one year 392 patients were followed up. Minimum requirements to follow-up: routine ECG registration and non less than one contact after 12 months passed. Results. In Russian patients there were more common obesity (46,1% and 29,2%, pu003c0,001), hypertension heart disease (40,2% and 22,8%, pu003c0,0001), coronary heart disease (31,7% and 16,2%, pu003c0,0001), chronic heart failure (67,3% and 13,0%, pu003c0,0001). In Russia the patients more commonly underwent primary CA (83,5% in Russia and 77,6% in European countries, pu003c0,05), more rare in Russia the cryoballoon ablation was done (3% and 18%, pu003c0,05). Generally adverse events were reported more rare in Russia (10,5% and 16,6%, p=0,0007), including cardiovascular adverse events (2,6% and 5,2%, pu003c0,05). Tachiarrhythmias recurs were diagnosed more rare in Russia, including by the subsutaneous ECG monitors (17% and 1,6% in other countries, рu003c0,001). Within the year of follow-up, full absence of tachiarrhythmias recurs in Russia was found in 65,8% of patients, in other countries — in 74,7% (р=0,0003). Conclusion. In real clinical setting, high efficacy of CA AF was shown, resistant to antiarrhythmic therapy. In most of Russian patients there were cardiovascular comorbidities. There was lower rate of reported adverse events in Russian centers of interventional treatments.

Aim. Current registry is the continued national study on cryoablation in atrial fibrillation (AF). The aim of the project is assessment of safety and efficacy of cryoballoon ablation of pulmonary veins from AF treatment in real clinical practice prospective observation. Material and methods. The project has been developed for prospective inclusion of the data to guarded automatic informational system, on clinical data of patients, ablation parameters, repeat ablation and results of 12-month follow-up. To participate in the project in January of 2017, the representatives of 33 in-patient facilities were invited, that routinely perform the procedure. Results. Twenty five institutions confirmed their participation, and by December of 2017, the database was completed by specialists from 13 clinics: information on the ablation procedure and outcomes is included for 451 patient. The enrollment is ongoing with estimated end by January 2019; prospective follow-up to be completed by January 2020. Conclusion. Prospective registry of AF cryoablation is important for gathering of experience and common analysis of the procedures throughout the country. Detailed analysis will make it to reveal predictors of efficacy and methods for procedural risk decrease.