Pulmonary vein (PV) isolation using cryoballoon (CB) catheter is generally characterized by a high radiation and contrast media exposure. A new dielectric imaging system (KODEX–EPD imaging system) allows pulmonary vein (PV) occlusion assessment without dye use. The purpose of this study was to verify the feasibility of reducing the radiation and dye use during CB ablation in patients with atrial fibrillation (AF) using the new dielectric imaging system. In a retrospective, single center study, we enrolled 34 consecutive patients with paroxysmal AF divided in two groups: 17 patients in Conventional Group underwent the procedure under fluoroscopy guidance before the new system introduction, while 17 patient in KODEX–EPD Group underwent the procedure under fluoroscopy and KODEX–EPD imaging system guidance. There were no differences in any clinical and anatomical characteristics between the two study groups. Overall procedure time was comparable between the two groups (69 [IQR 63–98] min in Conventional Group vs. 65 [IQR 58–74] min in KODEX–EPD Group, p = 0.16), while fluoroscopy time (8 [IQR 5–9] min vs. 11 [IQR 9–12] min, p = 0.014) and dye use (35 [IQR 28–45] ml vs. 70 [IQR 57–83] ml, p < 0.001) were significantly lower in the KODEX–EPD Group. No 30-day complications were observed. At 12-month follow-up 7/37 (19%) patients had an atrial arrhythmias recurrence, without any difference between the two study groups (17.6% vs. 23.5%, p = 0.68). The use of a new dielectric imaging system allowed a significantly reduction in radiation exposure and dye use during CB ablation in patients with AF.

使用冷冻球 (CB) 导管进行肺静脉 (PV) 隔离的一般特点是高辐射和造影剂暴露。一种新的介电成像系统（KODEX-EPD 成像系统）允许在不使用染料的情况下进行肺静脉 (PV) 闭塞评估。本研究的目的是验证使用新的介电成像系统在房颤 (AF) 患者 CB 消融期间减少辐射和染料使用的可行性。在一项回顾性单中心研究中，我们连续招募了 34 名阵发性AF 分为两组：常规组 17 例患者在新系统引入前在透视引导下进行手术，而 KODEX-EPD 组 17 例患者在透视和 KODEX-EPD 成像系统引导下进行手术。两个研究组之间的任何临床和解剖学特征均无差异。两组的总体手术时间相当（常规组为 69 [IQR 63-98] 分钟，而 KODEX-EPD 组为 65 [IQR 58-74] 分钟，p  = 0.16），而透视时间（8 [IQR 5-9] min vs. 11 [IQR 9-12] min，p  = 0.014）和染料使用（35 [IQR 28-45] ml vs. 70 [IQR 57 –83] ml, p  < 0.001) 在 KODEX-EPD 组中显着降低。未观察到 30 天并发症。在 12 个月的随访中，7/37 (19%) 的患者出现房性心律失常复发，两个研究组之间没有任何差异（17.6% 对 23.5%，p  = 0.68）。使用新的介电成像系统可以显着减少 AF 患者 CB 消融期间的辐射暴露和染料使用。