The problem of a potentially high amount of supra-threshold charge passing through the patient's tissue at the end of an Implantable Pulse Generator (IPG) program is addressed by circuitry that periodically dissipates only small amount of the charge stored on capacitances (e.g., DC-blocking capacitors) during a pulsed post-program recovery period. This occurs by periodically activating control signals to turn on passive recovery switches to form a series of discharge pulses each dissipating a sub-threshold amount of charge. Such periodic pulsed dissipation may extend the duration of post-program recovery, but is not likely to be noticeable by the patient when the programming in the IPG changes from a first to a second program. Periodic pulsed dissipation of charge may also be used during a program, such as between stimulation pulses.

An implantable pulse generator (IPG) is disclosed having a plurality of electrode nodes, each electrode node configured to be coupled to an electrode to provide stimulation pulses to a patient's tissue. The IPG includes a digital-to-analog converter configured to amplify a reference current to a first current specified by first control signals; a first resistance configured to receive the first current, wherein a voltage across the first resistance is held to a reference voltage at a first node; a plurality of branches each comprising a second resistance and configured to produce a branch current, wherein a voltage across each second resistance is held to the reference voltage at second nodes; and a switch matrix configurable to selectively couple any branch current to any of the electrode nodes via the second nodes.

A bilateral hearing implant system has a left side and a right side. There is an interaural time delay (ITD) processing module on each side that adjusts ITD characteristics of the stimulation signals based on defined groups of stimulation channels that include: i. an apical channel group on each side corresponding to a lowest range of audio frequencies up to a common apical channel group upper frequency limit, wherein a common number of one or more stimulation channels is assigned to each apical channel group, and wherein corresponding apical channel group stimulation channels on each side have matching bands of audio frequencies, and ii. one or more basal channel groups on each side corresponding to higher range audio frequencies above the apical channel group upper frequency limit.

Systems and methods are provided for optimizing hemodynamics within a patient's heart, e.g., to improve the patient's exercise capacity. In one embodiment, a system is configured to be implanted in a patient's body to monitor and/or treat the patient that includes at least one sensor configured to provide sensor data that corresponds to a blood pressure within or near the patient's heart; at least one component designed to cause dyssynchrony of the right ventricle, and a controller configured for adjusting the function of the at least one component based at least in part on sensor data from the at least one sensor.

Methods and systems for terminating a pacemaker mediated tachycardia (PMT) are described herein. During a period that a PMT is not detected, an implantable system delivers an atrial pacing pulse to an atrial cardiac chamber in response to a PA interval expiring without an intrinsic atrial event being detected during the PA interval. The systems performs atrial sensing to thereby monitor for intrinsic atrial events in the atrial cardiac chamber, performs ventricular sensing to thereby monitor for intrinsic ventricular events in a ventricular cardiac chamber, and detects the PMT. Additionally, the system, in response to the PMT being detected, initiates a PMT PA interval that is shorter than the PA interval that the system would otherwise use for atrial pacing if the PMT was not detected.

Embodiments described herein relate to implantable medical devices (IMDs) and methods for use therewith. Such a method includes using an accelerometer of an IMD (e.g., a leadless pacemaker) to produce one or more accelerometer outputs indicative of the orientation of the IMD. The method can also include the IMD using an accelerometer to identify when the orientation of the IMD is such that the IMD will likely be able to successfully communicate with another IMD via one or more communication pulses sent from the IMD to the other IMD. The method also includes the IMD sending of the one or more communication pulses, that are used to communicate with the other IMD, when the orientation of the IMD is such that the IMD will likely be able to successfully communicate with the other IMD via one or more communication pulses sent from the IMD to the other IMD.

The embodiments described herein relate to a self-positioning, quick-deployment low profile transvenous electrode system for sequentially pacing both the atrium and ventricle of the heart in the “dual chamber” mode, and methods for deploying the same.

The invention relates to a telemetry communication system for an implantable medical device (1) comprising a radiofrequency transceiver, comprising: a remote controller (2) adapted to be used by a patient into whom said medical device (1) is implanted, said remote controller comprising a radiofrequency transceiver configured to communicate with said implantable medical device in a first frequency band (RF1), the transceiver of the remote controller (2) being paired with the transceiver of the implantable medical device (1), a programming device (3) said implantable medical device adapted to be used by a practitioner, comprising a user interface (30), and configured to communicate with the remote controller (2) through a wire connection or a wireless connection in a second frequency band (RF2) different from the first frequency band, the programming device (3) being configured to, when said connection is established between the remote controller (2) and the programming device (3), establish a communication between the implantable medical device and the programming device through the remote controller.

Wirelessly networked systems of implantable and non-implantable medical devices with networking protocols, software, and hardware that allow for communications and energy transfer between different the medical devices (free standing, implants and wearables) using ultrasonic waves. The networks and methods of use are used to construct cardiac pacing, deep brain stimulation, and neurostimulation networks based on ultrasonic wide band technology.

A method of applying electrode elements configured in an array of elements to an individual's skin, the electrode elements being part of an apparatus for delivering a plurality of electromagnetic fields to the body of the individual, the method comprising the steps of: positioning, applying, holding and bowing. The positioning step includes the positioning of each of the electrode elements of the array of elements into corresponding cavities in at least one holding rack. The applying step includes the applying of a medical adhesive to a surface of the plurality of electrode elements. The holding step includes the holding of the holding rack against the skin at a selected location. The bowing step includes the bowing of a portion of the holding rack causing one of the electrode elements to pop out of the holding rack, with the electrode element adhering to the skin by way of the medical adhesive.