title: Outcomes of Cryoballoon Ablation in High- and Low-Volume Atrial Fibrillation Ablation Centres: A Russian Pilot Survey.
abstract: OBJECTIVE
  The results of cryoballoon ablation (CBA) procedure have been mainly derived from studies conducted in experienced atrial fibrillation (AF) ablation centres. Here, we report on CBA efficacy and complications resulting from real practice of this procedure at both high- and low-volume centres.
  
  
  METHODS
  Among 62 Russian centres performing AF ablation, 15 (24%) used CBA technology for pulmonary vein isolation. The centres were asked to provide a detailed description of all CBA procedures performed and complications, if encountered.
  
  
  RESULTS
  Thirteen sites completed interviews on all CBAs in their centres (>95% of CBAs in Russia). Six sites were high-volume AF ablation (>100 AF cases/year) centres, and 7 were low-volume AF ablation. There was no statistical difference in arrhythmia-free rates between high- and low-volume centres (64.6 versus 60.8% at 6 months). Major complications developed in 1.5% of patients and were equally distributed between high- and low-volume centres. Minor procedure-related events were encountered in 8% of patients and were more prevalent in high-volume centres. Total event and vascular access site event rates were higher in women than in men.
  
  
  CONCLUSIONS
  CBA has an acceptable efficacy profile in real practice. In less experienced AF ablation centres, the major complication rate is equal to that in high-volume centres.
authors.affiliation: Arrhythmia Department, Federal Almazov North-West Medical Research Centre, Saint Petersburg 197341, Russia ; Neuromodulation Unit, Federal Almazov North-West Medical Research Centre, Saint Petersburg 197341, Russia.
authors.forename: Evgeny N
authors.initials: EN
authors.lastname: Mikhaylov
authors.affiliation: Arrhythmia Department, Federal Almazov North-West Medical Research Centre, Saint Petersburg 197341, Russia.
authors.forename: Dmitry S
authors.initials: DS
authors.lastname: Lebedev
authors.affiliation: Center of Interventional Cardiology, State Research Institute of Circulation Pathology, Novosibirsk 630055, Russia.
authors.forename: Evgeny A
authors.initials: EA
authors.lastname: Pokushalov
authors.affiliation: National Research Center for Preventive Medicine, Moscow 101990, Russia.
authors.forename: Karapet V
authors.initials: KV
authors.lastname: Davtyan
authors.affiliation: Federal Center for Cardiovascular Surgery, Krasnoyarsk 660020, Russia.
authors.forename: Eduard A
authors.initials: EA
authors.lastname: Ivanitskii
authors.affiliation: Federal Center for Cardiovascular Surgery, Astrakhan 414011, Russia.
authors.forename: Anatoly A
authors.initials: AA
authors.lastname: Nechepurenko
authors.affiliation: Electrophysiology Department, City Hospital #5, Nizhny Novgorod 603005, Russia.
authors.forename: Alexey Ya
authors.initials: AY
authors.lastname: Kosonogov
authors.affiliation: Electrophysiology Department, Tyumen Cardiology Center, Tyumen 625026, Russia.
authors.forename: Grigory V
authors.initials: GV
authors.lastname: Kolunin
authors.affiliation: Electrophysiology Department, Research Institute of Cardiology, Saratov 410028, Russia.
authors.forename: Igor A
authors.initials: IA
authors.lastname: Morozov
authors.affiliation: Cardiovascular Surgery Department, City Hospital #12, Moscow 115516, Russia.
authors.forename: Sergey A
authors.initials: SA
authors.lastname: Termosesov
authors.affiliation: Department of Clinical Electrophysiology, Russian Cardiology Research and Production Center, Moscow 121552, Russia.
authors.forename: Evgeny B
authors.initials: EB
authors.lastname: Maykov
authors.affiliation: Tyumen Regional Hospital #1, Tyumen 625032, Russia.
authors.forename: Dmitry N
authors.initials: DN
authors.lastname: Khomutinin
authors.affiliation: Republican Clinical Hospital of the Republic of Tatarstan, Kazan 420064, Russia.
authors.forename: Sergey A
authors.initials: SA
authors.lastname: Eremin
authors.affiliation: Botkin City Hospital, Moscow 125284, Russia.
authors.forename: Igor M
authors.initials: IM
authors.lastname: Mayorov
authors.affiliation: Center of Interventional Cardiology, State Research Institute of Circulation Pathology, Novosibirsk 630055, Russia.
authors.forename: Alexander B
authors.initials: AB
authors.lastname: Romanov
authors.affiliation: Center of Interventional Cardiology, State Research Institute of Circulation Pathology, Novosibirsk 630055, Russia.
authors.forename: Vitaliy V
authors.initials: VV
authors.lastname: Shabanov
authors.affiliation: National Research Center for Preventive Medicine, Moscow 101990, Russia.
authors.forename: Victoria
authors.initials: V
authors.lastname: Shatakhtsyan
authors.affiliation: Federal Center for Cardiovascular Surgery, Krasnoyarsk 660020, Russia.
authors.forename: Viktor
authors.initials: V
authors.lastname: Tsivkovskii
authors.affiliation: Bakulev Scientific Center of Cardiovascular Surgery, Moscow 121552, Russia.
authors.forename: Amiran Sh
authors.initials: ASh
authors.lastname: Revishvili
authors.affiliation: Institute of Heart and Vessels, Federal Almazov North-West Medical Research Centre, Saint Petersburg 197341, Russia.
authors.forename: Evgeny V
authors.initials: EV
authors.lastname: Shlyakhto
mesh_terms: D001281:Atrial Fibrillation / Q000628:therapy*; D002300:Cardiac Care Facilities / Q000706:statistics & numerical data*; D017115:Catheter Ablation / Q000009:adverse effects* / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010865:Pilot Projects; D011183:Postoperative Complications; D012426:Russia