Catheter guidance by magnetocardiographic mapping
First Claim
1. A cardiac electrocatheter comprising a plurality of distal electrodes (2, 3, 4, 5), constructed of a non-ferromagnetic and non-polarizable conductor material, shaped in such a manner as to generate simultaneously or sequentially electromagnetic fields of dipolar configuration and with different geometry, at least a more proximal electrode (6;
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6bis;
6tris), such electrodes being located at the end of multiple wires (7, 8, 9, 10, 11, 12, 13), of a non-ferromagnetic conductive material, which wires are electrically insulated and twisted one with respect to the other, to avoid, except for the electrodes, magnetic field generation along the catheter during the induction of electromagnetic dipoles at the distal end of the catheter, and a substantially cylindrical flexible tube (1) that sheaths said wires and electrodes, at the distal end thereof leaving exposed a section of the electrode tips and, onto the side wall, near the distal end, a section of said at least one ring-shaped more proximal electrode.
1 Assignment
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Accused Products
Abstract
The catheter is constructred of a substantially cylindrical tube, longitudinally subdivided in multiple parallel lumens for wires, available to introduce drives having a distal end with a variable curving, and of fiberoptics for the delivery of energy as laser emission, or different ablation devices. The amagnetic distal electrodes permit the high-resolution mapping of multiple monophasic action potentials just at the arrthythmogenic foci themselves, the magneto cardiographic localization of the catheter and the possible modification of the electrophysiological substrate with the delivery of energy as laser emission. The catheter can be intracardiacally manipulated in the patient with a very high accuracy by exploiting the variability of the curving of the distal end and the sliding thereof into preformed external sheaths, for fitting at the best the threedimensional coordinates thereof with those of the arrhythmogenic substrate, non-invasively predetermined by magnetocardiographic imaging.
73 Citations
25 Claims
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1. A cardiac electrocatheter comprising a plurality of distal electrodes (2, 3, 4, 5), constructed of a non-ferromagnetic and non-polarizable conductor material, shaped in such a manner as to generate simultaneously or sequentially electromagnetic fields of dipolar configuration and with different geometry, at least a more proximal electrode (6;
-
6bis;
6tris), such electrodes being located at the end of multiple wires (7, 8, 9, 10, 11, 12, 13), of a non-ferromagnetic conductive material, which wires are electrically insulated and twisted one with respect to the other, to avoid, except for the electrodes, magnetic field generation along the catheter during the induction of electromagnetic dipoles at the distal end of the catheter, and a substantially cylindrical flexible tube (1) that sheaths said wires and electrodes, at the distal end thereof leaving exposed a section of the electrode tips and, onto the side wall, near the distal end, a section of said at least one ring-shaped more proximal electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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6bis;
Specification