A bi-directional electrode catheter comprising an elongated tubular catheter body, a catheter tip section at the distal end of the catheter body and a control handle at the proximal end of the catheter. The tip section comprises two pair of generally diametrically opposed off-axis lumens. Two pair of...http://www.google.es/patents/US6198974?utm_source=gb-gplus-sharePatente US6198974 - Bi-directional steerable catheter
