Methods for delivering precise amounts of fluid into cardiac tissue for the purpose of facilitating ablation of the tissue along a desired lesion line. One method injects fluid through a hollow needle. The injected fluid can be a highly conductive fluid injected in conjunction with radiofrequency ablation...http://www.google.de/patents/US7294143?utm_source=gb-gplus-sharePatent US7294143 - Device and method for ablation of cardiac tissue
