A medical device is configured to deliver therapeutic electrical stimulation pulses by generating frequency modulated electrical stimulation pulse signals. The medical device includes a pulse signal source and a modulator. The pulse signal source generates an electrical stimulation pulse signal having a pulse width. The modulator may include a high frequency modulator configured to modulate a frequency of the pulse signal from a starting frequency down to a minimum frequency during the pulse width. The modulator may include a low frequency bias generator to modulate the offset of the pulse signal between a minimum offset and a maximum offset in other examples.

System, methods and devices are provided for identifying a failure state of a charge storage device. The system includes a charge storage device within an implantable medical device. An energy supply is configured to charge the charge storage device during a charging operation. A monitoring circuit is coupled to the charge storage device and is configured to collect voltage level measurements across the charge storage device at multiple points in time during the charging operation. Responsive to execution of program instructions, a processor collects the voltage level measurements across the charge storage device. The charge storage device exhibits a charge profile in which a voltage level across the charge storage device changes over the charging operation. The processor analyzes the voltage level measurements to identify a failure signature in the charge profile and generates an output indicative of a failure state for the charge storage device based on the analysis.

Systems and methods related to the field of cardiac resuscitation, and in particular to devices for assisting rescuers in performing cardio-pulmonary resuscitation (CPR).

The disclosure describes various aspects of an automated external defibrillator (AED) system, including shock generating electronics, a battery configured for providing power to the shock generating electronics, power management circuitry configured for managing the shock generating electronics and the battery, at least one environmental sensor configured for monitoring environmental conditions in which the AED system is placed, and a controller configured for controlling the power management circuitry and the at least one environmental sensor. The at least one environmental sensor includes a temperature sensor configured for providing a temperature measurement, and the controller is further configured for adjusting operations of the power management circuitry in accordance with the temperature measurement provided by the temperature sensor. The disclosure further describes associated methods of using the AED system.

A medical device that includes a power source, a therapy delivery interface, therapy electrodes, electrocardiogram (ECG) sensing electrodes to sense ECG signal of a heart of a patient, a sensor interface to receive and digitize the ECG signal, and a processor. The processor is configured to analyze the ECG signal to determine a cardiac rhythm and a transform value representing a magnitude of a frequency component of the cardiac rhythm, analyze the cardiac rhythm and the transform value to detect a shockable cardiac arrhythmia by classifying the cardiac rhythm as a noise rhythm or a shockable cardiac arrhythmia rhythm based on the transform value, and causing the processor to detect the cardiac arrhythmia if classifying the cardiac rhythm as a shockable cardiac arrhythmia rhythm, initiate a treatment alarm sequence, adjust the shock delivery parameter for a defibrillation shock, and provide the defibrillation shock via the therapy electrodes.

The disclosure describes various aspects of an automated external defibrillator (AED) system, including shock generating electronics, a battery configured for providing power to the shock generating electronics, power management circuitry configured for managing the shock generating electronics and the battery, at least one environmental sensor configured for monitoring environmental conditions in which the AED system is placed, and a controller configured for controlling the power management circuitry and the at least one environmental sensor. The at least one environmental sensor includes a temperature sensor configured for providing a temperature measurement, and the controller is further configured for adjusting operations of the power management circuitry in accordance with the temperature measurement provided by the temperature sensor. The disclosure further describes associated methods of using the AED system.

A method and a device for defibrillation. When a shock is generated, energy is transmitted from the low-voltage range to a high-voltage range, at least one current surge being generated in the low-voltage range, stepped up to the high-voltage range and guided to electrodes. An energy supply, power electronics and an energy storage device are used in the low-voltage range.

Wearable, automatic external, and implantable defibrillators, as well as methods of operation in such systems, are disclosed with shock delivery mitigations to avoid delivering a defibrillation shock on a T-wave. Prior to issuance of a defibrillation shock, one or more detected cardiac events are analyzed to characterize a detected event that is sensed for purposes of synchronizing the defibrillation shock. The detected event can be characterized as an R-wave or a T-wave, and the shock delivery protocol is then selected based on the characterization of the detected event to avoid shock-on-T and potential pro-arrhythmia.

The disclosure describes various aspects of an automated external defibrillator (AED) system, including shock generating electronics, a battery configured for providing power to the shock generating electronics, power management circuitry configured for managing the shock generating electronics and the battery, at least one environmental sensor configured for monitoring environmental conditions in which the AED system is placed, and a controller configured for controlling the power management circuitry and the at least one environmental sensor. The at least one environmental sensor includes a temperature sensor configured for providing a temperature measurement, and the controller is further configured for adjusting operations of the power management circuitry in accordance with the temperature measurement provided by the temperature sensor. The disclosure further describes associated methods of using the AED system.

The present invention relates to a device, and software and methodology associated with a portable Automated External Defibrillator (“AED”). The portable AED works with a mobile device and software, and includes two or more cardiac pads, a battery pack, and specialized capacitor. When connected to a patient in cardiac arrest, the AED contacts Emergency Medical Services, and records patient information to be transmitted for evaluation by medical providers. The AED is able to analyze cardiac rhythms, suggests administering one or more shocks to the patient in appropriate cardiac arrhythmia, and guides a user on proper CPR technique, if enabled. The AED software can alert other personnel via a mobile device app.