A catheter, used e.g. for cardiac ablation, has a handle, a shaft, and a J-bendable distal end containing tip and ring electrodes. The tip electrode is axially rotatable and has insulated and uninsulated portions. As the tip electrode is rotated, the impedance between it and a reference level is observed....http://www.google.fr/patents/US5643255?utm_source=gb-gplus-shareBrevet US5643255 - Steerable catheter with rotatable tip electrode and method of use
Steerable catheter with rotatable tip electrode and method of use
