Strategies to Improve the Outcome of Cryoballoon Ablation in the Treatment of Atrial Fibrillation

Figure 1

The changes among the four-generation cryoballoons. The CBG1 displayed an equatorial cooling band (shaded area) (a). Better cryoablation effect was realized due to the hemispherical cooling surface in CBG2 to CBG4 compared to CBG1 (b–d). A shortened tip contributed to better achievement of PV signals in CBG3 and CBG4 (c and d). However, the CBG4 had a larger distal tip diameter but the maximum outer diameter is the same with the previous cryoballoons (d).

(a)

(b)

(c)

(d)