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 present disclosure relates to a pulse generating system comprising a pulse generator for generating a pulse or pulses and a controller for controlling the pulse generating means, where the pulse generating system is capable to work in at least a regular mode and a safety mode, where in the regular mode the pulse generator and the controller are connected and where in the safety mode there is no connection between the pulse generator and the controller and where in the safety mode the pulse generator automatically switches to a baseline stimulation command.

A medical device detects a previously defined event, and controls delivery of therapy to a patient according to therapy information associated with the previously defined event. In exemplary embodiments, the medical device enters a learning mode in response to a command received from a user, e.g., the patient or a clinician. In such embodiments, the medical device defines the event, collects the therapy information, and associates the therapy information with the defined event while operating in the learning mode. In some embodiments, the medical device defines the event based on the output of a sensor that indicates a physiological parameter of the patient during the learning mode. The sensor may be an accelerometer, which generates an output that reflects motion and/or posture of the patient. The medical device may collect therapy information by recording therapy changes made by the user during the learning mode.

This disclosure describes techniques for generation of sleep quality information based on posture state data. The techniques may include obtaining posture state data sensed by a medical device for a patient, generating sleep quality information based on lying posture state changes indicated by the posture state data, and presenting the sleep quality information to a user via a user interface.

The invention is directed to a communication system for a wireless message transfer between an implantable medical device (IMD) and an external device, comprising an IMD and an external device, wherein the IMD is configured to monitor the health status of a patient and/or configured to deliver a therapy signal to the patient, wherein the IMD comprises a processor, a memory module and a transceiver module configured to bi-directionally exchange the messages with the external device. In order to provide a communication system and method that enables a low-overhead means for supporting communication with a plurality of IMDs and facilitating targeted IMD-specific interactions as part of IMD assembly and in-clinic use, the external device is configured to send a predefined wake-up signal to the transceiver module of the IMD combined with an ID request message following the wake-up signal within a predefined first time interval.

A leadless cardiac pacemaker (LCP) may include a three-axis accelerometer. Acceleration signals from each of the three axes of the accelerometer may be combined into a combined acceleration signal and a predetermined morphological feature may be identified in a magnitude of the combined acceleration signal. The relative timing of the predetermined morphological signal relative to the cardiac cycle duration may be used to ascertain whether a detected arrhythmia is an arrhythmia that should be treated by the LCP or should not be treated by the LCP.

An implantable medical device (IMD) and process are provided comprising one or more electrodes configured to be implanted to define a pacing vector through at least a portion of a ventricle. Sensing circuitry is configured to sense intrinsic atrial activity (As) and intrinsic ventricular activity (Vs). A pulse generator (PG) if provided, and memory configured to store program instructions and an atrioventricular delay search parameter (AVD.sub.SEARCH). The AVD.sub.SEARCH is an interval of time. One or more processors, that when executing the program instructions, is configured to direct the PG to deliver ventricular pacing pulses based on an atrioventricular delay (AVD) and periodically initiate an AVD search operation utilizing the AVD.sub.SEARCH. A heart rate is determined and compared to a threshold. Responsive to determining that the heart rate exceeds the threshold, the AVD.sub.SEARCH is reduced, and cardiac activity is detected during the AVD search operation utilizing the reduced AVD.sub.SEARCH.

The technology disclosed herein relates to a system and method for analyzing medical device programming parameters. One aspect of the current technology is a method where an overall performance metric is detected for a cardiac medical device that is outside of a threshold at a first cardiac location in a patient. Processing circuitry identifies a first operating condition and sensing circuitry measures a first sensor response during the first operating condition. An adjustment is proposed to one or more programming parameters of the medical device based on the performance metric, the first operating condition, and the sensor response to the operating condition.

The disclosure describes techniques for associating therapy adjustments with posture states using a timer. The techniques may include detecting a patient adjustment to electrical stimulation therapy delivered to the patient, sensing a posture state of the patient, and associating the detected adjustment with the sensed posture state if the sensed posture state is sensed within a first period following the detection of the adjustment and if the sensed posture state does not change during a second period following the sensing of the sensed posture state.

An intracardiac ventricular pacemaker is configured to operate in in a selected one of an atrial-tracking ventricular pacing mode and a non-atrial tracking ventricular pacing mode. A control circuit of the pacemaker determines at least one motion signal metric from the motion signal, compares the at least one motion signal metric to pacing mode switching criteria; and responsive to the pacing mode switching criteria being satisfied, switches from the selected one of the non-atrial tracking pacing mode and the atrial tracking pacing mode to the other one of the non-atrial tracking pacing mode and the atrial tracking pacing mode for controlling ventricular pacing pulses delivered by the pacemaker.