Abstract: A sensor that detects a heart rate and/or a blood oxygen content includes a radiation source and a photodetector, wherein the radiation source includes a light-emitting diode array, the light-emitting diode array includes a plurality of emission regions, the emission regions each include a first light-emitting diode and a second light-emitting diode, the first light-emitting diode includes a first wavelength, the second light-emitting diode includes a second wavelength, and a distance between the first light-emitting diode and the second light-emitting diode within the emission regions is 100 micrometers or less.

Abstract: A noise-separating cardiac monitor is provided. An implantable housing includes an external surface. A wireless antenna is shaped to wrap around an interior periphery of the implantable housing. Electrodes are provided on a ventral surface of the implantable housing to capture P-wave signals and R-wave signals. Electronic circuitry is provided within the wearable housing and includes a low power microcontroller. A front end circuit includes a signal lead operable to sense cardiac electrical potentials through one of the electrodes, a reference lead operable to sense the cardiac electrical potentials through another electrode, and a reference generator configured to inject a driven reference to the reference lead. The signal lead includes a coupling capacitor and a protection resistor associated with thermal noise. The thermal noise is not contained in the driven reference and not introduced to the reference lead. A non-volatile memory is electrically interfaced with the microcontroller.

Abstract: Systems and methods are provided for continuously monitoring a user to determine when cardiovascular events are likely occurring and to responsively provide a prompt to a user to engage in additional physiological assessment of the putative cardiovascular event. Additional assessment can include the user engaging an additional sensor to provide signals that are more accurate, lower noise, or otherwise improved relative to a continuously-monitoring sensor used to initially detect the cardiovascular event. Detection of cardiovascular events includes using a cardiovascular classifier to determine, based on the output of such a continuously-monitoring sensor, whether the event is likely occurring. Such a classifier can be received from a cloud computing service or other remote system based on sensor outputs sent to such a system.

Abstract: Long-term electrocardiographic and physiological monitoring over a period lasting up to several years in duration can be provided through a continuously-recording subcutaneous insertable cardiac monitor (ICM). The sensing circuitry and the physical layout of the electrodes are specifically optimized to capture electrical signals from the propagation of low amplitude, relatively low frequency content cardiac action potentials, particularly the P-waves that are generated during atrial activation. In general, the ICM is intended to be implanted centrally and positioned axially and slightly to either the left or right of the sternal midline in the parasternal region of the chest. Additionally, the ICM includes an ECG sensing circuit that measures raw cutaneous electrical signals and performs signal processing prior to outputting the processed signals for sampling and storage.

Abstract: A method includes determining that a patient has heart failure with preserved ejection fraction (HFpEF); configuring a cardiovascular (CV) model using patient characterization data; determining one or more therapy parameters using output data of the CV model; and administering HFpEF therapy based on the one or more therapy parameters.

Abstract: A sensing and stimulation system includes a central hub, and a plurality of flexible arms extending from the central hub. Each of the arms includes at least one electrode and at least one sensor. Each of the arms is configured to perform sensing and stimulation including electrically stimulating biological material, and sensing biological responses and changes. The system includes a port configured to be alternatively connected to a remote control module for wireless operation of the system and a leaded connector for wired operation of the system.

Abstract: A system is provided for displaying heart graphic information relating to sources and source locations of a heart disorder to assist in evaluation of the heart disorder. A heart graphic display system provides an intra-cardiogram similarity (“ICS”) graphic and a source location (“SL”) graphic. The ICS graphic includes a grid with the x-axis and y-axis representing patient cycles of a patient cardiogram with the intersections of the patient cycle identifiers indicating similarity between the patient cycles. The SL graphic provides a representation of a heart with source locations indicated. The source locations are identified based on similarity of a patient cycle to library cycles of a library cardiogram of a library of cardiograms.

Abstract: The disclosure relates to a device and method of obtaining an electrocardiogram for a subject. The method comprises receiving electrical signals from at least two head-mounted sensors; and analysing said electrical signals to resolve shape and timing information for each of the P-, Q-, R-, S-, and T-waves available for the subject over a number of cardiac cycles, to derive a composite electrocardiogram, ECG, in which the composite electrocardiogram is derived using signals only from said head-mounted sensors.

Abstract: In an illustrative embodiment, methods and systems for attenuating effect(s) associated with reduction or cessation of substance use by an individual include providing a neurostimulation delivery system including a neurostimulation device having a first portion including a first electrode configured to electrically stimulate auricular branch(es) of the vagus nerve, and a second portion including a second electrode configured to electrically stimulate branch(es) of the auriculotemporal nerve, and a pulse generator including circuitry configured to deliver therapeutic stimulation pulses to the first and second electrodes. Methods and systems include positioning the neurostimulation device for administration of the neurostimulation treatment, whereby the first electrode is disposed on, over or adjacent to auricular branch(es) of the vagus nerve, and the second electrode is disposed on, over or adjacent to branch(es) of the auriculotemporal nerve, and administering the neurostimulation treatment.

Abstract: A medical device is configured to sense an electrical signal and determine that signal to noise criteria are met based on electrical signal segments stored in response to sensed electrophysiological events. The medical device is configured to determine an increased gain signal segment from one of the stored electrical signal segments in response to determining that the signal to noise criteria are met. The medical device determines a noise metric from the increased gain signal segment. The stored electrical signal segment associated with the increased gain signal segment may be classified as a noise segment in response to the noise metric meeting noise detection criteria.

Abstract: Defibrillator shock discharge control systems and schemes are described that control the shock discharge based at least in part on discharge capacitor voltage measurement taken after the defibrillation shock has been initiated.

Abstract: Systems, devices, and methods are discussed herein for wirelessly transmitting power and/or data to an implanted device, such as an implanted electrostimulator device. In an example, the subject matter includes a layered transmitter device with multiple conductive planes and excitation features. The transmitter device can be tuned to identify and apply device parameters for efficient wireless communication with a deeply implanted device. The transmitter is generally configured for midfield powering applications by providing signals that give rise to propagating signals inside of body tissue.

Abstract: A method and system are devised for quickly detecting an abnormal concentration of potassium ions in blood from an electrocardiogram. The system includes at least one vector-converting device that includes a processor, a transmitter, at least one memory and at least one storage unit. The at least one storage includes a model data module and a predicting and converting module. The model data module includes data of a model of the concentration of potassium in the blood. The model of the concentration of potassium in the blood includes at least one reference electrocardiogram and corresponding reference data of the concentration of potassium in the blood. The predicting and converting module converts an electrocardiogram into a corresponding predicted concentration of potassium in the blood according to the reference concentration of potassium in blood. The vector conversions device is connected to at least one electrocardiogram generator and at least one monitor.

Abstract: A hemodynamic parameter (Hdp) monitoring system for diagnosing a health condition of a patient and for establishing Hdp marker values or Hdp surrogate marker values for purposes of comparison with Hdp values of a patient is provided. An Hdp monitor senses, measures, and records Hdp values exhibited by the patient during a basal or non-exposure period and furthermore Hdp values exhibited by the patient during or after an exposure period during which the patient is exposed to low-energy electromagnetic output signals. An electrically-powered generator is adapted to be actuated to generate said low-energy electromagnetic carrier output signals for exposing or applying to the patient such output signals during said exposure period.

Abstract: The invention consists of a device to evaluate hemodynamic response generated by the spinal cord in response to a suprasensorial stimulus applied to a peripheral nerve (medium or posterior tibial) by the use of functional near-infrared spectroscopy (fNIRS). The device consists of 3 main components, an electrical stimulator, an optical recording unit and a signal processing and control module. The device allows non-invasive, comfortable, harmless, portable, home-based, and low-cost evaluation of changes in local hemodynamic parameters in response to neuronal activation of the spinal cord by electrical stimulation of a peripheral nerve. The invention also includes a corresponding method of using the device and monitoring the spinal function.

Abstract: A system and method for altering bone growth on and within an orthopedic implant that includes an implant body; a plurality of electrodes, wherein each electrode is at least partially embedded in the implant body, and comprises: a set of primary electrodes comprising at least one electrode, wherein a non-embedded segment of each primary electrode is proximal to a bone growth region, a set of secondary electrodes comprising at least one electrode, wherein a non-embedded segment of each secondary electrode is distal to the bone growth region, and wherein the plurality of electrodes are configured to function in a stimulation operating mode, such that a subset of primary electrodes function as cathodes and a subset of secondary electrodes function as anodes; a control system comprising a processor, and circuitry that connects to the plurality of electrodes; and a power system.

Abstract: An apparatus can have a computing component. The computing component can be configured to receive a wireless transmission from an implanted device, verify an identity of the implanted device by verifying security data from the implanted device, and perform an authentication procedure, in response to verifying the identity of the implanted device, to determine whether the transmission is authentic by determining whether a digital signature of the transmission is authentic. The apparatus can be configured to wirelessly charge the implanted device in response to the computing component determining that the digital signature is authentic.

Abstract: A system and method for determining a measurement of anxiety in a vehicle that include receiving sensor data from a plurality of sensors disposed within a plurality of areas of the vehicle. The system and method also include processing the sensor data into metrics associated with a type of measurement. Processing of the sensor data is completed by a neural network. The system and method also include analyzing the processed metrics and determining an anxiety level associated with an occupant of the vehicle. The system and method further include training the neural network based on the anxiety level and at least one driving event that is correlated with the anxiety level.

Abstract: Systems and methods for active charge-balancing for high frequency neural stimulation are disclosed.

Abstract: Described herein are methods, devices, and systems that monitor heart rate and/or for arrhythmic episodes based on sensed intervals that can include true R-R intervals as well as over-sensed R-R intervals. True R-R intervals are initially identified from an ordered list of the sensed intervals by comparing individual sensed intervals to a sum of an immediately preceding two intervals, and/or an immediately following two intervals. True R-R intervals are also identified by comparing sensed intervals to a mean or median of durations of sensed intervals already identified as true R-R intervals. Individual intervals in a remaining ordered list of sensed intervals (from which true R-R intervals have been removed) are classified as either a short interval or a long interval, and over-sensed R-R intervals are identified based on the results thereof. Such embodiments can be used, e.g., to reduce the reporting of and/or inappropriate responses to false positive tachycardia detections.