Distributed anode cardiac pacing and sensing
First Claim
1. A method for use when pacing and sensing in a chamber of a patient'"'"'s heart using a lead that includes a first group of at least two electrically isolated electrodes within 5 mm of one another and using a further electrode that is at least 10 mm from the first group, comprising:
- (a) when pacing, using as a pacing cathode at least one of the electrodes of the first group;
(b) when pacing, using as a pacing anode at least one of the electrodes of the first group that is not used as the pacing cathode, together with the further electrode that is at least 10 mm from the first group also being used as the pacing anode;
(c) when sensing, using as the sensing cathode the same electrode(s) that is/are used as the pacing cathode when pacing at step (a); and
(d) when sensing, using as the sensing anode the same electrodes that are used as the pacing anode when pacing at step (b).
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Accused Products
Abstract
Embodiments of the present invention are directed to devices, systems and methods for pacing and sensing, in a chamber of a patient'"'"'s heart, that provide for good sensed R wave amplitudes and capture thresholds, yet avoids extracardiac stimulation. Such benefits are achieved by using what is referred to herein as a “distributed” anode, where one portion of the anode is within 5 mm of the cathode, but another portion of the anode is at least 10 mm from the cathode. While especially useful for pacing and sensing in the left ventricle, embodiments of the present invention can be used to pace and sense in any chamber of the heart.
41 Citations
25 Claims
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1. A method for use when pacing and sensing in a chamber of a patient'"'"'s heart using a lead that includes a first group of at least two electrically isolated electrodes within 5 mm of one another and using a further electrode that is at least 10 mm from the first group, comprising:
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(a) when pacing, using as a pacing cathode at least one of the electrodes of the first group; (b) when pacing, using as a pacing anode at least one of the electrodes of the first group that is not used as the pacing cathode, together with the further electrode that is at least 10 mm from the first group also being used as the pacing anode; (c) when sensing, using as the sensing cathode the same electrode(s) that is/are used as the pacing cathode when pacing at step (a); and (d) when sensing, using as the sensing anode the same electrodes that are used as the pacing anode when pacing at step (b). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An implantable cardiac stimulation system, comprising:
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pacing circuitry; sensing circuitry; a lead that includes a first group of at least two electrically isolated electrodes within 5 mm of one another; and a further electrode that is at least 10 mm from the first group; wherein, during pacing, a pacing cathode operably connected to the pacing circuitry includes at least one of the electrodes of the first group, and a pacing anode operably connected to the pacing circuitry includes at least one of the electrodes of the first group that is not used as the pacing cathode, together with the further electrode that is at least 10 mm from the first group also operably connected to the pacing circuitry as the pacing anode; and wherein, during sensing, a sensing anode includes the same electrodes as the pacing anode that are instead operably connected to the sensing circuitry, and a sensing cathode includes the same electrode(s) as the pacing cathode that is/are instead operably connected to the sensing circuitry. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A lead, comprising:
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first and second electrically isolated conductors; first and second electrically isolated electrodes within 5 mm of one another; and a third electrode at least 10 mm from the first and second electrodes; wherein the first electrode is hardwired to the second conductor for use as a cathode; and wherein the second and third electrodes are hardwired to the first conductor for use as an anode at the same time. - View Dependent Claims (25)
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Specification