This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as doi: 10.1111/pace.13975. This article is protected by copyright. All rights reserved. Cryoballoon or Radiofrequency Ablation? Alternating Technique For Repeat Procedures in Patients with Atrial Fibrillation Short Title: Alternating Technique During Repeat PVI Ablation Roberto Verlato 1 ,MD, Paolo Pieragnoli 2 , MD, Saverio Iacopino 3 , MD, Werner Rauhe 4 , MD, Giulio Molon 5 , MD, Giuseppe Stabile 6 , MD, Luca Rebellato 7 , MD, Giuseppe Allocca 8 , MD, Giuseppe Arena 9 , MD, Giovanni Rovaris 10 , MD, Riccardo Sacchi 11 , MD, Domenico Catanzariti 12 , MD, Patrizia Pepi 13 , MD, Claudio Tondo 14 PhD. 1. AULSS 6 Euganea, Ospedale di Cittadella-Camposampiero, Padova 2. Ospedale Careggi, University of Florence 3. Maria Cecilia Hospital, GVM Care&Research, Cotignola, Ravenna 4. San Maurizio Regional Hospital, Bolzano 5. IRCCS Sacro Cuore don Calabria, Negrar 6. a. Casa di Cura Montevergine Mercogliano (AV), b. Clinica San Michele, Maddaloni (CE) 7. Azienda Sanitaria Universitaria Integrata di Udine, Udine 8. Santa Maria dei Battuti, Presidio Ospedaliero, Conegliano 9. Ospedale delle Apuane, Massa 10. ASST San Gerardo di Monza 11. Azienda Ospedaliera di Desio e Vimercate, Vimercate 12. Santa Maria del Carmine, Rovereto 13. Ospedale C. Poma, Mantova 14. Cardiac Arrhythmia Research Centre, Centro Cardiologico Monzino IRCCS Milan