Cardiac Stimulation system
First Claim
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1. A wireless electrode assembly for electrical stimulation of heart tissue, comprising:
- a body portion at least partially containing a circuit to deliver electrical energy to an electrode to electrically stimulate heart wall tissue;
a first fixation structure extending from the body portion in a generally forward orientation and being biased to shift from a retained condition to an outwardly extended condition to engage heart wall tissue; and
a second fixation structure extending from the body portion in a generally rearward orientation and being to shift from a retained condition to an outwardly extended condition to engage heart wall tissue.
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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.
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Citations
22 Claims
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1. A wireless electrode assembly for electrical stimulation of heart tissue, comprising:
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a body portion at least partially containing a circuit to deliver electrical energy to an electrode to electrically stimulate heart wall tissue;
a first fixation structure extending from the body portion in a generally forward orientation and being biased to shift from a retained condition to an outwardly extended condition to engage heart wall tissue; and
a second fixation structure extending from the body portion in a generally rearward orientation and being to shift from a retained condition to an outwardly extended condition to engage heart wall tissue. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A wireless electrode assembly at least partially implantable through an interior surface of a heart chamber wall, the electrode assembly comprising:
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a body portion having an electrode for electrically stimulating cardiac tissue;
a first set of tines biased outwardly and extending forwardly from a rearward radial periphery of the body portion, the first set of tines opposing a rearward portion, but not a forward portion, of the body portion from being advanced into the heart chamber wall when the electrode assembly is longitudinally advanced in a forward direction toward the interior surface of the heart chamber wall; and
a second set of tines extending rearwardly and biased outwardly from a forward radial periphery of the body portion, the second set of tines opposing the forward portion of the body portion from becoming dislodged from heart wall tissue after the longitudinal advancement of the forward body portion into the heart chamber wall. - View Dependent Claims (9, 10, 11, 12)
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13. An electrode delivery system, the system comprising:
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a wireless electrode assembly including a body portion and first and second tines that are biased to shift from a loaded condition to an outwardly extended condition to secure the body portion to a heart chamber wall, the first and second biased tines generally opposing one another; and
a delivery catheter to direct the wireless electrode assembly through a heart chamber and toward an interior surface of a heart chamber wall, the delivery catheter including an opening in a distal end such that, when the wireless electrode assembly is separated from the opening in the distal end of the catheter, the first and second tines shift from the loaded condition to the outwardly extended condition. - View Dependent Claims (14, 15, 16, 17)
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18. A method of inserting a wireless electrode assembly into a heart chamber wall, comprising:
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inserting a set of distal tines of a wireless electrode assembly through a portion of endocardium and into a heart chamber wall, the set of distal tines being biased to shift from a retained condition to an outwardly extended condition to secure the wireless electrode assembly to a heart chamber wall; and
causing a set of proximal tines of the wireless electrode assembly to shift from a retained condition to an outwardly extended condition to secure the wireless electrode assembly to the heart chamber wall, the set of distal tines extending in a generally rearward orientation when in the outwardly extended condition and the set of proximal tines extending in a generally forward orientation when in the outwardly extended condition. - View Dependent Claims (19, 20, 21, 22)
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Specification