An example method is performed by a current defibrillator and includes determining that a memory embedded within a therapy cable coupled to the current defibrillator stores data indicative of a previous shock delivered to a patient, the previous being delivered using a previous defibrillator. The method also includes obtaining the data indicative of the previous shock, and setting an energy level for a subsequent shock based on the data indicative of the previous shock. The method further includes delivering the subsequent shock to the patient at the energy level for the subsequent shock.

A system and method are provided. The system includes a HIS electrode configured to be located proximate to a HIS bundle. A pulse generator is coupled to the HIS electrode and is configured to deliver HIS bundle pacing (HBP), a right atrial (RA) electrode is located in a right atrium, a sensing circuitry coupled to the RA electrode and defines an RA sensing channel that does not utilize the HIS electrode. The system includes a memory including program instructions. The system includes a processor is configured to collect cardiac activity (CA) signals over the RA sensing channel utilizing the RA electrode. The CA signals include a far field (FF) component associated with a ventricular event (VE). The processor analyzes the FF component to identify first and second FF component (FFC) characteristics of interest (COI) of the ventricular event and utilizes the first FFC COI to apply a first capture class (CC) discriminator to distinguish between first and second capture classes. The first capture class includes first and second capture types. The processor utilizes the second FFC COI to apply a second CC discriminator to distinguish between at least one of i) the first and second capture types within the first capture class, or ii) third and fourth capture classes and manages HIS bundle pacing based on distinctions by the first and second CC discriminators.

An electrode test system of a defibrillator including electrodes in a face-to-face test arrangement forming a capacitor, an impedance measurement signal generator connected to the electrodes and configured to send an ac signal to the electrodes, an impedance measurement signal processor connected to the electrodes which is placeable in an electrode test state and configured to receive an electrode test ac signal from the electrodes and process the electrode test ac signal to obtain a processed electrode test ac signal, a defibrillator processor connected to the impedance measurement signal generator and the impedance measurement signal processor configured to place the impedance measurement signal processor in the electrode test state and to receive the processed electrode test ac signal, analyze the processed electrode test ac signal to obtain an electrode test impedance signal and analyze the electrode test impedance signal to determine a pass condition or a fail condition of the electrodes.

A wearable cardioverter defibrillator (“WCD”) latching connector system includes a receptacle positioned within a WCD monitor, and a connector configured to removably engage the receptacle.

Improved devices, circuits and methods of operation in implantable stimulus systems. An implantable defibrillator may comprise an H-bridge output circuit having low and high sides, with a current controlling circuit coupled to the high side of the H-bridge output circuit and a current monitoring circuit coupled to the low side of the H-bridge output circuit. A bootstrap design or a DC isolating circuit or circuit element may be used in the current controlling circuit.

An example method is performed by a current defibrillator and includes determining that a memory embedded within a therapy cable coupled to the current defibrillator stores data indicative of a previous shock delivered to a patient, the previous being delivered using a previous defibrillator. The method also includes obtaining the data indicative of the previous shock, and setting an energy level for a subsequent shock based on the data indicative of the previous shock. The method further includes delivering the subsequent shock to the patient at the energy level for the subsequent shock.

An apparatus may be configured for providing feedback to caregivers during a code blue scenario when adhered to the chest of a subject undergoing resuscitation by sensing and transmitting information associated with the code blue scenario. Such information may include one or more of vital signs of the subject during resuscitation, information associated with chest movements of the subject during resuscitation, and audio information from an environment of the subject during resuscitation. One or more processors may generate real-time feedback for communication to the caregivers during the code blue scenario based on the sensed and transmitted information.

A system includes a signal generator, configured to pass a generated signal, which has two different generated frequencies, through a circuit including a bidirectional semiconductor device. The system further includes a processor, configured to identify, while the generated signal is passed through the circuit, a derived frequency, which derives from the generated frequencies, on the circuit, and to generate, in response to identifying the derived frequency, an output indicating that a property of the bidirectional semiconductor device is asymmetric. Other embodiments are also described.

Systems and methods related to the field of cardiac resuscitation, and in particular to devices for assisting rescuers in performing cardio-pulmonary resuscitation (CPR) are described herein. The system includes a camera to capture one or more images at a scene where the person in need of medical assistance is being treated and one or more processors. The processors receive and process the images, by using a rescuer profile, to provide a real-time feedback to the rescuer to improve the CPR treatment.

In some examples, a system can be used for delivering cardiac resynchronization therapy (CRT). The system may include a pacing device configured to be implanted within a patient. The pacing device can include a plurality of electrodes, signal generation circuitry configured to deliver ventricular pacing via the plurality of electrodes, and a sensor configured to produce a signal that indicates mechanical activity of the heart. Processing circuitry can be configured to identify one or more features of a cardiac contraction within the signal, and determine whether the contraction was a fusion beat based on the one or more features.