Transvenous internal cardiac defibrillation apparatus having lead and electrode providing even distribution of electrical charge
First Claim
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1. An apparatus for ventricular cardioverting or defibrillation of a heart comprising:
- an implantable pulse generator;
a lead having a proximal end and a distal end;
a connector assembly attached to the proximal end of said lead, said connector assembly allowing connection of said lead to said pulse generator;
an electrode assembly located at the distal end of said lead, said electrode assembly including a defibrillation electrode positioned proximally from the distal end of said lead;
a defibrillation conductor extending from said connector assembly at the proximal end of said lead to the defibrillation electrode at the distal end of said lead; and
means for evenly distributing electrical charge emitted by said defibrillation electrode comprising at least one insulator dividing said defibrillation electrode into at least two electrically interconnected segments, each segment having an axial length, and wherein the respective axial lengths of said electrically interconnected segments decreases from a proximal end of said defibrillation electrode to a distal end of said defibrillation electrode.
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Abstract
A lead for use with an implanted pulse generator which may be a pacemaker or defibrillator or combination thereof. The lead can deliver an electrical charge to cardiovert or defibrillate the ventricles of the heart via a large surface area defibrillation electrode which is passively implanted in the ventricle. The defibrillation electrode is designed to produce a uniform defibrillation charge distribution.
68 Citations
22 Claims
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1. An apparatus for ventricular cardioverting or defibrillation of a heart comprising:
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an implantable pulse generator; a lead having a proximal end and a distal end; a connector assembly attached to the proximal end of said lead, said connector assembly allowing connection of said lead to said pulse generator; an electrode assembly located at the distal end of said lead, said electrode assembly including a defibrillation electrode positioned proximally from the distal end of said lead; a defibrillation conductor extending from said connector assembly at the proximal end of said lead to the defibrillation electrode at the distal end of said lead; and means for evenly distributing electrical charge emitted by said defibrillation electrode comprising at least one insulator dividing said defibrillation electrode into at least two electrically interconnected segments, each segment having an axial length, and wherein the respective axial lengths of said electrically interconnected segments decreases from a proximal end of said defibrillation electrode to a distal end of said defibrillation electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A lead adapted for connection to an implantable pulse generator, said lead comprising:
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a lead body having a proximal end and a distal end; a connector assembly attached to the proximal end of said lead body; a defibrillation electrode positioned near the distal end of said lead body, said defibrillation electrode configured to be passively implanted in the ventricle of a heart; a defibrillation conductor extending through said lead body from said connector assembly at the proximal end to said defibrillation electrode at the distal end of said lead body; and means for evenly distributing electrical charge emitted by said defibrillation electrode, comprising at least one insulator covering an external portion of said defibrillation electrode to divide said defibrillation electrode into at least two electrically interconnected segments, each segment having an axial length, and the respective axial lengths of said at least two electrically interconnected segments decreasing from a proximal end of said defibrillation electrode to a distal end of said defibrillation electrode. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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Specification