Abstract: A system includes a first electrode at a tip of a tunneling tool and a second electrode. The system includes a circuit configured to determine whether the tip of the tunneling tool is within subcutaneous fat tissue or muscle tissue of a patient based on a measurement of an impedance between the first electrode and the second electrode.

Abstract: An implantable medical device is provided for sensing cardiac activity within a patient's body. The device comprises a canister, control circuitry disposed within the canister, and a lead assembly extending from the canister. At least one sense electrode is coupled to the circuitry and disposed on the lead assembly for sensing cardiac activity. At least one spacer is coupled between the lead assembly and the canister for maintaining a minimum predetermined distance between the at least one sense electrode and the canister.

Abstract: A system includes a first electrode at a tip of a tunneling tool and a second electrode. The system includes a circuit configured to determine whether the tip of the tunneling tool is within subcutaneous fat tissue or muscle tissue of a patient based on a measurement of an impedance between the first electrode and the second electrode.

Abstract: A lead including one or more electrodes having circuitry associated therewith. Each such electrode includes a circuit extending along and conforming to at least a portion of an inner surface of the electrode. The circuit includes an isolation substrate contacting at least a portion of the inner surface of the cylindrical electrode portion, a first contact electrically isolated from the electrode portion by the isolation substrate and an integrated circuit electrically coupled to the first contact and the electrode.

Abstract: An implantable medical device system includes a medical electrical lead having a connector assembly and a connector bore for receiving the lead connector assembly. The lead includes a distal portion having a first outer diameter and a distal sealing member, an intermediate portion having a second outer diameter smaller than the first outer diameter, and a connector pin extending from the intermediate portion, the connector pin having an outer diameter corresponding to a DF-1 standard.

Abstract: An implantable medical device and method are provided for determining if a patient is in a substantially horizontal position and delaying a programmed cardioversion/defibrillation shock therapy in response to determining the patient is in a substantially horizontal position. In various embodiments, the shock therapy may be delayed by adjusting tachycardia detection criteria or scheduling the shock therapy after a maximum tachycardia episode duration.

Abstract: Techniques for presenting a three-dimensional (3D) anatomical representation of an anatomical structure are described. 3D models of various anatomical structures may be stored as prepackaged anatomical data. A user device, e.g., a networked workstation, may receive the prepackaged anatomical data from a networked computing device, e.g., a server, and present at least a portion of a 3D model as a 3D anatomical representation. The user device may also present a menu with the 3D anatomical representation that allows the user to manipulate the 3D anatomical representation and measure various aspects of the 3D anatomical representation. In some examples, the user device may also present a representation of a medical device in conjunction with the 3D anatomical representation.

Abstract: A medical device that includes a lead having a lead body extending from a proximal end to a distal end, and a housing having a connector block for receiving the proximal end of the lead body. A fixation mechanism is positioned proximal to an electrode coil located at the distal end of the lead body, and a fixation member or a plurality of fixation members extend from the fixation mechanism from a fixation member proximal end to a fixation member distal end. The fixation members are advanceable from a first position corresponding to the fixation member distal end being positioned along the lead during subcutaneous placement of the lead, to a second position corresponding to the fixation member distal end being positioned away from the lead to fixedly engage the lead at a target site.

Abstract: A subcutaneous implantable device is provided that includes a defibrillation electrode disposed along a portion of a lead, and a lead tip connected to the lead. The lead tip includes a trailing end coupled to a distal end of the lead, and first and second non-parallel sides extending from the trailing end that converge to a leading end that is configured to wedge between tissue layers as the lead is advanced subcutaneously.

Abstract: The invention is directed to medical leads for use with implantable medical devices. Various features of medical leads are described, many of which may be useful in a variety of different leads, e.g., used in a variety of different applications. In one embodiment, the invention provides a medical lead of varying stiffness characteristics. In another embodiment, the invention provides a medical lead having a semi-conical shaped distal tip that becomes wider at more distal tip locations. In either case, described lead features may be particularly useful for J-shaped lead configurations used for implantation in a patient's right atrium. Many other types of leads, however, could also benefit from various aspects of the invention.

Abstract: A fixation device for a subcutaneous implantable medical device includes a deformable tip portion that reduces in width when coupled with a fixation tool such that implantation of the implantable medical device through tissue is facilitated. Upon release from the fixation tool, the fixation device returns to its initial shape and stably secures the position of the implantable medical device.

Abstract: A subcutaneously implantable lead includes a coil disposed along a portion of the lead, and a lead tip coupled to a distal end of the lead. The lead tip includes at least one component that is movable relative to the distal end of the lead and configured to anchor the lead tip in subcutaneous tissue.

Abstract: A fixation device for a subcutaneous implantable medical device includes a deformable tip portion that reduces in width when coupled with a fixation tool such that implantation of the implantable medical device through tissue is facilitated. Upon release from the fixation tool, the fixation device returns to its initial shape and stably secures the position of the implantable medical device.

Abstract: A fixation device for a subcutaneous implantable medical device includes a deformable tip portion that reduces in width when coupled with a fixation tool such that implantation of the implantable medical device through tissue is facilitated. Upon release from the fixation tool, the fixation device returns to its initial shape and stably secures the position of the implantable medical device.

Abstract: A lead including one or more electrodes (e.g., electrodes, such as those having circuitry associated therewith).

Abstract: A floating adapter is configured to electrically couple an auxiliary lead assembly to an implantable medical device including a canister. The floating adapter comprises a connector configured to receive an end of the auxiliary lead assembly, and a conductor having a proximal end and a distal end. The distal end of the conductor is coupled to the connector, and the proximal end of the conductor is coupled to a collector. The collector, the connector, and the conductor form a current flow path between the canister and the auxiliary lead assembly when the conductive body is implanted proximate the canister.

Abstract: A system includes a first electrode at a tip of a tunneling tool and a second electrode. The system includes a circuit configured to determine whether the tip of the tunneling tool is within subcutaneous fat tissue or muscle tissue of a patient based on a measurement of an impedance between the first electrode and the second electrode.

Abstract: A medical electrical system includes a device including a connector port and an external electrically active surface and an auxiliary lead including a supplemental electrode and a connector end. The external electrically active surface of the device is adapted to receive the auxiliary lead connector end, thereby electrically coupling the supplemental electrode to the device via contact between the connector end and the external surface.

Abstract: A subcutaneous implantable device is provided that includes a defibrillation electrode disposed along a portion of a lead, and a lead tip connected to the lead. The lead tip includes a trailing end coupled to a distal end of the lead, and first and second non-parallel sides extending from the trailing end that converge to a leading end that is configured to wedge between tissue layers as the lead is advanced subcutaneously.

Abstract: A subcutaneously implantable lead includes a coil disposed along a portion of the lead, and a lead tip coupled to a distal end of the lead. The lead tip includes at least one component that is movable relative to the distal end of the lead and configured to anchor the lead tip in subcutaneous tissue.