射频导管消融术中影响病灶形成的因素。

Bakken Research Center Maastricht, The Netherlands.

Indian Pacing Electrophysiol J. 2003 Jul 1;3(3):117-28.

In radiofrequency (RF) ablation, the heating of cardiac tissue is mainly resistive. RF current heats cardiac tissue and in turn the catheter electrode is being heated. Consequently, the catheter tip temperature is always lower--or ideally equal--than the superficial tissue temperature. The lesion size is influenced by many parameters such as delivered RF power, electrode length, electrode orientation, blood flow and tissue contact. This review describes the influence of these different parameters on lesion formation and provides recommendations for different catheter types on selectable parameters such as target temperatures, power limits and RF durations.

在射频（RF）消融中，心脏组织的加热主要是电阻性的。射频电流加热心脏组织，进而使导管电极被加热。因此，导管尖端温度总是低于——或者理想情况下等于——浅表组织温度。病变大小受许多参数影响，如施加的射频功率、电极长度、电极方向、血流和组织接触。本综述描述了这些不同参数对病变形成的影响，并针对不同类型的导管在目标温度、功率限制和射频持续时间等可选参数方面提供了建议。