An implantable cardioverter defibrillator (ICD) receives a cardiac electrical signal by a sensing circuit while operating in a sensing without pacing mode and detects asystole based on the cardiac electrical signal. The ICD determines, in response to detecting the asystole, if asystole backup pacing is enabled, and automatically switches to a temporary pacing mode in response to the asystole backup pacing being enabled. Other examples of detecting asystole and providing a response to detecting asystole by the ICD are described herein.

A system for lead integrity monitoring includes an implantable medical device (IMD) having a housing enclosing a control circuit; and a lead, having a first sensor. The lead is coupled to the housing and electrically coupled to the control circuit. The system also includes at least one processing device configured to identify a first lead failure alert based on a first set of information; obtain a second set of information generated by a second sensor; perform an evaluation of the first set of information in the context of the second set of information; and confirm or cancel the first lead failure alert based on the evaluation.

A system comprising a remotely programmable micromonitor with a wireless sensing system-on-module (SOM), one or more sensors to detect one or more conditions in a subject by monitoring one or more parameters associated with the conditions by comparing any monitored parameter to a baseline measurement of the monitored parameter from the subject, a plurality of sensors corresponding to a monitored parameter and connected to the micromonitor to convey measurements of all monitored parameters, the sensors including at least one of a non-optical pulse wave sensor or an electrocardiogram (ECG) sensor, a communications module capable of communicating with a wireless technology, wherein the module can send an alert signal to the subject or an attending physician or a remote service center or any other subject, and one or more algorithms for monitoring conditions and/or for predicting conditions, including at least one of a fall detection or fall prediction algorithm.

A wearable monitoring device includes a plurality of cardiac sensing electrodes, a monitor, at least one motion sensor, and a controller. The plurality of cardiac sensing electrodes are positioned outside a body of a subject and to detect cardiac information of the subject. The monitor administers a predetermined test to the subject, and has a user interface configured to receive quality of life information from the subject. The at least one motion sensor is positioned outside the body of the subject and to detect subject motion during the predetermined test. The controller is communicatively coupled to the plurality of cardiac sensing electrodes, the monitor, and the at least one motion sensor, and receives and stores the detected cardiac information, the quality of life information, and the detected subject motion. The controller further communicates the stored detected subject motion and the quality of life information to a remote computer.

An indication that a patient event occurred may be used to evaluate the efficacy of at least one therapy program and/or adjust therapy delivery to the patient. In some examples, the patient event indication includes patient input that may be received via an event indication button of a programming device. In some examples, therapy delivery may be adjusted by adjusting at least one therapy parameter value, switching therapy programs or therapy program groups or restarting a therapy cycle of a medical device.

A sensory supplement medical device, including a stimulation device configured to implement a first functionality of the sensory supplement medical device corresponding to the providing of sensory supplement to a recipient to evoke a sensory percept, wherein the sensory supplement medical device is configured to implement a secondary functionality different from the first functionality, and the sensory supplement medical device is configured to migrate the second functionality to a device remote from the sensory supplement medical device.

The current technology is relevant to a system having a programming device capable of communication with an implantable medical device, where the programming device is configured to identify a patient condition comprising the patient's inability to exercise to a desired capacity, configured to notify a clinical user of the identified condition and configured to identify a therapy appropriate for the identified condition.

Disclosed are embodiments directed to security methods applied to connections between components in a distributed (networked) system including medical and non-medical devices, providing secure authentication, authorization, patient and device data transfer, and patient data association and privacy for components of the system.

A WCD system is configured to detect when a therapy administered to a patient by the WCD system is unsuccessful, and in response determine whether to send notifications to remote non-witness responders. The WCD system may be configured to decide to send such notifications after the WCD system determines it has administered a predetermined number of unsuccessful shocks to the patient. The predetermined number of unsuccessful shocks may be the maximum number of unsuccessful shocks the WCD system will administer to a patient, or every Xth shock (e.g., 3.sup.rd shock). The WCD system can be configured to periodically resend the notification. The notifications may be in form of SMS, voice messages, emails, app notifications, etc. sent to cell phones, smartphones, computers, laptops, tablets etc. of the responders either directly, via a server, or via a CAD-coupled server.

A lead impedance stimulation architecture and a dual current source and sink methodology to output a biphasic current pulse and measure a resulting induced voltage across the stimulation electrodes to determine lead impedance. A common mode capacitance on the electrode interface may have little impact on the stimulation architecture of this disclosure allowing for fast voltage rise time and consistent and accurate impedance measurement. In addition, the dual source and sink includes a monitor circuit on each of the source and the sink circuitry. In the event of an open circuit indicating a lead breakage, loose connection, lead migration, insulation leak, and so on, the monitor circuit may provide an output to indicate specifically which electrode is unable to reach the correct current stimulation amplitude. In this manner the techniques of this disclosure, may also detect a lead break in a single lead impedance measurement.