Electrode spacing in a subcutaneous implantable cardiac stimulus device
First Claim
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1. A method of treating a patient comprising:
- implanting a cardiac stimulus system into a patient, the cardiac stimulus system including a canister having an electrode and a defibrillation lead having proximal and distal ends, the proximal end being connected to the canister, the defibrillation lead including a distal tip with a distal sensing electrode disposed at the distal tip, and a distal portion having a defibrillation coil and a distal sensing electrode disposed distal of the defibrillation coil, such that each of the canister and the defibrillation lead are implanted subcutaneously over the ribs of the patient;
wherein the cardiac stimulus system, once implanted, is configured to;
deliver stimulus to the patient using the defibrillation coil and the canister electrode; and
sense cardiac activity of the patient following delivery of the stimulus using the distal sensing electrode; and
wherein the defibrillation lead is constructed such that a gap is defined between a proximal side of the distal sense electrode and a distal end of the defibrillation coil, and the gap is at least nineteen (19) millimeters, with no other electrode therebetween.
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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.
89 Citations
20 Claims
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1. A method of treating a patient comprising:
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implanting a cardiac stimulus system into a patient, the cardiac stimulus system including a canister having an electrode and a defibrillation lead having proximal and distal ends, the proximal end being connected to the canister, the defibrillation lead including a distal tip with a distal sensing electrode disposed at the distal tip, and a distal portion having a defibrillation coil and a distal sensing electrode disposed distal of the defibrillation coil, such that each of the canister and the defibrillation lead are implanted subcutaneously over the ribs of the patient; wherein the cardiac stimulus system, once implanted, is configured to; deliver stimulus to the patient using the defibrillation coil and the canister electrode; and sense cardiac activity of the patient following delivery of the stimulus using the distal sensing electrode; and wherein the defibrillation lead is constructed such that a gap is defined between a proximal side of the distal sense electrode and a distal end of the defibrillation coil, and the gap is at least nineteen (19) millimeters, with no other electrode therebetween. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of treating a patient comprising:
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implanting a cardiac stimulus system into a patient'"'"'s including implanting a canister having an electrode and a defibrillation lead having proximal and distal ends, the proximal end being connected to the canister, the defibrillation lead including a distal tip with a distal sensing electrode disposed at the distal tip, and a distal portion having a defibrillation coil and a proximal sensing electrode disposed proximal of the defibrillation coil, such that each of the canister and the defibrillation lead are implanted subcutaneously over the ribs of the patient; wherein the cardiac stimulus system, once implanted, is configured to; deliver stimulus to the patient using the defibrillation coil and the canister electrode; and sense cardiac activity of the patient following delivery of the stimulus using at least the proximal sensing electrode;
wherein the defibrillation lead is constructed as follows;the distance from the proximal end of the defibrillation coil to a distal side of the proximal sense electrode is approximately nineteen (19) millimeters or greater, with no other electrode therebetween. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A subcutaneous defibrillation lead comprising:
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a proximal connector end for coupling to an implantable cardioverter-defibrillator 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; a defibrillation electrode; and a proximal sensing electrode proximal of the defibrillation electrode such that the defibrillation electrode is disposed between the proximal sensing electrode and the distal tip electrode; wherein the proximal sensing 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; and 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. - View Dependent Claims (19, 20)
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Specification