Cardiac stimulation system
First Claim
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1. A system, comprising:
- a wireless electrode assembly comprising;
a body;
an electrode to electrically stimulate tissue, the electrode immovably fixed to the body;
a circuit coupled to the electrode and configured to deliver to the electrode electrical energy to stimulate the tissue, the circuit housed within the body; and
wherein the body is sized and shaped for percutaneous delivery into contact with heart wall tissue, the body including a proximally-located portion and a fixation device configured to securely anchor the wireless electrode assembly to a tissue site;
wherein the wireless electrode assembly is configured to be securely anchored to the tissue site using the fixation device in response to user manipulation of the wireless electrode assembly using a first elongate member configured to engage the proximally-located portion of the body of the wireless electrode assembly;
wherein the fixation device comprises a curved tine biased to shift from a loaded configuration to an outwardly extending configuration, wherein in the loaded configuration, the curved tine is oriented in a distal direction, wherein the curved tine includes a base immovably fixed to the body in both the loaded configuration and the outwardly extending configuration;
wherein in the outwardly extending configuration, the curved tine includes a first region extending from the base in a distal direction and a second region extending in a proximal direction to a tip of the curved tine, the first and second regions separated by an apex of curvature, wherein the curved tine is configured to engage the heart wall tissue and hinder migration of the wireless electrode assembly; and
wherein the base of the curved tine and the electrode both remain immovably fixed to the body while the curved tine shifts from the loaded configuration to the outwardly extending configuration.
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Abstract
Some embodiments of pacing systems employ wireless electrode assemblies to provide pacing therapy. The wireless electrode assemblies may wirelessly receive energy via an inductive coupling so as to provide electrical stimulation to the surrounding heart tissue. In certain embodiments, the wireless electrode assembly may include one or more biased tines that shift from a first position to a second position to secure the wireless electrode assembly into the inner wall of the heart chamber.
379 Citations
18 Claims
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1. A system, comprising:
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a wireless electrode assembly comprising; a body; an electrode to electrically stimulate tissue, the electrode immovably fixed to the body; a circuit coupled to the electrode and configured to deliver to the electrode electrical energy to stimulate the tissue, the circuit housed within the body; and wherein the body is sized and shaped for percutaneous delivery into contact with heart wall tissue, the body including a proximally-located portion and a fixation device configured to securely anchor the wireless electrode assembly to a tissue site; wherein the wireless electrode assembly is configured to be securely anchored to the tissue site using the fixation device in response to user manipulation of the wireless electrode assembly using a first elongate member configured to engage the proximally-located portion of the body of the wireless electrode assembly; wherein the fixation device comprises a curved tine biased to shift from a loaded configuration to an outwardly extending configuration, wherein in the loaded configuration, the curved tine is oriented in a distal direction, wherein the curved tine includes a base immovably fixed to the body in both the loaded configuration and the outwardly extending configuration; wherein in the outwardly extending configuration, the curved tine includes a first region extending from the base in a distal direction and a second region extending in a proximal direction to a tip of the curved tine, the first and second regions separated by an apex of curvature, wherein the curved tine is configured to engage the heart wall tissue and hinder migration of the wireless electrode assembly; and wherein the base of the curved tine and the electrode both remain immovably fixed to the body while the curved tine shifts from the loaded configuration to the outwardly extending configuration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method, comprising:
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delivering an intravascularly-deliverable wireless electrode assembly to a tissue site via an intravascular route using a first intravascularly-deliverable elongate member configured to engage a proximally-located portion of the intravascularly-deliverable wireless electrode assembly, the intravascularly-deliverable wireless electrode assembly comprising; a body; an electrode to electrically stimulate tissue, the electrode immovably fixed to the body; a circuit coupled to the electrode and configured to deliver to the electrode electrical energy to stimulate the tissue, the circuit housed within the body; and wherein the body is sized and shaped for percutaneous transluminal delivery into contact with inner heart wall tissue via an intravascular route and to fit entirely within a heart, the body including a fixation device configured to securely anchor the wireless electrode assembly to a tissue site; and securely anchoring the intravascularly-deliverable wireless electrode assembly to the tissue site using the fixation device in response to user manipulation of the wireless electrode assembly, using the first intravascularly-deliverable elongate member; wherein the fixation device comprises a curved tine biased to shift from a loaded configuration to an outwardly extending configuration, wherein in the loaded configuration, the curved tine is oriented in a distal direction, wherein the curved tine includes a base immovably fixed to the body in both the loaded configuration and the outwardly extending configuration; wherein the outwardly extending configuration, the curved tine includes a first region extending from the base in a distal direction and a second region extending in a proximal direction to a tip of the curved tine, the first and second regions separated by an apex of a curvature, wherein the curved tine is configured to engage the heart wall tissue and hinder migration of the wireless electrode assembly; and wherein the base of the curved tine and the electrode both remain immovably fixed to the body while the curved tine shifts from the loaded configuration to the outwardly extending configuration. - View Dependent Claims (17)
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18. An implantable medical device for implanting in a heart chamber, comprising:
a wireless electrode assembly including; a body member having a proximal end and a distal end and a length measured from the proximal end to the distal end, the body member being configured to be positioned entirely within a chamber of a heart; an electrode immovably fixed to the distal end of the body member; a circuit positioned within the body member, the circuit electrically coupled to the electrode to delivery electrical energy to the electrode to stimulate cardiac tissue; and a plurality of tines, configured to engage cardiac tissue, wherein each of the plurality of tines has a base portion immovably fixed to the body member and a tip opposite the base portion, wherein each of the plurality of tines is biased to move from a constrained, loaded configuration in which the base portion is immovably fixed to the body member and the tip of each of the plurality of tines is pointed distally to an unconstrained, curved configuration in which the base portion is immovably fixed to the body member and the tip of each of the plurality of tines is pointed proximally; wherein in the unconstrained, curved configuration, the curved tine engages the heart wall tissue and hinders migration of the wireless electrode assembly; and wherein the base portion of the curved tine and the electrode both remain immovably fixed to the body while the curved tine shifts from the loaded configuration to the unconstrained configuration.
Specification