Straight and curved catheters for treatment or diagnoses of tissue, including cardiac tissue, using hydrogel virtual electrodes and hydrogel sensing electrodes are disclosed. Each catheter comprises at least one conductive hydrogel electrode, whether a virtual electrode or a sensing electrode. Hydrogel...http://www.google.de/patents/US8012152?utm_source=gb-gplus-sharePatent US8012152 - Treatment and diagnostic catheters with hydrogel electrodes
