Leadless cardiac pacing devices
Implantable leadless pacing devices and medical device systems including an implantable leadless pacing device are disclosed. An example implantable leadless pacing device may include a pacing capsule. The pacing capsule may include a housing. The housing may have a proximal region and a distal region. A first electrode may be disposed along the distal region. One or more anchoring members may be coupled to the distal region. The anchoring members may each include a region with a compound curve.
1. An implantable leadless pacing device, comprising:
a pacing capsule including a housing, the housing having a proximal region and a distal region;
a first electrode extending distally from the distal region; and
a plurality of anchoring members, each of the plurality of anchoring members including a base region coupled to the distal region of the housing and a pointed distal tip configured for penetrating tissue;
wherein each of the plurality of anchoring members includes a first curved region and a straight region;
wherein the straight region is located between the first curved region and the distal tip; and
wherein each of the plurality of anchoring members includes a second curved region, the second curved region located between the straight region and the distal tip.
2. The implantable leadless pacing device of claim 1 , wherein the first curved region is oriented in a first direction and wherein the second curved region is oriented in a second direction different from the first direction.
3. The implantable leadless pacing device of claim 2 , wherein the first direction is opposite the second direction.
4. The implantable leadless pacing device of claim 2 , wherein the first curved region, the second curved region or both have a radius of curvature that varies.
5. The implantable leadless pacing device of claim 1 , wherein the second curved region has a radius of curvature that varies.
6. The implantable leadless pacing device of claim 1 , wherein the first curved region has a radius of curvature that varies.
7. The implantable leadless pacing device of claim 1 , wherein each of the plurality of anchoring members is capable of shifting between a first elongated configuration and a deployed configuration, and wherein each of the plurality of anchoring members includes the first curved region when in the deployed configuration.
8. An implantable leadless pacing device, comprising:
a pacing capsule including a housing, the housing having a proximal region and a distal region;
a first electrode extending distally from the distal region; and
a plurality of anchoring members, each of the plurality of anchoring members including a base region coupled to the distal region of the housing and a sharpened distal tip configured for penetrating tissue;
wherein each of the plurality of anchoring members is configured to assume a deployed configuration;
wherein each of the plurality of anchoring members includes a first curved region and a straight region in the deployed configuration;
wherein the straight region is located between the first curved region and the distal tip;
wherein each of the plurality of anchoring members includes a second curved region in the deployed configuration, the second curved region located between the straight region and the distal tip; and
wherein the distal tip is located proximal of the first curved region in the deployed configuration.
9. The implantable leadless pacing device of claim 8 , wherein each of the plurality of anchoring member is configured to deflect from the deployed configuration into an elongated configuration during delivery through a vasculature.
10. The implantable leadless pacing device of claim 8 , wherein the first curved region extends distal of the first electrode in the deployed configuration.
11. The implantable leadless pacing device of claim 10 , wherein the distal tip is located proximal of the first electrode in the deployed configuration.
12. An implantable leadless pacing device system, the system comprising:
a delivery catheter having a proximal section, a distal holding section, and a lumen formed therein;
a push member slidably disposed within the lumen; and
a leadless pacing device slidably received within the distal holding section, the leadless pacing device comprising:
a housing having a proximal region and a distal region,
a first electrode extending distally from the distal region, and
a plurality of anchoring members, each of the plurality of anchoring members a base region coupled to the distal region of the housing and a pointed distal tip configured for penetrating tissue;
wherein each of the plurality of anchoring members is capable of shifting between an elongated configuration when the leadless pacing device is disposed within the distal holding section and a deployment configuration when the leadless pacing device is advanced out from the distal holding section;
wherein each of the plurality of anchoring members includes a first curved region and a straight region in the deployed configuration;
wherein the straight region is located between the first curved region and the distal tip;
wherein each of the plurality of anchoring members includes a second curved region in the deployed configuration, the second curved region located between the straight region and the distal tip; and
wherein the distal tip is located proximal of the first curved region in the deployed configuration.
13. The system of claim 12 , wherein the second curved region contacts in inner surface of the distal holding section in the elongated configuration.
14. The system of claim 12 , wherein the first curved region has a radius of curvature that varies.