Electrode spacing in a subcutaneous implantable cardiac stimulus device
First Claim
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1. An implantable defibrillator system for subcutaneous placement comprising:
- an implantable canister housing operational circuitry for sensing electrical cardiac activity and delivering electrical stimulus to correct arrhythmia; and
a lead electrode assembly comprising;
a proximal connector end for coupling to the implantable canister;
a distal end having a distal tip with a distal tip electrode;
an elongated body extending between the proximal connector end and the distal end; and
a defibrillation electrode;
wherein the distal tip electrode is spaced from the defibrillation electrode by a portion of the elongated body having a length of at least nineteen (19) millimeters, with no other electrode therebetween;
wherein the implantable canister is configured to enable insertion of the lead electrode assembly for operation therewith.
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Abstract
Methods and implantable cardiac stimulus devices that include leads designed to avoid post-shock afterpotentials. Some examples are directed toward lead-electrode designs that reduce the impact of an applied stimulus on sensing attributes. These examples may find particular use in systems that provide both sensing and therapy delivery from subcutaneous location.
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Citations
20 Claims
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1. An implantable defibrillator system for subcutaneous placement comprising:
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an implantable canister housing operational circuitry for sensing electrical cardiac activity and delivering electrical stimulus to correct arrhythmia; and a lead electrode assembly comprising; a proximal connector end for coupling to the implantable canister; a distal end having a distal tip with a distal tip electrode; an elongated body extending between the proximal connector end and the distal end; and a defibrillation electrode; wherein the distal tip electrode is spaced from the defibrillation electrode by a portion of the elongated body having a length of at least nineteen (19) millimeters, with no other electrode therebetween; wherein the implantable canister is configured to enable insertion of the lead electrode assembly for operation therewith. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An implantable defibrillator system for subcutaneous placement comprising:
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an implantable canister housing operational circuitry for sensing electrical cardiac activity and delivering electrical stimulus to correct arrhythmia; and a lead electrode assembly comprising; a proximal connector end for coupling to the implantable canister; a distal end having a distal tip; an elongated body extending between the proximal connector end and the distal end; a defibrillation electrode; and a proximal sensing electrode proximal of the defibrillation electrode; wherein the proximal sensing electrode is spaced from the defibrillation electrode by a portion of the elongated body having a length of nineteen (19) millimeters up to twenty-nine (29) millimeters, with no other electrode therebetween; wherein the implantable canister is configured to enable insertion of the lead electrode assembly for operation therewith. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification