Systems and methods treat a tissue region. In one arrangement, the systems and methods deploy an electrode on a support structure in a tissue region at or near the cardia of the stomach. The support structure has a proximal region and a distal region. The proximal region is enlarged in comparison to...http://www.google.com/patents/US6464697?utm_source=gb-gplus-sharePatent US6464697 - Stomach and adjoining tissue regions in the esophagus
