Systems and methods involve an intrathoracic cardiac stimulation device operable to provide autonomous cardiac sensing and energy delivery. The cardiac stimulation device includes a housing configured for intrathoracic placement relative to a patient's heart. A fixation arrangement of the housing is configured to affix the housing at an implant location within cardiac tissue or cardiac vasculature. An electrode arrangement supported by the housing is configured to sense cardiac activity and deliver stimulation energy to the cardiac tissue or cardiac vasculature. Energy delivery circuitry in the housing is coupled to the electrode arrangement. Detection circuitry is provided in the housing and coupled to the electrode arrangement. Communications circuitry may optionally be supported by the housing. A controller in the housing coordinates delivery of energy to the cardiac tissue or cardiac vasculature in accordance with an energy delivery protocol appropriate for the implant location.

A pulse generator that includes a communications module is disclosed herein. The communication module includes a transceiver and an antenna circuit. The antenna circuit includes a first pathway having a capacitor and a second, parallel pathway including a capacitor, and a resistor, and a radiating element arranged in series. The antenna circuit is tuned to have a resonant frequency corresponding to a desired transmission frequency and a bandwidth corresponding to shifts in the resonant frequency arising from the implantation of the antenna.

Systems and methods for cardiac pacing during a procedure are disclosed and may include an external pulse generator (EPG) for connecting to a lead. A remote-control module (RCM) wirelessly connected to the EPG may include user inputs to control the EPG. A central processing unit (CPU) with a memory unit for storing code and a processor for executing the code may be included where the CPU is connected to the EPG and RCM. The code may control the EPG in response to user input from the RCM. The CPU may be disposed in the EPG or the RCM, or an interface module (IM) configured to communicate between an otherwise conventional EPG and the RCM. The executable code may perform a continuity test (CT) routine, a capture check (CC) routine, rapid pacing (RP) routine, and/or a back-up pacing (BP) routine, in response to user input from the RCM.

Provided is a medical apparatus for a patient comprising an external system and an implantable system. The external system can be configured to transmit one or more transmission signals, each transmission signal comprising at least power or data. The implantable system can be configured to receive the one or more transmission signals from the external system. The external system comprises a first external device comprising at least one external antenna configured to transmit a first transmission signal to the implantable system. The implantable system comprises a first implantable device comprising at least one implantable antenna configured to receive the first transmission signal from the first external device. At least one of the external antenna or implantable antenna comprises an antenna assembly comprising: at least one transmitting/receiving antenna; and at least one shielding element positioned between the at least one transmitting/receiving antenna and an interfering component.

Techniques are disclosed for adjusting sub-perception stimulation applied to a patient by an Implantable Pulse Generator (IPG). Adjustment can occur through use of one or more modulation functions associated with a stimulation modulation algorithm that adjusts the total charge provided by the stimulation to the patient as a function of time. The modulation function and algorithm can adjust the charge either by duty cycling the stimulation, or by adjusting the sub-perception stimulation parameters, and such adjustment can occur in the IPG or an external device. The stimulation modulation algorithm may use one or more models when adjusting the stimulation parameters to keep them at optimal values for sub-perception stimulation while simultaneous adjusting the charge stimulation provided as prescribed by the modulation function.

The present disclosure provides an electrical stimulation device. The electrical stimulation device includes a signal receiving circuit and a signal processing circuit. The signal receiving circuit receives and outputs a frequency signal. The signal processing circuit receives the frequency signal and provides an electrical stimulation signal according to the frequency signal.

An electrical stimulation device includes a signal receiving circuit, a rectifying circuit and a signal processing circuit. The signal receiving circuit receives and outputs a frequency signal. The rectifying circuit receives the frequency signal and rectifies the frequency signal to generate a rectifying signal. The signal processing circuit receives the rectifying signal to generate an electrical stimulation signal.

An advertising algorithm is disclosed which operates in an Implantable Medical Device (IMD) to adjust an interval at which the IMD will transmit advertising data packets to an external device able to connect with the IMD. When a communication session between the IMD and an external device is terminated, the advertising algorithm will issue advertising data packets at a higher rate for a set duration. This will allow the external device to connect more quickly with the IMD in a next communication session. After the set duration, when it may be assumed that the external device is less likely to connect with the IMD, the algorithm reduces that rate at which advertising data packets are issued, which saves power in the IMD.

A method of treating a patient, comprising: sensing a biological parameter indicative of respiration; analyzing the biological parameter to identify a respiratory cycle; identifying an inspiratory phase of the respiratory cycle; and delivering stimulation to a hypoglossal nerve of the patient, wherein stimulation is delivered if a duration of the inspiratory phase of the respiratory cycle is greater than a predetermined portion of a duration of the entire respiratory cycle.

A headpiece including a housing, a headpiece magnet carried by the housing, and a headpiece antenna carried by the housing.