Impedance controlled RF transseptal perforation

The invention relates to an impedance controlled RF transseptal perforation. An exemplary RF ablation system including a transseptal needle having an ablation electrode thereon may be used to perform transseptal perforation using RF energy. Ablation energy may be applied and/or terminated based on a change in impedance at the ablation electrode when the electrode is in or out of contact with tissue. The transseptal needle may also include a magnetic field sensor and one or more electrodes. A magnetic field sensor may be positioned proximate a distal end of the transseptal needle and may be configured to provide positional information of the distal end. 本发明题为"阻抗控制的RF经中隔穿孔"。包括在其上具有消融电极的经中隔针的示例性RF消融系统可用于使用RF能量来执行经中隔穿孔。当电极与组织接触或脱离接触时，可以基于消融电极处的阻抗变化来施加和/或终止消融能量。经中隔针还可包括磁场传感器和一个或多个电极。磁场传感器可定位在经中隔针的远侧端部附近并且可被配置成提供远侧端部的位置信息。