CRYOBALLOON ABLATION IN RUSSIAN SITES OF INTERVENTIONAL ATRIAL FIBRILLATION MANAGEMENT TREATMENT: RESULTS OF THE FIRST NATIONWIDE SURVEY oleh E. N. Mikhailov, D. S. Lebedev, E. A. Pokushalov, K. V. Davtyan, E. A. Ivanitsky, A. A. Nechepurenko, A. Ya. Kosonogov, G. V. Kolunin, I. A. Morozov, S. A. Termosesov, E. B. Maykov, D. N. Khomutinin, S. A. Eremin, I. M. Mayorov, A. B. Romanov, V. V. Shabanov, V. S. Shatachtsyan, V. Yu. Tsivkovsky, A. V. Patsyuk, A. Sh. Revishvili, E. V. Shlyakhto