Bipolar active fixation lead for sensing and pacing the heart
First Claim
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1. An implantable lead for use with an implantable medical device, comprising:
- a lead body having a proximal end and a distal end, said lead body including at least two electrical conductors extending from said proximal end to said distal end of said lead body;
an electrical connector coupled to said proximal end of said lead body and including at least two terminals electrically connected to respective ones of said at least two conductors; and
an electrode assembly comprising an active fixation helix coupled to said distal end of said lead body, said active fixation helix comprising;
a pair of electrodes separated by an intermediate insulator; and
means for electrically interconnecting each of said pair of electrodes to a respective one of said at least two electrical conductors of said lead body.
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Abstract
An implantable bipolar pacing lead having a bipolar active fixation electrode for use with a cardiac pacemaker. The bipolar active fixation electrode may include a pair of coaxial electrodes, separated by an intermediate insulator, formed into the shape of a helix. The bipolar electrode helix is preferably advanceable from a distal end of the bipolar pacing lead.
237 Citations
27 Claims
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1. An implantable lead for use with an implantable medical device, comprising:
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a lead body having a proximal end and a distal end, said lead body including at least two electrical conductors extending from said proximal end to said distal end of said lead body; an electrical connector coupled to said proximal end of said lead body and including at least two terminals electrically connected to respective ones of said at least two conductors; and an electrode assembly comprising an active fixation helix coupled to said distal end of said lead body, said active fixation helix comprising; a pair of electrodes separated by an intermediate insulator; and means for electrically interconnecting each of said pair of electrodes to a respective one of said at least two electrical conductors of said lead body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An implantable lead for use with an implantable medical device, the implantable lead comprising:
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at least two electrical conductors each having a proximal end and a distal end; an insulation sheath covering said at least two electrical conductors; an electrical connector affixed to said proximal end of each of said at least two electrical conductors and to said insulation sheath; and a bipolar active fixation electrode assembly affixed to said distal end of each of said at least two electrical conductors and to said insulation sheath, said bipolar active fixation electrode assembly having a distal end and a proximal end, said bipolar active fixation electrode assembly comprising a helix, said helix having a distal end and a proximal end, said helix comprising; a cathode electrode; and an anode electrode, said cathode and anode electrodes being electrically spaced from one another by a distance of between 0.1 and 5.0 millimeters by an intermediate insulator. - View Dependent Claims (12, 13, 14)
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15. An implantable lead for use with an implantable medical device, the implantable lead comprising:
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at least two electrical conductors encased in an insulation sheath, said electrical conductors and said insulation sheath extending from a proximal end to a distal end of said implantable lead; a connector, affixed to said proximal end of said implantable lead, comprising at least two terminals electrically connected to respective ones of said at least two electrical conductors; a cylindrical sheath attached to said distal end of said implantable lead; a sleeve electrode affixed to said cylindrical sheath and adapted to make electrical contact with cardiac tissue; an active fixation electrode assembly comprising a single means for penetrating the myocardium of a heart, said penetrating means having a distal end and a proximal end, said penetrating means comprising a tip electrode formed at said distal end thereof;
an outer electrode coaxial with said tip electrode; and
an intermediate insulator separating said outer electrode and said tip electrode, said active fixation electrode assembly positioned at said distal end of said implantable lead and electrically insulated from said sleeve electrode; andmeans for electrically interconnecting said tip electrode of said active fixation electrode assembly and said sleeve electrode to respective ones of said at least two electrical conductors of said implantable lead. - View Dependent Claims (16, 17, 18, 19, 20)
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- 21. An electrode assembly comprising an active fixation helix having a pair of electrodes electrically separated by an intermediate insulator.
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27. An electrode assembly comprising an active fixation helix having a pair of electrodes, each one of said pair of electrodes being disposed along a portion of the coil of the helix, the pair of electrodes being electrically separated by an intermediate insulator.
Specification