Cryoballoon pulmonary vein isolation as first-line treatment of typical atrial flutter: long-term outcomes of the CRAFT trial 由 Calvert, P, Ding, WY, Das, M, Tovmassian, L, Tayebjee, MH, Haywood, G, Martin, CA, Rajappan, K, Bates, MGD, Temple, IP, Reichlin, T, Chen, Z, Balasubramaniam, RN, Sticherling, C, Ronayne, C, Clarkson, N, Morgan, M, Barton, J, Kemp, I, Mahida, S, Gupta, D