Abstract: System and methods for providing a patient with arrhythmia treatment are described. For example, a system includes an arrhythmia monitoring and treatment assembly configured to be worn on the torso of the patient. The assembly has a housing discreetly extending from a skin surface of the patient. The assembly is configured to provide therapy on detecting one or more arrhythmia conditions of the patient. A first at least one user response button is disposed on the assembly at a first location on the torso concealed under clothing, and a second at least one user response button is configured to be worn on a second location of the patient's body, a location other than the torso that is accessible to the patient. The system suspends an impending therapy upon receiving a user input from either one of the first or second at least one user response buttons.

Abstract: An ambulatory medical device configured to analyze heart rates in different operating modes includes a plurality of ECG sensing electrodes, a plurality of therapy electrodes and at least one processor configured to in a default operating mode, perform a default heart rate calculation for determining a heart rate of the patient for use in detecting a cardiac arrhythmia condition of the patient. The at least one processor is configured to change a device operating mode from a default mode based on detecting patient activity to an activity operating mode, and in the activity operating mode, perform a different heart rate calculation from the default heart rate calculation for determining the heart rate for use in detecting the cardiac arrhythmia condition of the patient during the activity operating mode. The at least one processor is configured to deliver the treatment in response to detecting the cardiac arrhythmia condition.

Abstract: An ambulatory medical device is provided. The ambulatory medical device includes at least one sensor configured to acquire physiological data of a patient, at least one network interface and at least one processor coupled to the at least one sensor and the at least one network interface. The at least one processor is configured to detect, via the at least one network interface, a medical device, to establish a secure communication session with the medical device via the at least one network interface, to detect a data capacity of the secure communication session, to identify a category of patient data associated with the data capacity, and to transmit patient data of the category to the medical device via the secure communication session.

Abstract: A wearable therapeutic device includes an external defibrillator configured to monitor electrical heart activity of a patient and a garment housing a first therapy electrode and a second therapy electrode. The first and second therapy electrodes are electrically coupled to the defibrillator. The garment releasably receives a plurality of replaceable receptacles configured to store a conductive gel in locations proximate to the therapy electrodes. A plurality of gas cartridges each disposed on one of the plurality of replaceable receptacles are configured to control a release of the stored conductive gel of the associated one of the plurality of replaceable receptacles by igniting. A plurality of conductive gel firing circuits each associated with and separate from each of the plurality of replaceable receptacles are configured to be operatively coupled to the gas cartridge to control the release of the stored conductive gel upon information being communicated from the external defibrillator.

Abstract: Techniques that enable medical devices to quickly recover from loss of sensory functions are provided. In some examples, a medical device is configured to advantageously leverage differences between a first type of sensing electrode and a second type of sensing electrode that has a shorter recovery time than the first type of sensing electrode. In some examples, a medical device is configured to reference data generated by a first conditioning circuit that is configured to process signals acquired under a first set of environmental conditions and to reference data generated by a second conditioning circuit that is configured to process signal acquired under a second set of environmental conditions. In some examples, a medical device is configured to arrange electrodes used by the medical device to acquire signals in at specific locations to reduce the amount of disruptive power the electrodes encounter.

Abstract: A remote communications system for providing enhanced communication with cardiac devices includes a wearable defibrillator disposed on a torso of a patient and a remote device. The wearable defibrillator includes one or more buttons configured to be actuated by the patient to indicate that the patient is conscious, a speaker configured to communicate information to the patient, a wearable defibrillator transceiver configured to transmit the information, and a processor in communication with the speaker and the wearable defibrillator transceiver. The remote device includes a wireless transceiver for bi-directional communication configured to receive the information from the wearable defibrillator, at least one of a touch screen and a speaker, and a processor configured to cause the remote device to provide via the at least one of the touch screen and the speaker at least one of an alarm, voice message, and prompt based on the received information.

Abstract: A wearable therapeutic device includes a first therapy electrode and a second therapy electrode, each configured to be electrically coupled to an external defibrillator; and a garment configured to house the first therapy electrode and the second therapy electrode. The garment is configured to releasably receive a replaceable receptacle configured to store a conductive gel in a location proximate to at least one of the first therapy electrode and the second therapy electrode. The garment is configured to releasably receive a receptacle control unit. The receptacle control unit is separate from the replaceable receptacle. The receptacle control unit is configured to activate deployment of the stored conductive gel from the replaceable receptacle.

Abstract: A cardiac monitoring system includes cardiac sensing electrodes for external placement proximate to the patient to sense ECG signals of the patient; one or more accelerometers configured to generate patient activity data based on signals corresponding to changes in the patient's body position and movement; and a monitoring computer configured to correlate the ECG signals of the patient with the patient activity data generated from the one or more accelerometers to determine ECG signal contamination, analyze the ECG signals of the patient to extract at least heart rate data of the patient and detect a cardiac arrhythmia based at least in part on the heart rate data, and change a confidence in the detected cardiac arrhythmia based on the determined ECG signal contamination; wherein at least the patient activity data and the heart rate data are analyzed to determine a change in a physiological condition of the patient over time.

Abstract: According to at least one example, an ambulatory medical device is provided. The device includes a plurality of electrodes disposed at spaced apart positions about a patient's body and a control unit. The control unit includes a sensor interface, a memory and a processor. The sensor interface is coupled to the plurality of electrodes and configured to receive a first ECG signal from a first pairing of the plurality of electrodes and to receive a second ECG signal from a second pairing of the plurality of electrodes. The memory stores information indicating a preferred pairing, the preferred pairing being either the first pairing or the second pairing. The processor is coupled to the sensor interface and the memory and is configured to resolve conflicts between interpretations of first ECG signal and the second ECG signal in favor of the preferred pairing.

Abstract: A system and method for conservation of battery power in a portable medical device is provided. In one example, a processor arrangement includes a dual core processor having an ARM core and a DSP core. The portable medical device includes a monitor having the dual core processor, in communication with a belt node processor. The DSP core receives physiological data from the physiological sensor and sends the physiological data to the ARM core. The ARM core analyzes the physiological data to determine if a treatment sequence is necessary. The DSP core receives physiological data from the at least one physiological sensor and sends the physiological data to the ARM core, and also analyzes the physiological data to determine proper timing of the treatment sequence by the at least one therapy delivery device to synchronize at least one pulse of the treatment sequence with the physiological data.

Abstract: An ambulatory medical device comprising: a monitoring component comprising at least one sensing electrode for detecting a cardiac condition of a patient; at least one processor configured for: adjusting one or more detection parameters for detecting the cardiac condition of the patient based at least in part on at least one of 1) one or more environmental conditions and 2) input received from the monitoring component; and providing at least one of an alarm and a treatment in response to detecting the cardiac condition of the patient based on the adjusted one or more detection parameters.

Abstract: A wearable defibrillator includes a plurality of ECG electrodes configured to be removably attached to a patient and sense ECG information of the patient, and at least one therapy pad configured to deliver electrical therapy to the patient. The wearable defibrillator includes at least one audio device including a microphone configured to receive an audio input and an audio output device configured to provide an audio output. At least one processor of the wearable defibrillator is operatively connected to the plurality of ECG electrodes, the at least one therapy pad, a memory, and the at least one audio device. The at least one processor is configured to in a set up phase, receive by the microphone and store in the memory, the audio input comprising a voice recording, and cause the audio output device to provide the audio output by to playing back the voice recording to the patient.

Abstract: An ambulatory medical device includes a sensor configured to acquire a signal indicative of a physiological condition of a patient, a controller operatively coupled to the sensor and configured to monitor the physiological signal, and to perform a diagnostic test, and a remote access manager operatively coupled to the controller and configured to monitor for a command from a remote system to perform the diagnostic test, and to cause the controller to perform the diagnostic test in response to the command. In the device, the remote access manager may be further configured to transmit data representing an operational status of the ambulatory medical device to the remote system. The operational status of the controller may result from performing the diagnostic test. The remote access manager may be further configured to send the data representing the operational status of the ambulatory medical device in real time or substantially in real time.

Abstract: A wearable medical device includes a water-resistant harness, and a plurality of ECG sensing electrodes and a plurality of therapy electrodes disposed on the harness. The plurality of therapy electrodes are configured to provide at least one defibrillating biphasic shock. The device includes a control unit comprised within a waterproof case. The control unit is configured to monitor ECG information of the patient based on a sensed ECG signal, and responsive to detection of a cardiac arrhythmia, provide the at least one defibrillating biphasic shock. The device includes a water-resistant or waterproof connection pod configured to electrically couple to the plurality of ECG sensing electrodes, the plurality of therapy electrodes, and the control unit, and to provide the sensed ECG signal from the plurality of ECG sensing electrodes to the control unit and the at least one defibrillating biphasic shock from the control unit to the plurality of therapy electrodes.

Abstract: An external wearable medical device includes a plurality of electrocardiogram (ECG) sensors, at least one accelerometer configured to be disposed on a patient, and at least one processor operatively coupled plurality of ECG sensors and the at least one accelerometer. The at least one processor is configured to receive an ECG signal from the plurality of ECG sensors, receive patient activity data from the at least one accelerometer, and detect, based on the patient activity data from the at least one accelerometer, data indicative of an impending syncope event. The at least one processor is configured to issue a notification of the impending syncope event, and store in a memory during a first time period data comprising the ECG signal in association with information descriptive of impending syncope event, and transmit to a remote server during a second time period the stored data for analysis at the remote server.

Abstract: A system and method for conservation of battery power in a portable medical device is provided. In one example, a processor arrangement includes a dual core processor having an ARM core and a DSP core. The portable medical device includes a monitor having the dual core processor, in communication with a belt node processor. The DSP core receives physiological data from the physiological sensor and sends the physiological data to the ARM core. The ARM core analyzes the physiological data to determine if a treatment sequence is necessary. The DSP core receives physiological data from the at least one physiological sensor and sends the physiological data to the ARM core, and also analyzes the physiological data to determine proper timing of the treatment sequence by the at least one therapy delivery device to synchronize at least one pulse of the treatment sequence with the physiological data.

Abstract: A cardiac monitoring and treatment system includes a wearable defibrillator worn about the torso of a patient and a remote device configured to communicate with the wearable defibrillator. The wearable defibrillator includes one or more buttons configured to be actuated by the patient to cause the wearable defibrillator to withhold an imminent delivery of a therapy necessitated by a detected cardiac arrhythmia. The remote device includes a touch screen including one or more remote response buttons accessible by the patient to respond to a notification of the imminent delivery of the therapy necessitated by the detected cardiac arrhythmia. Actuation of either the one or more remote response buttons of the remote device or the one or more buttons of the wearable defibrillator causes the wearable defibrillator to withhold the imminent delivery of the therapy necessitated by the detected cardiac arrhythmia.

Abstract: An arrhythmia monitoring device includes a plurality of pairs of ECG sensing electrodes disposed in a garment configured to be worn about a torso of a patient, and signal acquisition circuit configured to be electrically coupled to the plurality pairs of ECG sensing electrodes. The device includes a processor in communication with the signal acquisition circuit configured to execute a selection process comprising identifying a quality of each of a plurality of ECG signals, ranking the signals based on the identified quality, and selecting at least two ECG signals to monitor having highest quality. The processor is configured to re-execute the selection process following an event including at least one of the garment shifting on the torso, the garment being repositioned on the torso, and the garment being removed and returned to the torso of the patient, and monitor the selected at least two ECG signals for a cardiac arrhythmia.

Abstract: A wearable medical system includes a wearable defibrillator device. The device includes a water-resistant/waterproof harness to be continuously or nearly continuously worn by a patient; a plurality of ECG sensing electrodes configured to monitor an ECG of the patient; a plurality of therapy electrodes configured to deliver one or more therapeutic pulses of energy to the patient; and a control unit configured to receive the monitored ECG of the patient, and responsive to the detection of a cardiac arrhythmia, provide the one or more therapeutic pulses to the patient via at least one of the plurality of therapy electrodes if the patient does not indicate that the patient is conscious. The system includes a hand-held user interface device configured to wirelessly communicate with the control unit; the interface device includes at least one patient responsiveness button by which the patient can indicate that the patient is conscious.

Abstract: According to some embodiments, a wearable medical device capable of treating a patient presenting with syncope is provided. The wearable medical device includes a memory storing event profile information, a battery, at least one treatment electrode coupled to the battery, at least one processor coupled to the memory and the at least one treatment electrode, and an event manager executed by the at least one processor. The event manager is configured to detect an event associated with syncope; store, in the memory, data descriptive of the event in association with an indication that the data includes data descriptive of a syncopal event; and address the event.