Abstract: An implantable medical device (IMD) with a receiver having a higher power mode and a lower power mode. In the higher power mode, the receiver can receive a communication from an external device and pass the received communication to a controller, and in the lower power mode the receiver may not receive the communication from the external device and pass the received communication to the controller. In some cases, the IMD may include a physiological sensor providing an output to the controller, and the controller may control whether the receiver is in the higher power mode or the lower power mode based at least in part on the output of the physiological sensor.

Abstract: Systems, methods, and devices for determining occurrences of a tamponade condition are disclosed. One exemplary method includes monitoring an accelerometer signal of a leadless cardiac pacemaker attached to a heart wall, determining if a tamponade condition of the patient's heart is indicated based at least in part on the monitored accelerometer signal, and in response to determining that the tamponade condition is indicated, providing a notification of the tamponade condition for use by a physician to take corrective action.

Abstract: Systems, devices, and methods for determining occurrences of myocardial infarctions are disclosed. In one embodiment, a method of sensing for an occurrence of a myocardial infarction may include sensing a baseline accelerometer signal during a baseline, determining a baseline template based on one or more characteristics of the baseline accelerometer signal, and storing the baseline template in a memory. The method may further include sensing an accelerometer signal during a test period subsequent to the baseline, determining a test template based on one or more characteristics of the accelerometer signal during the test period, and comparing the baseline template with the test template, and based on the comparison, determining if a myocardial infarction occurred in the patient's heart. If it is determined that a myocardial infarction occurred in the patient's heart, the method may further include displaying an indication on a display that a myocardial infarction occurred.

Abstract: Methods and devices for testing and configuring implantable medical device systems. A first medical device and a second medical device communicate with one another using test signals configured to provide data related to the quality of the communication signal to facilitate optimization of the communication approach. Some methods may be performed during surgery to implant one of the medical devices to ensure adequate communication availability.

Abstract: An implantable medical device for implantation into a patient may include a housing, a pulse generation circuit disposed at least partially within the housing, a plurality of electrodes electrically coupled to the pulse generation circuit, the plurality of electrodes being exposed external to the housing, and a controller operatively coupled to the pulse generation circuit. The controller may be configured to command the pulse generation circuit to deliver a phasic conducted communication pulse via at least two of the plurality of electrodes. Additionally, the phasic conducted communication pulse may comprise a first phase having a first polarity followed by a second phase having an opposite second polarity, wherein the second phase may have a duration of less than 60 microseconds, and wherein the first phase having may have a duration of between five percent and eighty percent of the duration of the second phase.

Abstract: Systems, methods, and devices for detecting dislodgment of an implantable device are disclosed. In one example, a method for determining a dislodgement status may comprise collecting, by the implantable device operating in a first operating mode, a first number of accelerometer signal samples during a cardiac cycle of the heart and using the first number of accelerometer signal samples to determine a first patient parameter and collecting, by the implantable device operating in a second operating mode, a second number of accelerometer signal samples during a cardiac cycle of the heart and using the second number of accelerometer signal samples to determine a dislodgment status of the implantable device, wherein the first number is smaller than the second number. In some further embodiments, the method may further include providing a notification of the dislodgment status to a remote device that is remote from the implantable medical device.

Abstract: An implantable leadless cardiac pacing device including a housing having a proximal end and a distal end, an electrode positioned proximate the distal end of the housing configured to be positioned adjacent cardiac tissue, and a tissue anchoring member extending from the distal end of the housing configured to secure the housing to cardiac tissue. The device further includes a tissue engagement verification feature configured to provide feedback upon engagement of the tissue anchoring member in cardiac tissue.

Abstract: Systems, methods, and devices for determining occurrences of a tamponade condition are disclosed. One exemplary method includes monitoring an accelerometer signal of a leadless cardiac pacemaker attached to a heart wall, determining if a tamponade condition of the patient's heart is indicated based at least in part on the monitored accelerometer signal, and in response to determining that the tamponade condition is indicated, providing a notification of the tamponade condition for use by a physician to take corrective action.

Abstract: Systems, devices, and methods for adjusting functionality of an implantable medical device based on posture are disclosed. In some instances, a method for operating a leadless cardiac pacemaker implanted into a patient, where the patient has two or more predefined behavioral states, may include detecting a change in the behavioral state of the patient, and in response, changing a sampling rate of a sensor signal generated by a sensor of the leadless cardiac pacemaker. In some embodiments, the method may further include using the sampled sensor signal to determine an updated pacing rate of the leadless cardiac pacemaker and providing pacing to the patient at the updated pacing rate.

Abstract: An implantable medical device includes a housing. A first ID tag is secured relative to the housing at a first position and defines a first radiopaque manufacturer code section that visually identifies a manufacturer of the implantable medical device. A second ID tag is secured relative to the housing at a second position that is offset from the first position in at least one dimension. The second ID tag defines a second radiopaque manufacturer code section that also visually identifies the manufacturer of the implantable medical device.

Abstract: An implantable medical device has a housing with a fixation element disposed adjacent a first end of the housing and a retrieval element disposed adjacent a second end of the housing. An outer housing surface includes a first region having a first surface texture with a first average surface roughness and a second region having a second surface texture with a second average surface roughness that is different from the first average surface roughness. An insulative layer includes a first region overlying the first surface texture and a second region overlying the second surface texture, wherein an outer surface of the insulative layer emulates the first surface texture in the first region of the insulative layer and emulates the second surface texture in the second region of the insulative layer.

Abstract: Systems, methods, and devices for detecting or confirming fibrillation are discussed. In one example, a method for detecting a cardiac arrhythmia of a patients' heart comprises receiving, by a leadless cardiac pacemaker fixed in the patients' heart, an indication from a remote device that a cardiac arrhythmia is detected, monitoring by the leadless cardiac pacemaker a signal generated by a sensor that is located within the patients' heart, and based at least in part on the monitored signal, confirming whether a cardiac arrhythmia is occurring or not. In some embodiments, the method may further comprise, if a cardiac arrhythmia is confirmed, delivering a therapy to treat the cardiac arrhythmia.

Abstract: Implantable medical devices (IMD) such as a cardiac pacemakers may include a sensor and electrodes. In some cases, the IMD may include electronics to use the sensor to determine the heart rate of a patient's heart. The electronics may use the electrodes to deliver pacing pulses to the heart at a first energy level if the heart rate is below a threshold and pace the heart at an enhanced energy level if the heart rate is above the threshold.

Abstract: An implantable leadless cardiac pacing device including a housing having a proximal end and a distal end, an electrode positioned proximate the distal end of the housing configured to be positioned adjacent cardiac tissue, and a tissue anchoring member extending from the distal end of the housing configured to secure the housing to cardiac tissue. The device further includes a tissue engagement verification feature configured to provide feedback upon engagement of the tissue anchoring member in cardiac tissue.

Abstract: Methods and devices for treating a lung are disclosed. The method may include deploying a catheter into a blood vessel directing blood towards a portion of the lung, and discharging a media into the blood vessel through the catheter, the media may be configured to at least partially block the flow of blood within the portion of the lung.

Abstract: An implantable medical device includes a housing. A first ID tag is secured relative to the housing at a first position and defines a first radiopaque manufacturer code section that visually identifies a manufacturer of the implantable medical device. A second ID tag is secured relative to the housing at a second position that is offset from the first position in at least one dimension. The second ID tag defines a second radiopaque manufacturer code section that also visually identifies the manufacturer of the implantable medical device.

Abstract: Delivery devices, systems, and methods for delivering implantable leadless pacing devices are disclosed. An example delivery device may an outer tubular member and an inner tubular member slidably disposed within the lumen of the outer tubular member. A distal holding section may extend distally of a distal end of the inner tubular member and define a cavity therein for receiving an implantable leadless pacing device. The device may further include a hub portion including at least a first hub portion affixed adjacent to the proximal end of the outer tubular member and a second hub portion affixed adjacent to the proximal end of the inner tubular member. A first locking mechanism configured to releasably couple the outer tubular member and the inner tubular member may be disposed within the hub portion.

Abstract: One aspect provides a capacitor feedthrough assembly having an electrically conductive member dimensioned to extend at least partially through a feedthrough hole of a case of the capacitor, the conductive member having a passage therethrough.

Abstract: An implantable leadless pacing device may comprise a power source and circuitry operatively coupled to the power source. The circuitry configured to pace a patient's heart and/or sense electrical activity of the patient's heart. A housing may at least partially enclose the circuitry. The pacing device may further include a first electrode secured relative to the housing and a fixation mechanism secured relative to the housing. The fixation mechanism may comprise a plurality of tines configured to move between an elongated delivery configuration and a curved deployed configuration. Each tine of the plurality of tines may include a radiopaque material.

Abstract: Catheter and implantable leadless pacing devices, systems, and methods utilizing catheters and implantable leadless pacing devices are disclosed. An example catheter system may include a holding structure extending distally from a tubular member. An implantable device, such a leadless pacing device, may be located within a cavity of the holding structure and an electrical barrier may be located within the holding structure at a location between a proximal electrode and a distal electrode of the implantable device. The electrical barrier may inhibit electrical signals of the implantable device from traveling within the holding structure between the proximal electrode and the distal electrode of the implantable device. The holding structure may include one or more electrical ports adjacent the proximal end of the holding structure and adjacent or proximal of the proximal electrode of the implantable device.