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1198 results about "Intracardiac Electrogram" patented technology
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Point of care diagnostic systems
InactiveUS6867051B1Accurate concentrationAccurately presenceComputer-assisted medical data acquisitionMedical imagesPoint of careDiagnostic test
Systems and methods for medical diagnosis or risk assessment for a patient are provided. These systems and methods are designed to be employed at the point of care, such as in emergency rooms and operating rooms, or in any situation in which a rapid and accurate result is desired. The systems and methods process patient data, particularly data from point of care diagnostic tests or assays, including immunoassays, electrocardiograms, X-rays and other such tests, and provide an indication of a medical condition or risk or absence thereof. The systems include an instrument for reading or evaluating the test data and software for converting the data into diagnostic or risk assessment information.
Owner:CYTYC CORP
Method and apparatus for identifying oversensing using far-field intracardiac electrograms and marker channels
A method for identifying and classifying various types of oversensing in implantable medical devices (IMDs), such as implantable cardioverter defibrillators (ICDs), to assist a physician in choosing corrective action to reduce the likelihood of oversensing and inappropriate therapy delivery. Far-field electrogram (EGM) signals are analyzed to detect the occurrence of R-waves, and the result is compared to the number and pattern of R-waves sensed by the IMD and indicated on the marker channel. A marker channel with more sensed R-waves than indicated by analysis of the far-field EGM indicates the presence of oversensing, including double-counting of R-waves, T-wave oversensing, lead malfunction or failure, poor lead connections, noise associated with electromagnetic interference, non-cardiac myopotentials, etc. Identification of the type of oversensing may be determined by analysis of the number and pattern of marker channel sensed R-waves with respect to the timing of the R-waves detected from the far-field EGM.
Owner:MEDTRONIC INC
Cardiac stimulation device for optimizing cardiac output with myocardial ischemia protection
InactiveUS6865420B1Reduce demandReduce detectionHeart stimulatorsCardiac muscleIntracardiac Electrogram
A cardiac stimulation device and method detect myocardial ischemia and provide a response for alleviating the ischemia. Myocardial ischemia is detected by identifying changes in the ST-segment of the intracardiac electrogram (EGM) sensed using large sensing electrode surfaces created by electrically coupling one or more cardiac electrodes or by using larger surface area shocking coils. Myocardial ischemia monitoring is performed when stimulation parameters are adjusted for increasing cardiac output, causing an increased metabolic demand to be placed on the myocardium itself. When myocardial ischemia is detected, stimulation parameters are re-adjusted to reduce the demand placed on the myocardium and thereby alleviate the ischemia.
Owner:PACESETTER INC
Cardiac management device with capability of noise detection in automatic capture verification
An implantable cardiac rhythm management device operable in an autothreshold or autocapture verification mode, wherein the rhythm management device is capable of detecting noise that affects signal characteristics of a sensed intracardial evoked response electrogram signal. The device includes a noise detection circuit that determines whether a minimum peak timing occurs during a predetermined time following delivery of a stimulation pulse. If a minimum peak timing occurs during the predetermined time following delivery of the stimulation pulse, then significant amounts of noise affecting the signal characteristics of the electrocardiogram signal is assumed.
Owner:CARDIAC PACEMAKERS INC
Apparatus and method for cardiac ablation
InactiveUS20050148892A1ElectrocardiographyControlling energy of instrumentVisual perceptionIntracardiac Electrogram
A system and method for cardiac mapping and ablation include a multi-electrode catheter introduced percutaneously into a subject's heart and deployable adjacent to various endocardial sites. The electrodes are connectable to a mapping unit, an ablation power unit a pacing unit, all of which are under computer control. Intracardiac electrogram signals emanated from a tachycardia site of origin are detectable by the electrodes. Their arrival times are processed to generate various visual maps to provide real-time guidance for steering the catheter to the tachycardia site of origin. In another aspect, the system also include a physical imaging system which is capable of providing different imaged physical views of the catheter and the heart. These physical views are incorporated into the various visual maps to provide a more physical representation. Once the electrodes are on top of the tachycardia site of origin, electrical energy is supplied by the ablation power unit to effect ablation.
Owner:DESAI JAWAHAR M
Content based selection and meta tagging of advertisement breaks
A system evaluates stimulus materials such as videos, imagery, web pages, text, etc., in order to determine resonance and priming levels for various products and services at different temporal and spatial locations including advertisement breaks in the stimulus materials. The stimulus materials are tagged with resonance and priming level information to allow intelligent selection of suitable advertisement content for insertion at various locations in the stimulus materials. Response data such as survey data and / or neuro-response data including Event Related Potential (ERP), Electroencephalography (EEG), Galvanic Skin Response (GSR), Electrocardiograms (EKG), Electrooculography (EOG), eye tracking, and facial emotion encoding data may be used to determine resonance and priming levels.
Owner:NIELSEN CONSUMER LLC
Stimulus placement system using subject neuro-response measurements
ActiveUS20090062629A1ElectroencephalographyElectrocardiographySystems analysisEeg electroencephalography
A system evaluates and selects temporal and spatial locations for introduction of stimulus material. Video streams, physical locations, print advertisements, store shelves, images, commercials, etc. are analyzed to identify locations for introducing stimulus material, such as messages, brand images, products, media, marketing and / or other sales materials. The system analyzes neuro-response measurements from subjects exposed to stimulus material in different temporal and spatial locations. Examples of neuro-response measurements include Electroencephalography (EEG), Galvanic Skin Response (GSR), Electrocardiograms (EKG), Electrooculography (EOG), eye tracking, and facial emotion encoding measurements. Neuro-response measurements are analyzed to select temporal and spatial locations for introduction of stimulus material.
Owner:NIELSEN CONSUMER LLC
Consumer experience assessment system
ActiveUS20090063255A1ElectroencephalographyElectrocardiographyEeg electroencephalographyEvaluation system
A system assesses consumer experience by evaluating neuro-response measurements for a consumer exposed to products, services, offerings, and stimulus. Examples of neuro-response measurements include Electroencephalography (EEG), Galvanic Skin Response (GSR), Electrocardiograms (EKG), Electrooculography (EOG), eye tracking, and facial emotion encoding measurements. Components of a consumer experience are analyzed to assess neuro-response measurements specific to each component. In many instances, neuro-response data is combined with other data and analyzed to determine total consumer experience.
Owner:NIELSEN CONSUMER LLC
Apparatus for detecting sleep apnea using electrocardiogram signals
There is provided a method of determining a diagnostic measure of sleep apnea including the following steps: acquiring an electrocardiogram signal, calculating a set of RR intervals and electrocardiogram-derived respiratory signal from said electrocardiogram, and hence calculating a set of spectral and time-domain measurements over time periods including power spectral density, mean, and standard deviation. These measurements are processed by a classifier model which has been trained on a pre-existing data base of electrocardiogram signals to provide a probability of a specific time period containing apneic episodes or otherwise. These probabilities can be combined to form an overall diagnostic measure. The system also provides a system and apparatus for providing a diagnostic measure of sleep apnea.
Owner:RESMED SENSOR TECH
Neuro-response stimulus and stimulus attribute resonance estimator
A system determines neuro-response stimulus and stimulus attribute resonance. Stimulus material and stimulus material attributes such as communication, concept, experience, message, images, audio, pricing, and packaging are evaluated using neuro-response data collected with mechanisms such as Event Related Potential (ERP), Electroencephalography (EEG), Galvanic Skin Response (GSR), Electrocardiograms (EKG), Electrooculography (EOG), eye tracking, and facial emotion encoding. Neuro-response data is analyzed to determine stimulus and stimulus attribute resonance.
Owner:NIELSEN CONSUMER LLC
Neuro-physiology and neuro-behavioral based stimulus targeting system
A system performs stimulus targeting using neuro-physiological and neuro-behavioral data. Subjects are exposed to stimulus material such as marketing and entertainment materials and data is collected using mechanisms such as Electroencephalography (EEG), Galvanic Skin Response (GSR), Electrocardiograms (EKG), Electrooculography (EOG), eye tracking, and facial emotion encoding. Neuro-physiological and neuro-behavioral data collected is analyzed to select targeted stimulus materials. The targeted stimulus materials are provided to particular subjects for a variety of purposes.
Owner:NIELSEN CONSUMER LLC
Point of care diagnostic systems
InactiveUS6936476B1Accurate concentrationAccurately presenceScattering properties measurementsComputer-assisted medical data acquisitionPoint of careDiagnostic test
Systems and methods for medical diagnosis or risk assessment for a patient are provided. These systems and methods are designed to be employed at the point of care, such as in emergency rooms and operating rooms, or in any situation in which a rapid and accurate result is desired. The systems and methods process patient data, particularly data from point of care diagnostic tests or assays, including immunoassays, electrocardiograms, X-rays and other such tests, and provide an indication of a medical condition or risk or absence thereof. The systems include an instrument for reading or evaluating the test data and software for converting the data into diagnostic or risk assessment information.
Owner:CYTYC CORP
System and method for determining optimal atrioventricular delay based on intrinsic conduction delays
ActiveUS7248925B2ElectrotherapyArtificial respirationIntracardiac ElectrogramSurface electrocardiogram
A system and method for estimating optimal atrioventricular delay values for use in pacing the ventricles. Both the intrinsic inter-atrial conduction delay and the intrinsic atrioventricular conduction delay are determined for the patient and then the preferred atrioventricular pacing delay is derived therefrom. By taking into account intrinsic inter-atrial delay along with intrinsic atrioventricular delay, a more reliable estimate of the true optimal atrioventricular delay values for the patient can be achieved than with techniques that only take into account intrinsic atrioventricular delay values. In one example, the technique uses intracardiac electrogram (IEGM) signals and surface electrocardiogram (EKG) signals and hence can be performed by an external programmer without requiring Doppler echocardiography or other cardiac performance monitoring techniques. In another example, wherein the implanted device is equipped with a coronary sinus lead, the technique uses only IEGM signals and hence can be performed by the device itself.
Owner:PACESETTER INC
Apparatus And Method For Cardiac Ablation
InactiveUS20070161915A1ElectrocardiographyControlling energy of instrumentVisual perceptionIntracardiac Electrogram
A system and method for cardiac mapping and ablation include a multi-electrode catheter introduced percutaneously into a subject's heart and deployable adjacent to various endocardial sites. The electrodes are connectable to a mapping unit, an ablation power unit a pacing unit, all of which are under computer control. Intracardiac electrogram signals emanated from a tachycardia site of origin are detectable by the electrodes. Their arrival times are processed to generate various visual maps to provide real-time guidance for steering the catheter to the tachycardia site of origin. In another aspect, the system also include a physical imaging system which is capable of providing different imaged physical views of the catheter and the heart. These physical views are incorporated into the various visual maps to provide a more physical representation. Once the electrodes are on top of the tachycardia site of origin, electrical energy is supplied by the ablation power unit to effect ablation.
Owner:CATHEFFECTS
Methods and systems for real time breath rate determination with limited processor resources
InactiveUS20060178591A1Less durationElectrocardiographyInertial sensorsTidal volumeMonitoring system
A method for recognizing occurrences of breaths in respiratory signals. The method includes receiving digitized respiratory signals that includes tidal volume signals, filtering the received respiratory signals to limit artifacts having a duration less than a selected duration, and recognizing breaths in the filtered respiratory signals. A breath is recognized when amplitude deviations in filtered tidal volume signals exceed a selected fraction of an average of previously determined breaths. This invention also include methods for recognizing breathes from electrocardiogram R-waves; computer methods having code for performing the methods of this invention; monitoring systems that monitor a subject and include local or remote computers or other devices that perform the methods of this invention.
Owner:VIVOMETRICS INC
Automatic method to delineate or categorize an electrocardiogram
ActiveUS20170112401A1Health-index calculationMedical automated diagnosisEcg signalMulti-label classification
A method for computerizing delineation and / or multi-label classification of an ECG signal, includes: applying a neural network to the ECG whereby labelling the ECG, and optionally displaying the labels according to time, optionally with the ECG signal.
Owner:KONINKLJIJKE PHILIPS NV
System and method for distinguishing between hypoglycemia and hyperglycemia using an implantable medical device
ActiveUS7524287B2Improve blood sugar controlReduce deliveryElectrotherapyElectrocardiographyAcute hyperglycaemiaT wave
Techniques are described for detecting and distinguishing among ischemia, hypoglycemia or hyperglycemia based on intracardiac electrogram (IEGM) signals. In one technique, these conditions are detected and distinguished based on an analysis of: the interval between the QRS complex and the peak of a T-wave (QTmax), the interval between the QRS complex and the end of a T-wave (QTend), alone or in combination with a change in ST segment elevation. By exploiting QTmax and QTend in combination with ST segment elevation, changes in ST segment elevation caused by hypo / hyperglycemia can be properly distinguished from changes caused by cardiac ischemia. In another technique, hyperglycemia and hypoglycemia are predicted, detected and / or distinguished from one another based on an analysis of the amplitudes of P-waves, QRS-complexes and T-waves within the IEGM. Appropriate warning signals are delivered and therapy is automatically adjusted.
Owner:PACESETTER INC
Electrocardiograph leads-off indicator
A “leads-off indicator” for an ECG apparatus for indicating that one or more of a plurality of ECG electrodes is not properly affixed to a patient and that that obviates the need for a conventional high frequency drive signal, but instead, employs common mode input noise as a drive signal to a reference electrode such that if one of the electrodes defining an ECG vector is not properly affixed, an increase in the ambient noise on an ECG vector associated with the detached electrode occurs as a detectable event. A first algorithm is used to identify whether or not the reference electrode itself is properly affixed to the patient's right leg and, if so, the common mode signal presented to the remaining limb electrodes becomes unbalanced should one of the limb electrodes not be properly connected to the patient. An impedance balancing circuit is provided for developing signals allowing identification of a lose electrode when the ECG system does not utilize a right leg electrode as a reference.
Owner:CARDIAC PACEMAKERS INC
System and method for distinguishing between hypoglycemia and hyperglycemia using an implantable medical device
ActiveUS20060167365A1Improve blood sugar controlReduce deliveryElectrotherapyElectrocardiographyAcute hyperglycaemiaT wave
Techniques are described for detecting and distinguishing among ischemia, hypoglycemia or hyperglycemia based on intracardiac electrogram (IEGM) signals. In one technique, these conditions are detected and distinguished based on an analysis of: the interval between the QRS complex and the peak of a T-wave (QTmax), the interval between the QRS complex and the end of a T-wave (QTend), alone or in combination with a change in ST segment elevation. By exploiting QTmax and QTend in combination with ST segment elevation, changes in ST segment elevation caused by hypo / hyperglycemia can be properly distinguished from changes caused by cardiac ischemia. In another technique, hyperglycemia and hypoglycemia are predicted, detected and / or distinguished from one another based on an analysis of the amplitudes of P-waves, QRS-complexes and T-waves within the IEGM. Appropriate warning signals are delivered and therapy is automatically adjusted.
Owner:PACESETTER INC
Catheterization method and system for controlling tip displacement
ActiveUS7640053B2Effectively avoid drawback and limitation of X-rayRapidly catheterizationElectrocardiographyEar treatmentControl signalSignal on
Owner:ST JUDE MEDICAL INT HLDG SARL
Device and method for electrocardiography on freely moving animals
An electrocardiography device and method that is able to obtain the electrocardiogram of a freely moving animal. The device and method utilizes at least two catheters to obtain the electrical signals from the heart of the animal being tested. The catheters are filled with an electrically-conductive, physiological solution and are used in combination with at least two test leads that are able to transfer the electrical signals from the animal to an ECG monitoring device. The device and method also allows for fluids to flow through the catheters to other devices such as a blood sampler controller and / or an infusion pump.
Owner:BIOANALYTICAL SYST
System and method for detecting physiologic states based on intracardiac electrogram signals while distinguishing cardiac rhythm types
ActiveUS8262578B1Improvement in detection and discriminationElectrocardiographyInertial sensorsMedicinePhysiologic States
Techniques are provided for tracking patient respiration or other physiologic states based upon intracardiac electrogram (IEGM) signals. In one example, respiration patterns are detected based upon cycle-to-cycle changes in morphological features associated with individual cardiac cycles while taking into account different cardiac rhythm types within the patient, such as predominantly paced or predominantly intrinsic rhythm types. Once respiration patterns have been identified, episodes of abnormal respiration, such as apnea, hyperpnea, nocturnal asthma, or the like, may be detected and therapy automatically delivered. In addition, techniques for detecting abnormal respiration using a pattern classifier are described, wherein the pattern classifier is trained while distinguishing the different cardiac rhythm types of the patient.
Owner:PACESETTER INC
Database of body surface ECG P wave integral maps for localization of left-sided atrial arrhythmias
InactiveUS6931273B2ElectrotherapyElectrocardiographyIsorhythmic Atrioventricular DissociationHypsarrhythmia
A system and method are provided for developing a database of body surface ECG P-wave maps for classification and localization of left-sided atrial arrhythmias. The system and method include generating and receiving P-wave data in a subject by left atrial pacing or receiving P-wave data in a subject during spontaneously occurring or induced left atrial arrhythmias; computing (e.g. potential or integral) maps of the P-wave data; classifying the maps specific to a left atrial ectopic origin; verifying the classification procedure; averaging the classified maps into mean maps; and storing and accessing the mean maps in the database. The mean maps of the P-wave data in the database can be used to automatically classify and localize P-wave data from a patient obtained during a left atrial arrhythmia such as atrial tachycardia, focal atrial fibrillation, or orthodromic atrioventricular reentrant tachycardia.
Owner:RGT UNIV OF CALIFORNIA
Systems and methods for selectively limiting multi-site ventricular pacing delays during optimization of cardiac resynchronization therapy parameters
ActiveUS8583230B2Reduce the amount required</b> can be greatly reducedElectrotherapyMulti siteLeft ventricular size
Techniques are provided for use with implantable cardiac stimulation devices equipped for multi-site left ventricular (MSLV) cardiac pacing. Briefly, intraventricular and interventricular conduction delays are detected for paced cardiac events. Maximum pacing time delays are determined for use with MSLV pacing where the maximum pacing time delays are set based on the conduction delays to values sufficient to avoid capture problems due to wavefront propagation, such as fusion or lack of capture. MSLV pacing delays are then set to values no greater than the maximum pacing delays and cardiac resynchronization therapy (CRT) is delivered using the MSLV pacing delays. In an example where an optimal interventricular pacing delay (VV) is determined in advance using intracardiac electrogram-based or hemodynamic-based optimization techniques, the optimal value for VV can be used as a limiting factor when determining the maximum MSLV pacing time delays.
Owner:PACESETTER INC
System and method for detecting abnormal respiration based on intracardiac electrogram signals using a pattern recognition device
ActiveUS7435221B1Improvement in abnormal respiration detectionImprove discriminationMedical data miningElectrocardiographyElectricityMedicine
Techniques are provided for detecting abnormal respiration within a patient based upon intracardiac electrogram (IEGM) signals or other electrical cardiac signals. Briefly, abnormal respiration is detected using a pattern recognition trained to discriminate normal and abnormal respiration based on morphological parameters and interval-based parameters extracted from the IEGM signals. In addition, techniques are described for distinguishing among different cardiac rhythm types within the patient while using one or more pattern classifiers or other pattern recognition devices.
Owner:PACESETTER INC
System and method for detecting abnormal respiration via respiratory parameters derived from intracardiac electrogram signals
Techniques are provided for tracking patient respiration based upon intracardiac electrogram (IEGM) signals or other electrical cardiac signals. Briefly, respiration patterns are detected based upon cycle-to-cycle changes in morphological features associated with individual electrical events with the IEGM signals. For example, slight changes in the peak amplitudes of QRS-complexes, P-waves or T-waves are tracked to identify cyclical variations representative of patient respiration. Alternatively, the integrals of the morphological features of the individual events may be calculated for use in tracking respiration. In any case, once respiration patterns have been identified, episodes of abnormal respiration, such as apnea, hyperpnea, nocturnal asthma, or the like, may be detected and therapy automatically delivered. In particular, techniques for detecting abnormal respiration based on various respiratory parameters derived from the IEGM—such as respiration depth and respiration power—are described.
Owner:PACESETTER INC
Apparatus for detecting the position of a percutaneously-inserted intravenous catheter
An apparatus that is able to detect the position of a catheter. The apparatus utilizes a catheter filled with electrically-conductive physiological saline and a connector for establishing an electrical connection between the saline of the catheter and an input of a controller. The controller includes at least one output connectable to a standard ECG lead connector, wherein the controller includes circuitry for generating a low impedance output signal. The controller provides an output which replicates the input a standard ECG patient lead connector is configured to receive. The apparatus provides a more convenient and cost effective solution for providing specialized ECG functions without having to replace a hospital's existing ECG beside monitoring equipment.
Owner:NEWCASTLE UPON TYNE HOSPITALS NAT HEALTH SERVICE TRUST
The ECG shirt
InactiveUS20110004088A1Less timeWide variationElectrocardiographySensorsExercise testingsLead Placement
The electrocardiograph (ECG) Shirt is an extremely elastic non-electric and non-mechanical method that creates a more secure bond to the skin and more accurate and standardized ECG electrode lead placement for men, women, and children. The ECG Shirt reduces unexpected movement or dislocation. Contrasted with much prior art that analyzes errors after the fact the ECG Shirt eliminates the potential for errors to occur. The ECG Shirt is capable of using most ECG devices with different types of electrode lead connectors or pads. The ECG Shirt facilitates not only twelve lead resting ECG testing but also exercise testing, monitoring, fifteen lead, and two different types of eighteen lead ECG testing. The ECG Shirt is a tool for teaching expert ECG electrode lead placement.
Owner:GROSSMAN KURT PAUL
System and method for ICG recording and analysis
InactiveUS20060111641A1Improve the impedance effectImproved reporting of the hemodynamic parametersDiagnostic recording/measuringSensorsGraphicsBlood flow
An ICG control system for improved performance of Impedance Cardiography and improved reporting of the hemodynamic parameters obtained during an Impedance Cardiography (ICG) session. When the ICG control system is used, impedance waveforms, ECG Waveforms, and hemodynamic parameters are recorded continuously for each session. The parameters and / or pictorial representations are stored in a computer memory for recall, and the parameters may be recalled in formats particularly conducive to assessing and managing a patient's hemodynamic status.
Owner:RENEW GRP +1
Device, method and computer-readable storage medium for enhanced sense event classification in implantable devices by means of morphology analysis
ActiveUS20090240157A1Accurate classificationEffective calculationElectrotherapyElectrocardiographyEcg signalCardiac pacemaker electrode
An implantable cardiac device, e.g., a pacemaker, defibrillator, cardioverter or biventricular pacing device, that can sense cardiac electrical signals and accurately classify the sensed events. The device provides a template signal and a test signal originated from an electrogram. The device further transforms at least the test signal into a representation of the test signal for example in numerical format where the sample values of the test signal take the form of integers. The device further determines a correlation between the template and test signals, and classifies the sense events based on the correlation. The electrogram may be an intracardiac electrogram (IEGM), atrial electrogram (AEGM), ventricular electrogram (VEGM), surface electrocardiogram (ECG) or subcutaneous electrogram.
Owner:BIOTRONIK SE & CO KG
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