Department of Cardiology, Thoraxcenter, ErasmusMC, Gravendijkwal 230, CA-3000 Rotterdam, The Netherlands.
Europace. 2010 Nov;12(11):1522-5. doi: 10.1093/europace/euq294. Epub 2010 Aug 18.
Ablation for atrioventricular nodal reentry tachycardia is very effective, with a potential for damage to the normal conduction system. Cryoablation is an alternative, as it allows cryomapping, which permits assessment of slow pathway elimination at innocent freezing temperatures, avoiding permanent damage to the normal conduction system. It is associated with shorter radiation times and the absence of heart block in all published data. We discuss in this overview different approaches of cryoenergy delivery (focusing on spot catheter ablation), and how lesion formation is influenced by catheter tip size, application duration, and freezing rate. Some advantages of cryoenergy are explained. Whether these features also apply for an approach with a cryoballoon, e.g. for atrial fibrillation is unclear.
房室结折返性心动过速的消融非常有效，但可能会损伤正常的传导系统。冷冻消融是一种替代方法，因为它允许进行冷冻标测，可以在无害的冷冻温度下评估慢径的消除情况，避免对正常传导系统造成永久性损伤。所有已发表的数据均显示，冷冻消融与较短的辐射时间和无心脏阻滞相关。本文综述了不同的冷冻能量传递方法（重点介绍点状导管消融），以及导管尖端大小、应用时间和冷冻速率如何影响病变形成。解释了冷冻能量的一些优势。对于冷冻球囊消融等方法，这些特点是否也适用，例如用于心房颤动，目前尚不清楚。
