Abstract: In at least one embodiment, a system and method for implanting an implantable medical device (IMD) within a patient may include an IMD including a housing and an attachment member, and a delivery catheter including a tethering snare that is configured to be selectively extended out of the delivery catheter and retracted into the delivery catheter. In at least one embodiment, a system and method for implanting an implantable medical device (IMD) within a patient may include an IMD including a housing and an attachment member, wherein the attachment member includes a central passage connected to a connection chamber, and a delivery catheter including first and second tethers that may be moved outwardly from and retracted into the delivery catheter.

Abstract: Disclosed herein is an implantable electronic device. The device includes a housing and a header connector assembly coupled to the housing. The header connector assembly includes a DF4/IS4 assembly and a header including a bore. The DF4/IS4 assembly is locked within the bore via a locking datum arrangement that exists between the DF4/IS4 assembly and the header.

Abstract: An implantable system includes a first leadless pacemaker (LP1) implanted in or on a first chamber of a heart and a second leadless pacemaker (LP2) implanted in or on a second chamber of the heart. The LP1 is configured to time delivery of one or more pacing pulses delivered to the first chamber of the heart based on timing of cardiac activity associated with the second chamber of the heart detected by the LP1 itself. The LP1 is also configured to transmit implant-to-implant (i2i) messages to the LP2. The LP2 is configured to time delivery of one or more pacing pulses delivered to the second chamber of the heart based on timing of cardiac activity associated with the second chamber of the heart as determined based on one or more i2i messages received by the LP2 from the LP1.

Abstract: Embodiments described herein relate to implantable medical devices (IMDs) and methods for use therewith. Such a method includes enabling a communication capability of an IMD during a message alert period and monitoring for a message while the communication capability is enabled during the message alert period. In response to receiving a message during the message alert period, there is a determination whether the message is valid or invalid. If the message is invalid, the message is ignored, and an invalid message count is incremented. A further message is monitored for during the message alert period occurs, when the invalid message count has not yet reached a corresponding invalid message count threshold. The communication capability of the IMD is disabled for a disable period, when the invalid message count reaches the corresponding invalid message count threshold. If a valid message is received, the IMD acts upon information included therein.

Abstract: An implantable system includes a first leadless pacemaker (LP1) implanted in or on a first chamber of a heart and a second leadless pacemaker (LP2) implanted in or on a second chamber of the heart. The LP1 uses at least two of its electrodes to transmit and receive implant-to-implant (i2i) messages to and from the LP2. During one or more periods of time, the LP1 times delivery of pacing pulse(s) to the first chamber of the heart based on timing of cardiac activity associated with the second chamber of the heart detected by the LP1 itself. During one or more further periods of time, the LP1 times delivery of pacing pulse(s) to the first chamber of the heart based on timing of cardiac activity associated with the second chamber of the heart as determined based on one or more i2i messages received by the LP1 from the LP2.

Abstract: An implantable system including an atrial leadless pacemaker (aLP) and a ventricular leadless pacemaker (vLP), and methods for use therewith, are configured or used to terminate a pacemaker mediated tachycardia (PMT). One of the aLP or the vLP detects a PMT and informs the other one. The aLP initiates a PMT PA interval that is shorter than a PA interval that the aLP would otherwise use for atrial pacing if a PMT was not detected. The vLP initiates a PMT PV interval that is longer than the PMT PA interval. If an intrinsic atrial or ventricular event is detected before PMT PA interval or the PMT PV interval expires, then these intervals will be terminated, otherwise an atrial chamber will be paced if the PMT PA interval expires, and/or a ventricular chamber will be paced if the PMT PV interval expires. This should have the effect of terminating the PMT.

Abstract: A leadless pacemaker (LP) is configured to be implanted in or on a cardiac chamber. The LP includes a first housing made of an electrically conductive material, a second housing made of an electrically conductive material, and an inter-housing insulator between the first and second housings and electrically isolating the first and second housings from one another. Electronic circuitry within the first housing includes pulse generator(s), sense amplifier(s), and a controller. A battery within the second housing provides power to the electronic circuitry via conductors that electrically couple poles of the battery to the electronic circuitry within the first housing. The LP includes two or more electrodes including at least one tip electrode and at least one ring electrode. At least two of the electrodes are selectively couplable to a pulse generator to enable delivery of pacing pulses to the cardiac chamber in or on which the LP is implanted.

Abstract: A method of producing an oxide layer on a foil for use in a capacitor includes immersing the foil in a first solution; maintaining a target current between the immersed anodic foil and the first solution until a first target voltage is reached to form an oxide layer overlying the foil; maintaining the target current between the immersed foil and the first solution until a second target voltage is reached to reform the oxide layer; removing the foil from the first solution and heating the foil; immersing the heat treated foil in a second solution; maintaining the target current between the immersed foil and the second solution until a third target voltage is reached; and discharging the immersed foil after each of the first, second, and third target voltages are reached.

Abstract: Embodiments described herein relate to an implantable device that include an inductor coil, a storage capacitor, active circuitry, and a sensor, but doesn't include an electrochemical cell, and methods for use therewith. During first periods of time, the storage capacitor accumulates and stores energy received via the inductor coil from a non-implanted device. During second periods of time, interleaved with the first periods of time, and during which energy is not received from the non-implanted device, the active circuitry of the implantable device is powered by the energy stored on the storage capacitor and is used to perform at least one of a plurality of predetermined operations of the implantable device, including, e.g., obtaining a sensor measurement from the sensor of the implantable device, transmitting a communication signal including a sensor measurement to the non-implanted device, and/or receiving a communication signal from the non-implanted device.

Abstract: Embodiments describe herein generally pertain to implantable medical device (IMDs), and methods for use therewith, that can be used to automatically switch an IMD from its normal operational mode to an MRI safe mode, and vice versa, within increased specificity. In certain embodiments, a controller of the IMD uses a magnetic field sensor to determine whether a first magnetic field condition is detected, and uses an accelerometer to determine whether a positional condition is detected. In response to the first magnetic field condition being detected, and the positional condition being detected, the controller can use the magnetic field sensor to determine whether a second magnetic field condition is detected, which differs from the first magnetic field condition. The controller can then cause the IMD to enter the MRI safe mode based at least in part on the first and second magnetic field conditions and the positional condition being detected.

Abstract: Methods and systems are provided to manage display of cardiac signals. The methods and systems receive a first data steam along a first communications path conveyed with first throughput and receiving a second data stream along a second communications path transmitted with second throughput. The first and second throughputs are asynchronous with respect to one another. The first and second data streams carry cardiac signals sensed by external and implanted electrodes, respectively, for one or more common events. The methods and systems store data from the first and second data streams in first and second memory buffers. The methods and systems synchronize the data stored in the first and second memory buffers with one another by performing at least one of: temporally offsetting activation of the storing operation for the first and second data streams with respect to one another; or managing an amount of the data maintained in at least one of the first memory buffer or the second memory buffer.

Abstract: A pulse generator comprises a header connector assembly coupled with a housing. The header connector assembly includes a connector assembly and a header enclosing the connector assembly. The connector assembly includes an electrically insulative segment, a first electrically conductive segment, and a second electrically conductive segment axially spaced apart from the first electrically conductive segment by the electrically insulative segment. Each electrically conductive segment includes a connector ring, a spring housing and a spring supported by the spring housing. The connector ring and spring housing are in electrical communication with each other. The electrically insulative segment includes an insulator ring that is positioned between the first and second electrically conductive segments. The insulator ring includes a first end and a second end axially opposite the first end.

Abstract: Disclosed herein is a battery with a pouch-type enclosure for use with an implantable electronic device. The battery may have greater than 20 megaohms of isolation between the anode and the external surface of the pouch-type battery enclosure and the cathode and the external surface of the pouch-type battery enclosure. The battery may have a pouch-type enclosure with a contoured shape, including a cathode, anode, and electrolyte disposed within the pouch-type enclosure. The cathode and/or anode may have variable thicknesses. The variable thickness anode and/or cathode may be contoured in shape to at least partially provide the contoured shape of the pouch-type enclosure.

Abstract: Fabricating a capacitor includes using a fluid jet to form a conduit in a sheet of material. A capacitor can include at least a portion of the sheet of material in an anode. In some instances, the sheet of material is porous before the fluid jet is used to form the conduit.

Abstract: Embodiments describe herein generally pertain to implantable medical device (IMDs), and methods for use therewith, that can be used to automatically switch an IMD from its normal operational mode to an MRI safe mode, and vice versa, within increased specificity. In certain embodiments, a controller of the IMD uses a magnetic field sensor to determine whether a first magnetic field condition is detected, and uses an accelerometer to determine whether a positional condition is detected. In response to the first magnetic field condition being detected, and the positional condition being detected, the controller can use the magnetic field sensor to determine whether a second magnetic field condition is detected, which differs from the first magnetic field condition. The controller can then cause the IMD to enter the MRI safe mode based at least in part on the first and second magnetic field conditions and the positional condition being detected.

Abstract: A method and system are provided for controlling an adaptive pacing therapy using an implantable medical device (IMD). The method provides electrodes that are configured to be located proximate to an atrial (A) site, left ventricular (LV) site and right ventricular (RV) site of the heart. The method utilizes one or more processors to perform obtaining an intra-atrial conduction interval (IACI-LVPROX) between an atrial event and intrinsic conduction at an LV site that is proximal to a sinoatrial (SA) node and obtaining timing of a first heart sound S1. The processors determine whether the S1 occurs after the IACI-LVPROX, and calculates an S1-conduction lag ?S1_C between the IACI-LVPROX and the first heart sound S1. The processors set an atrial-ventricular pacing (AV) delay based on the IACI-LVPROX and the ?S1_C. The processors deliver a pacing therapy based on the AV delay.

Abstract: Methods and devices are provided for managing anti-tachycardia pacing therapy delivered by an implantable medical device (IMD). The methods and devices detect events from cardiac signals sensed at electrodes of the IMD. The cardiac signals represent a ventricular tachycardia (VT) episode that includes at least a select number of VT events having a corresponding VT cycle length. The methods and devices analyze the VT cycle length to define an anti-tachycardia pacing (ATP) therapy that includes a first coupling interval and deliver a first ATP pulse that is spaced the first coupling interval after a reference refractory VT event sensed at the electrodes. The methods and devices deliver a second ATP pulse following the first ATP pulse by a non-stimulation segment that is at least one and three-quarters (1.75) times a projected VT cycle length.

Abstract: Disclosed herein is an implantable electronic device including a housing containing an electrical circuit. The implantable electronic device further includes an antenna assembly coupled to the electrical circuit. The antenna assembly includes an antenna including a dielectric antenna body within which an antenna trace is disposed. Portions of the antenna trace are disposed in offset transverse layers in a non-overlapping arrangement, thereby reducing capacitive coupling between the layers of the antenna trace. In certain implementations, the antenna assembly includes one or more capacitive features that selectively overlap portions of the antenna trace and facilitate tuning of the antenna.

Abstract: Disclosed herein is a delivery catheter for implanting a leadless biostimulator. The delivery catheter includes a shaft and a tubular body having a lumen and an atraumatic end. The atraumatic end includes at least one of a braided, woven or mesh construction configured to facilitate the atraumatic end changing diameter. When a distal portion of the shaft is coupled to a proximal region of the leadless biostimulator, at least one of distally displacing the tubular body relative to the shaft or proximally displacing the shaft relative to the tubular body causes the leadless biostimulator to be received in the volume of the atraumatic end and the atraumatic end to encompass the leadless biostimulator. Conversely, at least one of proximally displacing the tubular body relative to the shaft or distally displacing the shaft relative to the tubular body causes the leadless biostimulator to exit the volume of the atraumatic end.

Abstract: An implantable pulse generator including a header, a can, and a filtered feedthrough assembly. The header including lead connector blocks. The can coupled to the header and including a wall and an electronic substrate housed within the wall. The filtered feedthrough assembly including a flange mounted to the can and having a feedthrough port, a plurality of feedthrough wires extending through the feedthrough port, and an insulator brazed to the feedthrough port of the flange. The filtered feedthrough assembly further including a capacitor having the plurality of feedthrough wires extending there through, an insulating washer positioned between and abutting the insulator and the capacitor at least in the area of the braze joint such that the capacitor and the braze joint are non-conductive, and an electrically conductive material adhered to the capacitor and the flange for grounding of the capacitor.