Delivery of cardiac stimulation devices
First Claim
1. A wireless pacing electrode delivery system, comprising:
- a guide sheath including a distal end and a lumen extending to the distal end; and
an intravascularly-deliverable medical device positionable within the lumen of the guide sheath;
a fixation device attached to and extending away from the medical device, wherein the fixation device is configured to engage heart wall tissue, the fixation device configured to be advanced distal of the distal end of the guide sheath to engage the heart wall tissue;
wherein the fixation device includes four tines attached to and extending distally from a ring, the four tines having a non-deployed configuration and a deployed configuration, wherein in the non-deployed configuration the four tines point distally toward the heart wall tissue to pierce into the heart wall tissue without penetrating entirely through the heart wall, and wherein the four tines are biased to curl outwardly to the deployed configuration when unconstrained to engage the heart wall tissue.
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Accused Products
Abstract
Some embodiments of an electrical stimulation system employ wireless electrode assemblies to provide pacing therapy, defibrillation therapy, or other stimulation therapy. In certain embodiments, the wireless electrode assemblies may include a guide wire channel so that each electrode assembly can be advanced over a guide wire instrument through the endocardium. For example, a distal tip portion of a guide wire instrument can penetrate through the endocardium and into the myocardial wall of a heart chamber, and the electrode assembly may then be advanced over the guide wire and into the heart chamber wall. In such circumstances, the guide wire instrument (and other portions of the delivery system) can be retracted from the heart chamber wall, thereby leaving the electrode assembly embedded in the heart tissue.
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Citations
18 Claims
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1. A wireless pacing electrode delivery system, comprising:
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a guide sheath including a distal end and a lumen extending to the distal end; and an intravascularly-deliverable medical device positionable within the lumen of the guide sheath; a fixation device attached to and extending away from the medical device, wherein the fixation device is configured to engage heart wall tissue, the fixation device configured to be advanced distal of the distal end of the guide sheath to engage the heart wall tissue; wherein the fixation device includes four tines attached to and extending distally from a ring, the four tines having a non-deployed configuration and a deployed configuration, wherein in the non-deployed configuration the four tines point distally toward the heart wall tissue to pierce into the heart wall tissue without penetrating entirely through the heart wall, and wherein the four tines are biased to curl outwardly to the deployed configuration when unconstrained to engage the heart wall tissue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A wireless pacing electrode delivery system, comprising:
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a guide sheath including a lumen; and an intravascularly-deliverable medical device positionable within the lumen of the guide sheath and configured to be advanced out of a distal opening of the guide sheath to engage heart wall tissue; a fixation device attached to and extending away from the medical device, the fixation device including four tines attached to and extending distally from a ring; wherein the four tines are constrained in a non-deployed configuration when positioned within the lumen of the guide sheath and biased toward a deployed configuration when unconstrained, wherein the four tines are curled outwardly in the deployed configuration; wherein the four tines are configured to pierce into the heart wall tissue without penetrating entirely through the heart wall tissue to an opposite face of the heart wall tissue to engage the heart wall tissue when in the deployed configuration. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification