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EP0428812A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Intracardiac catheter, magneto-cardiographically localizable, for mapping and pacing provided with means for ablation of arrythmogenic tissue

Assignee: Consiglio Nazionale delle Richerche
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Filing: 1989-07-25
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Granted: —
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Expires: 2009-07-25
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Abstract

Abstract A catheter (1) for intracardiac mapping, pacing biopsy and ablation of arrythmogenic tissue, comprises at its tip two non-polarizable, non-ferromagnetic electrodes (2, 3), arranged in such a way that an electromagnetic field of dipolar configuration can be generated in the heart by connecting them to an external current generator. The connection is done with twisted pairs of non-ferromagnetic conductors (4, 5) to avoid any other magnetic field along the catheter during cardiac pacing. With this assembly the tip of the catheter can be localized (and driven close to an arrhythmogenic target) by using the magnetocardiographic mapping method for three-dimensional localization and imaging. The catheter can be made of different kinds of non-thrombogenic, flexible, insulated, sterilizable material, with multiple parallel lumens (6..8; 9, 10) to allow fluid infusion, suction and/or introduction of ablation or biopsy devices.

Inventors

  • 👤 Riccardo Fenici

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-23 14:58
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/24; A61B5/25; A61B5/279; A61B5/28; A61B5/283; A61B5/287; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/05; A61N1/056; A61N1/0565

Claims Analysis

Total Claims: 11
Claim 1
Independent Claim 90 words
A multipurpose cardiac electrocatheter, which comprises at least two non-ferromagnetic non-polarizable electrodes shaped in such a way as to generate an electric field of dipolar configuration, the two electrodes being connected to the external pacing devices through a pair of copper insulated wires, twisted all along the catheter length up to the electrodes, in order to guarantee absence of magnetic field along the catheter during pacing, and the catheter itself being a flexible cylindrical tube of plastic material fully electrically insulated except where the distal and proximal electrodes are placed.
Claim 2
Dependent Claim 90 words
A multipurpose cardiac electrocatheter, which comprises at least two non-ferromagnetic non-polarizable electrodes shaped in such a way as to generate an electric field of dipolar configuration, the two electrodes being connected to the external pacing devices through a pair of copper insulated wires, twisted all along the catheter length up to the electrodes, in order to guarantee absence of magnetic field along the catheter during pacing, and the catheter itself being a flexible cylindrical tube of plastic material fully electrically insulated except where the distal and proximal electrodes are placed.
Claim 3
Dependent Claim 39 words
The cardiac electrocatheter as per claim 1, which is provided, besides the lumen for the electrode wires, with other multiple parallel lumens, with terminal and/or lateral eyelets, to insert ablation wires or fiberoptics, to apply suction and/or fluid infusion.
Claim 4
Dependent Claim 23 words
The cardiac electrocatheter as per claims 1 and 2, in which the distal electrode is hemispherically shaped and the proximal electrode is ring-shaped.
Claim 5
Dependent Claim 19 words
The cardiac electrocatheter as per claim 1 and 2, in which both the distal and proximal electrodes are ring-shaped.
Claim 6
Dependent Claim 22 words
The cardiac electrocatheter as per the preceding claims, in which the equivalent surface of the electrodes ranges between 5 and 15 mm².
Claim 7
Dependent Claim 19 words
The cardiac electrocatheter as per the preceding claims, in which the interelectrode distance ranges between 2 and 7 mm.
Claim 8
Dependent Claim 26 words
The cardiac electrocatheter as per the preceding claims in which the material of the electrodes is selected from the group comprising platinated platinum and amorphous carbon.
Claim 9
Dependent Claim 29 words
The cardiac electrocatheter as per the preceding claims, in which the wires connected to the electrodes are made in pure copper, the wires being about 200 µm in diameter.
Claim 10
Dependent Claim 25 words
The cardiac electrocatheter as per the previous claims, in which the catheter tube material is selected from the group comprising polyurethan, polyethylen­terephtalate, polyethylene or polyvinylchloride.
Claim 11
Dependent Claim 23 words
The cardiac electrocatheter as per the previous claims, in which the catheter's size ranges between 1.67 and 2.60 mm (5 and 8 F).

References Cited (Backward Citations)

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