According to an embodiment of a method for providing neural stimulation, activity is sensed, and neural stimulation is automatically controlled based on the sensed activity. An embodiment determines periods of rest and periods of exercise using the sensed activity, and applies neural stimulation during rest and withdrawing neural stimulation during exercise. Other embodiments are provided herein.

A medical device senses cardiac electrical signals including T-waves attendant to ventricular myocardial repolarizations and detects a T-wave template condition associated with non-pathological changes in T-wave morphology. The device generates a T-wave template from T-waves sensed by the sensing circuit during the T-wave template condition. After generating the T-wave template, the device acquires a T-wave signal from the cardiac electrical signal and compares the acquired T-wave signal to the T-wave template. The device detects a pathological event in response to the acquired T-wave signal not matching the T-wave template.

A medical system includes at least two sensing modules that each generate an optical signal that changes as a function of a physiological parameter of a patient. The sensing modules may be coupled to a common light source and a common receiver via an optically transmissive member. At least a first sensing module that is closest to the light source along a length of the optically transmissive member may include a waveguide to split the light emitted by the light source. A first portion of the light may be directed toward the first sensing module and a second portion of the light may be directed toward a second sensing module that is placed downstream of the first sensing module in a direction substantially along the direction of light flow through the optically transmissive member and away from the light source.

A system and method to monitor and control heart rhythms using ultrasonic signals, including providing pacing and defibrillation therapy, are provided. A device for monitoring and controlling heart rhythms includes an intra-cardiac implantable device having an ultrasonic transducer to receive and/or transmit ultrasonic signals, and pacing circuitry to convert an acoustic signal into an electrical signal to stimulate or control a cardiac rhythm

A system for assigning zone rankings to a patient. The system includes a processor, at least one database, and a computer readable medium in communication with the at least one database and comprising one or more instructions that, when executed, can cause the processor to receive at least one physiological signal from a medical monitoring device that is worn by a patient; assign a normal zone ranking to the patient based upon historical patient data stored on the at least one database; determine one or more metrics from the at least one physiological signal of the patient; assign a first zone ranking to the patient based upon the one or more metrics, the first zone ranking selected from a plurality of abnormal zone rankings stored on the at least one database; determine one or more actions to initiate based upon the assigned first zone ranking; and initiate the one or more determined actions.

A cardiac pacing system that includes an implantable pulse generator and electrical leads that include a lead body portion having a distal end and a proximal end, a connector configured to electrically connect the proximal end of the lead body to the pulse generator, and at least one electrode disposed at the distal end of the lead body for delivering electrical stimulation to a patient's heart, wherein the distal end of the lead body is configured to terminate within the mediastinum of the thoracic cavity of the patient, proximate to the heart.

This document discusses, among other things, systems and methods for monitoring a patient at risk of epilepsy. A system comprises a sensor circuit that senses from the patient at least first and second physiological or functional signals. A wellness detector circuit can detect an epileptic event using the sensed physiological or functional signals, or additionally classify the epileptic event into one of epileptic seizure types. The system can generate a wellness indicator based on a trend of the physiological or functional signal during the detected epileptic event. The wellness indicator indicates an impact of the detected epileptic event on the health status of the patient. The system includes an output unit configured to output the detection of the epileptic event or the wellness indicator to a user or a process.

A cardiac rhythm management system provides an increase in pacing rate as a combination of responses to three characteristics of a relative-temperature signal: a dip, a positive slope, and a positive magnitude. The relative-temperature signal is the difference between a short-term and a long-term temperature average. A dip produces a limited and temporary rate increase having a first proportionality. A positive slope produces a rate increase with a second proportionality. A positive magnitude produces a rate increase with a third proportionality. The dip response seeds the slope response to provide a seamless and immediate rate transition after a dip. The cardiac rhythm management system limits and filters the sum of the rate increases to provide a sensor indicated rate, which is used to stimulate the heart.

A system embodiment comprises an implantable device including controller circuitry, memory, a transceiver, and a generator configured to generate electrical stimulation to modulate the neural activity. The controller circuitry and the transceiver configured to cooperate to receive, from another device, data corresponding to a user-programmable stimulation pattern and store the data in the memory. The user-programmable pattern includes a programmable pattern of bursts with multiple burst durations and multiple burst interval sequences, and the bursts include pulses with a user-programmable wave morphology. The controller circuitry is operably connected to the memory and the generator to use the data stored in the memory to control generation of the electrical stimulation to provide the user-programmable stimulation pattern that includes the pulses with the user-programmable wave morphology and that includes the multiple burst durations and the multiple burst interval sequences.

A cardiopulmonary resuscitation (CPR) assisting apparatus, comprising: a gasping-stimulating electrode configured to stimulate the thorax diaphragm to cause a gasping action; and a controller configured to control the stimulation applied by the gasping-stimulating electrode.