Abstract: Disclosed is a wearable medical device comprising a harness configured to be worn about a torso of a subject, a therapy electrode assembly configured to be attached to the harness, and a multi-channel accelerometer coupled to the therapy electrode assembly, the multi-channel accelerometer configured to provide signals indicative of heart sounds of the subject on at least one channel, and to provide signals indicative of one or more of respiration, position, and activity level of the subject on another channel different from the at least one channel. The wearable medical device is configured to transmit at least data regarding the heart sounds to an external system for processing and analysis.

Abstract: According to at least one aspect, a medical device is provided. The medical device includes at least one electrode to sense an electrocardiogram (ECG) signal of a patient and a controller coupled to the at least one electrode. The controller may be configured to generate a first ECG template based on a first ECG signal of the patient, generate a second ECG template based on a second ECG signal of the patient, and determine whether the patient is experiencing a cardiac event based on the ECG signal of the patient and an identified one of the first ECG template and the second ECG template.

Abstract: Disclosed is a wearable cardiac therapeutic system including a plurality of therapy electrodes disposed in a garment and a fluid pressure source including a barrel configured to house conductive gel, and an actuation mechanism. A therapy controller is configured to detect an arrhythmic event in a patient based on sensed electrical activity of the patient's heart, initiate an activation signal indicating that the conductive gel is to be released on to the body of the patient, and cause the delivery of one or more electrical therapeutic shocks to the heart of the patient. Gel activator circuitry is configured to receive the activation signal from the therapy controller, and cause the fluid pressure source to expel the conductive gel onto the body of the patient proximate the one or more of the therapy electrodes and prior to the delivery of the one or more electrical shocks to the patient.

Abstract: An ambulatory medical device configured to be worn on a patient's body includes at least one electrocardiogram (ECG) electrode configured to sense cardiac activity, at least one acoustic sensor configured to detect one or more heart sounds, and at least one processor. The at least one processor is configured to implement a cardiopulmonary function analyzer to detect a suspected tachyarrhythmia based on an analysis of ECG signal(s) and verify the suspected tachyarrhythmia as a ventricular tachycardia (VT) event by analyzing acoustic signal(s) to distinguish the VT event from a supraventricular tachycardia (SVT) event. Said analysis includes determining an intensity and/or a beat-to-beat variability of a first heart sound (S1). The at least one processor verifies the suspected tachyarrhythmia as the VT event when the intensity of the S1 sound is below a predetermined intensity threshold or when the beat-to-beat variability of the S1 sound is above a predetermined variability threshold.

Abstract: An ambulatory medical device capable of delivering therapy to a patient includes at least one sensor, at least one treatment element, and at least one response mechanism having first and second states and configured to be actuated by the patient. The device also includes a controller including at least one processor configured to detect a value indicative of a health disorder, request that the patient change a state of the response mechanism(s) from the first to second state within a first predetermined period of time, delay the therapy, monitor the response mechanism(s)' state for a second predetermined period of time and request that the patient change the response mechanism(s) from the second to first state, and further delay the therapy in response to detection of a change in the response mechanism(s)' state or prepare to deliver the therapy to the patient in response to the response mechanism(s)' state not changing.

Abstract: In one example, an ambulatory medical device is provided. The ambulatory medical device includes a plurality of subsystems, at least one sensor configured to acquire data descriptive of a patient, a user interface and at least one processor coupled to the at least one sensor and the user interface. The at least one processor is configured to identify subsystem status information descriptive of an operational status of each subsystem of the plurality of subsystems and to provide a device health report for the ambulatory medical device via the user interface, the device health report being based on the operational status of each subsystem.

Abstract: Disclosed is a wearable cardiac therapeutic system including a plurality of therapy electrodes disposed in a garment and a fluid pressure source including a barrel configured to house the conductive gel and an actuation mechanism. A therapy controller is configured to detect an arrhythmic event in a patient based on sensed electrical activity of the patient's heart, initiate an activation signal indicating that the conductive gel is to be released on to the body of the patient, and cause the delivery of one or more electrical therapeutic shocks to the heart of the patient. Gel activator circuitry is configured to receive the activation signal from the therapy controller, and cause the fluid pressure source to expel the conductive gel onto the body of the patient proximate the one or more of the therapy electrodes and prior to the delivery of the one or more electrical shocks to the patient.

Abstract: An ambulatory medical device capable of delivering therapy to a patient is provided. The ambulatory medical device comprises at least one controller operatively connected to at least one sensor configured to detect a health disorder of the patient, at least one treatment element configured to deliver therapy to the patient, and at least one response mechanism configured to be actuated by the patient, the at least one response mechanism having one of a first state and a second state. The at least one controller being configured to delay delivery of the therapy to patient for a first predetermined period of time responsive to detection of the health disorder and the at least one response mechanism having the first state, and to deliver the therapy to the patient in response to continued detection of the health disorder, the at least one response mechanism remaining in the first state.

Abstract: An external medical device is provided which is configured to provide a user with access to one or more training modules. The external medical device includes one or more electrodes configured to detect a cardiac activity of a patient, an audio and/or visual output, and a controller coupled to the audio and/or visual output. The controller is configured to: detect at least one of a predetermined event and a device use pattern; and responsive to detecting the at least one of the predetermined event and the device use pattern, provide the patient access to one or more training modules relating to a use or a configuration of the external medical device via the audio and/or visual output. The device can also include a user interface configured to provide access to at least one training module according to a schedule of training modules for the patient.

Abstract: A medical device is disclosed that includes one or more treatment electrodes, one or more sensors, and one or more controllers connected to the one or more treatment electrodes and one or more sensors. The medical device also includes one or more response mechanisms connected to the one or more controllers. The one or more controllers are configured to receive input from the one or more response mechanism and are also configured to determine whether a patient wearing the medical device actuated the one or more response mechanisms based, at least in part, on the input received from the one or more response mechanisms. In some disclosed embodiments, the medical device is a wearable defibrillator.

Abstract: In at least one example, a medical device is provided. The medical device includes at least one therapy electrode, at least one electrocardiogram (ECG) electrode, at least one acoustic sensor, and at least one processor coupled with the at least one acoustic sensor, the at least one ECG electrode, and the at least one therapy electrode. The at least one processor can receive at least one acoustic signal from the at least one acoustic sensor, receive at least one electrode signal from the ECG electrode, detect at least one unverified cardiopulmonary anomaly using the at least one electrode signal, and verify the at least one unverified cardiopulmonary anomaly with reference to data descriptive of the at least one acoustic signal.

Abstract: A wearable defibrillator is configured to be ambulatory and move with a patient and further configured to receive and provide custom prompts. The wearable defibrillator includes a garment, sensing electrodes configured to sense the patient's ECG, therapy electrodes configured to deliver therapeutic defibrillating shocks to the patient, and an external medical device controller electrically connected to the sensing electrodes and therapy electrodes. The external medical device controller includes a data storage and at least one processor configured to perform a series of instructions that, when executed by the at least one processor, cause the at least one processor to receive one or more custom prompts from a health care professional for a physical activity test, cause the at least one processor to administer the physical activity test to the patient and communicate the one or more custom prompts to the patient during the physical activity test.

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: An ambulatory medical device comprises: a sensing component to be disposed on a patient for detecting a physiological signal of the patient; and monitoring and self-test circuitry configured for detecting a triggering event and initiating one or more self-tests based on detection of the triggering event. The ambulatory medical device senses the physiological signal of the patient substantially continuously over an extended period of time.

Abstract: According to at least one aspect, a wearable cardiac device is provided. The wearable cardiac device includes a garment worn about a torso of a patient, at least one sensing electrode to monitor cardiac activity of the patient, and a controller including a plurality of separate and distinct modules distributed about and/or integrated into the garment. The plurality of separate and distinct modules includes, for example, an operations module coupled to the at least one sensing electrode and configured to detect at least one cardiac condition of the patient and/or a communications module coupled to the operations module to communicate with an external device. In some examples, the wearable cardiac device may be configured as a treatment device and include an energy storage module coupled to at least one therapy electrode and configured to store energy for at least one therapeutic shock to be applied to the patient.

Abstract: A remote alarm for use with a wearable medical device. The remote alarm is configured to receive alarms, voice messages and prompts issued by the wearable medical device and to repeat those alarms, voice messages and prompts in a manner that can more easily be perceived by a patient wearing the wearable medical device or a bystander. The remote alarm can be configured to receive a communication from the wearable medical device, and in response, to identify one or more messages to be provided to the patient or a bystander. The messages may be provided audibly, visually, tactilely or combinations thereof. The remote alarm may further be configured to take certain actions depending upon the content of the communication, such as sending a telephone message to alert emergency personnel to the identity, location and medical condition of the patient, or sending an email.

Abstract: A wearable therapeutic device to facilitate care of a subject is provided. The wearable therapeutic device can include a garment having a sensing electrode. The garment includes at least one of an inductive element and a capacitive element, and a controller identifies an inductance of the inductive element or a capacitance of the capacitive element, and determines a confidence level of information received from the sensing electrode based on the inductance or the capacitance. The wearable therapeutic device also includes an alarm module coupled with the controller and configured to provide a notification to a subject based on the confidence level.

Abstract: An external medical device is provided which is configured to provide a user with access to one or more training modules. The external medical device includes one or more electrodes configured to detect a cardiac activity of a patient, an audio and/or visual output, and a controller coupled to the audio and/or visual output. The controller is configured to: detect at least one of a predetermined event and a device use pattern; and responsive to detecting the at least one of the predetermined event and the device use pattern, provide the patient access to one or more training modules relating to a use or a configuration of the external medical device via the audio and/or visual output. The device can also include a user interface configured to provide access to at least one training module according to a schedule of training modules for the patient.

Abstract: According to another example, a wearable medical device controller is provided. The device controller includes a memory and a processor coupled to the memory. The processor is configured to determine a correlation between a phenomenon identifiable by the wearable medical device controller and at least one response pattern associated with a patient and store, responsive to detecting the correlation, an adaptation path to address the at least one response pattern, the adaptation path specifying an adaptation of at least one characteristic of an alarm. The at least one response pattern may include a plurality of response patterns and the adaptation path may reflect adaptations made to address at least some of the plurality of response patterns.

Abstract: An electrode assembly that includes an electrically conductive layer, a first impedance reduction system, and a second impedance reduction system. The electrically conductive layer forms an electrode portion of the electrode assembly and a first surface to be placed adjacent a person's skin. The first impedance reduction system is configured to dispense a first amount of an electrically conductive gel onto the first surface of the electrically conductive layer in response to a first activation signal. The second impedance reduction system is configured to dispense a second amount of the electrically conductive gel onto the first surface of the electrically conductive layer in response to a second activation signal.