Method and apparatus for guiding ablative therapy of...

Details Method and apparatus for guiding ablative therapy of... Method and apparatus for guiding ablative therapy of...

G - Physics

01

V

G01V 3/02 (2006.01) A61B 5/042 (2006.01) A61B 5/06 (2006.01) A61N 1/06 (2006.01)

Patent

CA 2353901

(57) This invention involves method and apparatus for guiding ablative therapy or abnormal biological electrical excita- tion. In particular, it is designed for treatment of cardiac arrhythmias. In the method of this invention electrical signals are acquired from passive electrodes (1), and an inverse dipole method is used to identify the site of origin of as arrhythmia (8). The location of the tip of the ablation catheter (9) is similarly localized from signals acquired from the passive electrodes while electrical energy is delivered to the tip of the catheter. The catheter tip is then guided to the side of origin of the arrhythmia, and ablative radio frequency energie is delivered to its tip to ablate the site.

La présente invention concerne un procédé et un appareil de guidage destinés à la thérapie d'ablation d'une excitation bioélectrique anormale. Ledit appareil est conçu, en particulier, pour le traitement des arythmies cardiaques. Selon le procédé de l'invention, des électrodes passives (1) collectent des signaux électriques et on utilise un procédé de dipôle inverse pour identifier le site d'origine d'une arythmie (8). L'emplacement de la pointe du cathéter (9) d'ablation est localisé de manière similaire, à partir des signaux acquis par les électrodes passives, pendant que l'énergie électrique est fournie à la pointe du cathéter. La pointe du cathéter est ensuite guidée vers le site d'origine de l'arythmie, et l'on applique une énergie d'ablation du type radiofréquence au niveau de ladite pointe, de manière à procéder à l'ablation du site.

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