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698 results about "Cardiac pacemaker electrode" patented technology
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Artificial cardiac pacemaker. A pacemaker (or artificial pacemaker, so as not to be confused with the heart's natural pacemaker) is a medical device that generates electrical impulses delivered by electrodes to contract the heart muscles and regulate the electrical conduction system of the heart.
Apparatus and methods of bioelectrical impedance analysis of blood flow
InactiveUS6095987AAccurately and non-invasively and continuously measuring cardiac outputCatheterSensorsBioelectrical impedance analysisCardiac pacemaker electrode
Apparatus and methods are provided for monitoring cardiac output using bioelectrical impedance techniques in which first and second electrodes are placed in the trachea and / or bronchus in the vicinity of the ascending aorta, while an excitation current is injected into the thorax via first and second current electrodes, so that bioelectrical impedance measurements based on the voltage drop sensed by the first and second electrodes reflect voltage changes induced primarily by blood flow dynamics, rather than respiratory or non-cardiac related physiological effects. Additional sense electrodes may be provided, either internally, or externally, for which bioelectrical impedance values may be obtained. Methods are provided for computing cardiac output from bioelectrical impedance values. Apparatus and methods are also provided so that the measured cardiac output may be used to control administration of intravenous fluids to an organism or to optimize a heart rate controlled by a pacemaker.
Owner:ECOM MED
Leadless Cardiac Pacemaker with Secondary Fixation Capability
The invention relates to leadless cardiac pacemakers (LBS), and elements and methods by which they affix to the heart. The invention relates particularly to a secondary fixation of leadless pacemakers which also include a primary fixation. Secondary fixation elements for LBS's may either actively engage an attachment site, or more passively engage structures within a heart chamber. Active secondary fixation elements include a tether extending from the LBS to an anchor at another site. Such sites may be either intracardial or extracardial, as on a vein through which the LBS was conveyed to the heart, the internal or external surface thereof. Passive secondary fixation elements entangle within intraventricular structure such as trabeculae carneae, thereby contributing to fixation of the LBS at the implant site.
Owner:NANOSTIM
System and method for controlling rate-adaptive pacing based on a cardiac force-frequency relation detected by an implantable medical device
InactiveUS20100234906A1Reduce slopeDecrease in abscissaCatheterHeart stimulatorsCardiac pacemaker electrodeImplantable cardioverter-defibrillator
Techniques are provided for use in controlling rate-adaptive pacing within implantable medical devices such as pacemakers or implantable cardioverter-defibrillators (ICDs). In one example, a force-frequency relationship is determined for the heart of the patient, which is representative of the relationship between cardiac stimulation frequency and myocardial contractile force. To this end, various parameters are detected for use as surrogates for contractile force, including selected systolic pressure parameters and cardiogenic impedance parameters. Rate-adaptive pacing is then controlled based on the detected force-frequency relationship to, for example, deactivate rate-adaptive pacing if the slope and / or abscissa of the force-frequency relationship indicates significant contractility dysfunction within the patient. In other examples, rather than deactivating rate-adaptive pacing, control parameters are adjusted to render the rate-adaptive pacing less aggressive. In still other examples, trends in the slope and / or abscissa of the force-frequency relationship are monitored to detect contractility dysfunction and / or heart failure and titrate medications accordingly.
Owner:PACESETTER INC
Heart pacemaker
InactiveUS6144879ASimple procedureDepolarizationEpicardial electrodesHeart stimulatorsDielectricLeft cardiac chamber
A heart pacemaker which is arranged to stimulate the apical area of the heart. Stimulation of this area provides synchronous mechanical contraction of the left and right ventricles and overcomes the problem of pacemaker induced left bundle branch block type conduction disturbance. The pacemaker has a base surface which conforms to the apical area of the heart and mounts a plurality of epicardial stimulating electrodes. Selection of electrodes can be made to provide the most clinically appropriate stimulation. An opposite side of the pacemaker is arranged to contact the diaphragm and is provided with sensing electrodes to sense activity of the diaphragm and adjust pacing of the heart in accordance with changes in physical activity of the patient. The electrodes used are preferably of capacitive construction, having first and second capacitive plates either side of a dielectric formed by the body of the pacemaker.
Owner:GRAEMED PTY
Leadless cardiac pacemaker with conducted communication
ActiveUS20120109236A1Convenient timeHeart defibrillatorsHeart stimulatorsCardiac pacemaker electrodeCardiac pacemaker
Owner:PACESETTER INC
Method of pacing a heart using implantable device
InactiveUS6915149B2Increase heightElectrocardiographyCatheterCardiac pacemaker electrodeImplanted device
A method of determining an optimal location for implanting a pacemaker electrode includes the steps of pacing a heart from a first location and generating a first map of the heart associated with pacing at the first location. The heart is paced from a second location and a second map is generated of the heart associated with pacing at the second location. The first and second maps are compared in order to diagnose the effect of the pacing and an optimal location for implanting the pacemaker electrode based on the comparison of the maps is selected.
Owner:BIOSENSE
Vagal nerve stimulation techniques for treatment of epileptic seizures
InactiveUS6961618B2ElectrotherapyDiagnostic recording/measuringImplantable ElectrodesCardiac pacemaker electrode
Owner:FLINT HILLS SCI L L C
Vagal nerve stimulation techniques for treatment of epileptic seizures
InactiveUS6920357B2ElectrotherapyDiagnostic recording/measuringImplantable ElectrodesCardiac pacemaker electrode
The present invention uses electrical stimulation of the vagus nerve to treat epilepsy with minimized or no effect on the heart. Treatment is carried out by an implantable signal generator, one or more implantable electrodes for electrically stimulating a predetermined stimulation site of the vagus nerve, and a sensor for sensing characteristics of the heart such as heart rate. The heart rate information from the sensor can be used to determine whether the vagus nerve stimulation is adversely affecting the heart. Once threshold parameters are met, the vagus nerve stimulation may be stopped or adjusted. In an alternative embodiment, the invention may include a modified pacemaker to maintain the heart in desired conditions during the vagus nerve stimulation. In yet another embodiment, the invention may be simply a modified pacemaker having circuitry that determines whether a vagus nerve is being stimulated. In the event that the vagus nerve is being stimulated, the modified pacemaker may control the heart to maintain it within desired conditions during the vagus nerve stimulation.
Owner:OSORIO IVAN +1
Remotely enabled pacemaker and implantable subcutaneous cardioverter/defibrillator system
ActiveUS20060241701A1Relieve painSafe and effective operationHeart defibrillatorsSubcutaneous implantationCardiac pacemaker electrode
Subcutaneous Implantable cardioverter-defibrillators (SubQ ICDS) are disclosed that are entirely implantable subcutaneously with minimal surgical intrusion into the body of the patient and provide distributed cardioversion-defibrillation sense and stimulation electrodes for delivery of cardioversion-defibrillation shock and pacing therapies across the heart when necessary. The SubQ ICD is implemented with other implantable and external medical devices and communicates to provide drugs and therapy in a coordinated and synergistic manner.
Owner:MEDTRONIC INC
Self-powered resonant leadless pacemaker
InactiveUS20070293904A1Increases natural velocity and acceleration of heart muscleExtended durationElectrotherapyCardiac cycleCardiac pacemaker electrode
A self-powered medical device, for example a pacemaker uses the variations of blood pressure inside the heart or a major artery to create a mechanical resonance in an electromagnetic or piezoelectric generator. The resonance extends the time power is generated during the cardiac cycle. The pressure variations compress a bellows carrying the resonant generator. The inside of the bellows may be evacuated to a partial or full vacuum, and a spring restores the bellows to the desired equilibrium point, acting against the blood pressure. The current pulses are stored in a capacitor. Eliminating the battery allows dramatic miniaturization of the medical device to the point it can be implanted at the point of desired stimulation via a catheter.
Owner:LG RES PARTNERSHIP
Method and apparatus for monitoring ingestion of medications using an implantable medical device
ActiveUS7414534B1Reduce the possibilityIncrease chances of survivalDrug and medicationsSurgeryTransceiverCardiac pacemaker electrode
An implantable medical device, such as a pacemaker or implantable cardioverter defibrillator (ICD), is configured to automatically detect ingestion of medications to verify that prescribed medications are taken in a timely manner and at the correct dosage. Briefly, individual pills are provided with miniature radio frequency identification (RFID) devices capable of transmitting RFID tag signals, which identify the medication contained within the pill and its dosage. The implanted device is equipped with an RFID transceiver for receiving tag signals from a pill as it is being ingested. The implanted system decodes the tag to identify the medication and its dosage, then accesses an onboard database to verify that the medication being ingested was in fact prescribed to the patient and to verify that the correct dosage was taken. Warning signals are generated if the wrong medication or the wrong dosage was taken. Therapy may also be automatically adjusted. Non-RF-based ID devices are also described, which instead transmit ID data via biphasic current pulses.
Owner:PACESETTER INC
MRI Compatible Leadless Cardiac Pacemaker
InactiveUS20110077708A1Maintain safe operationEpicardial electrodesHeart stimulatorsPower flowPath length
An implantable battery powered leadless pacemaker or biostimulator is provided that may include any of a number of features. One feature of the biostimulator is that it safely operates under a wide range of MRI conditions. One feature of the biostimulator is that it has a total volume small enough to avoid excessive image artifacts during a MRI procedure. Another feature of the biostimulator is that it has reduced path lengths between electrodes to minimize tissue heating at the site of the biostimulator. Yet another feature of the biostimulator is that a current loop area within the biostimulator is small enough to reduce an induced current and voltage in the biostimulator during MRI procedures. Methods associated with use of the biostimulator are also covered.
Owner:NANOSTIM
Leadless Cardiac Pacemaker with Anti-Unscrewing Feature
ActiveUS20120116489A1Prevent disengagementPreventing unintentional detachmentInternal electrodesExternal electrodesCardiac pacemaker electrodeElectrical impulse
A leadless cardiac pacemaker comprises a housing, a plurality of electrodes coupled to an outer surface of the housing, and a pulse delivery system hermetically contained within the housing and electrically coupled to the electrode plurality, the pulse delivery system configured for sourcing energy internal to the housing, generating and delivering electrical pulses to the electrode plurality. The pacemaker further comprises an anti-unscrewing feature disposed on either a fixation device of the pacemaker or on the housing itself. The anti-unscrewing feature can be configured to prevent the fixation device from disengaging the wall of the heart.
Owner:PACESETTER INC
High frequency wireless pacemaker
InactiveUS7289853B1High-frequency operationLow pacemaker power consumptionHeart stimulatorsCommunications systemCardiac pacemaker electrode
A wireless communications system optimizes performance by dividing communications functionality between a wireless pacemaker and a wireless monitoring base station according to the design constraints imposed by the system elements. Typical design constraints include high frequency operation, low pacemaker power consumption, reasonable range, high data rate, minimal RF radiation of internal circuitry, small pacemaker antenna system, simple pacemaker RF circuit design, high reliability, low pacemaker cost, and use of existing pacemaker construction methodologies.
Owner:CAMPBELL DAVID +1
Methods and apparatus for controlling a pacing system in the presence of EMI
ActiveUS20030144705A1Generate accuratelyHeart stimulatorsDiagnostic recording/measuringCardiac pacemaker electrodeElectromagnetic interference
Pacing systems are disclosed including detectors for detecting the presence of electromagnetic interference and setting an interference state pacing mode and pacing rate. The interference state pacing mode and pacing rate are altered as a function of patient pacemaker dependency and the prevailing mean heart rate. When pacemaker dependency exists, the pacing rate is maintained and even increased from the prevailing mean heart for the duration of the interference state. When the patient is determined to not be pacemaker dependent, pacing is inhibited or suspended for the duration of the interference state.
Owner:MEDTRONIC INC
Self-powered leadless pacemaker
InactiveUS20070276444A1Minimize interferenceImprove compression performanceElectrotherapyCardiac pacemaker electrodeEngineering
A self-powered pacemaker uses the variations of blood pressure inside the heart or a major artery to create a periodic change in the magnetic flux inside a coil. The pressure variations compress a bellows carrying a magnet moving inside a coil. The inside of the bellows is evacuated to a partial or full vacuum, and a spring restores the bellows to the desired equilibrium point, acting against the blood pressure. The current pulses are stored in a capacitor. Eliminating the battery allows dramatic miniaturization of the pacemaker to the point it can be implanted at the point of desired stimulation via a catheter. The invention includes means of compensating for atmospheric pressure changes.
Owner:LG RES PARTNERSHIP
Leadless cardiac pacemaker with secondary fixation capability
ActiveUS8527068B2Discourage attachment and colonization of surfaceImprove capture abilityElectrotherapyArtificial respirationTrabeculae carneaeCardiac pacemaker electrode
Owner:PACESETTER INC
Leadless Cardiac Pacemaker with Secondary Fixation Capability
ActiveUS20100198288A1Discourage attachment and colonization of surfaceImprove capture abilityHeart stimulatorsTrabeculae carneaeCardiac pacemaker electrode
The invention relates to leadless cardiac pacemakers (LBS), and elements and methods by which they affix to the heart. The invention relates particularly to a secondary fixation of leadless pacemakers which also include a primary fixation. Secondary fixation elements for LBS's may passively engage structures within the heart. Some passive secondary fixation elements entangle or engage within intraventricular structure such as trabeculae carneae. Other passive secondary fixation elements may engage or snag heart structures at sites upstream from the chamber where the LBS is primarily affixed. Still other embodiments of passive secondary fixation elements may include expandable structures.
Owner:PACESETTER INC
Method and apparatus for treating hemodynamic disfunction
A method of treating hemodynamic disfunction by simultaneously pacing both ventricles of a heart. At least one ECG amplifier is arranged to separately detect contraction of each ventricle and a stimulator is then activated for issuing stimulating pulses to both ventricles in a manner to assure simultaneous contraction of both ventricles, thereby to assure hemodynamic efficiency. A first ventricle is stimulated simultaneously with contraction of a second ventricle when the first fails to properly contract. Further, both ventricles are stimulated after lapse of a predetermined A-V escape interval. One of a pair of electrodes, connected in series, is placed through the superior vena cava into the right ventricle and a second is placed in the coronary sinus about the left ventricle. Each electrode performs both pacing and sensing functions. The pacer is particularly suitable for treating bundle branch blocks or slow conduction in a portion of the ventricles.
Owner:MIROWSKI FAMILY VENTURES LLC
Electrical system for weight loss and laparoscopic implanation thereof
InactiveUS6564101B1Avoid necessityEasy to deployInternal electrodesExternal electrodesElectricityCardiac pacemaker electrode
An electrical device utilized to control the body weight of a medically overweight human being comprises of at least two electrical leads for implanting on the fundus of the stomach. An electrical generator / controller (pacemaker) generates and regulates the frequency and degree of electrical stimulation. The device can be used surgically, laproscopically, and / or endoscopically.
Owner:ZIKRIA BASHIR A
System and method for atrial autocapture in single-chamber pacemaker modes using far-field detection
InactiveUS6101416AReduce noiseReduce signalingHeart stimulatorsDiagnostic recording/measuringCardiac pacemaker electrodeSingle Chamber Pacemaker
An implantable pacemaker automatically verifies atrial capture and performs atrial stimulation energy assessment when atrial capture is absent. The pacemaker delivers a stimulation pulse in the atrial chamber of the heart and samples the resulting far-field signal from the ventricular chamber during a predetermined far-field interval window. The pacemaker then compares the far-field signal sample to a predetermined far-field signal recognition template. If the far-field signal sample is approximately equal to the far-field signal recognition template, then atrial capture is deemed verified; otherwise, the pacemaker performs an atrial stimulation energy determination. Optionally, the pacemaker automatically determines the timing of the far-field interval window and defines the far-field signal recognition template.
Owner:PACESETTER INC
Remotely enabled pacemaker and implantable subcutaneous cardioverter/defibrillator system
ActiveUS7991467B2Relieve painSafe and effective operationCatheterHeart stimulatorsCardiac pacemaker electrodeImplantable cardioverter-defibrillator
Subcutaneous Implantable cardioverter-defibrillators (SubQ ICDs) are disclosed that are entirely implantable subcutaneously with minimal surgical intrusion into the body of the patient and provide distributed cardioversion-defibrillation sense and stimulation electrodes for delivery of cardioversion-defibrillation shock and pacing therapies across the heart when necessary. The SubQ ICD is implemented with other implantable and external medical devices and communicates to provide drugs and therapy in a coordinated and synergistic manner.
Owner:MEDTRONIC INC
Method, apparatus and product for acquiring cardiac images
ActiveUS7454248B2Ultrasonic/sonic/infrasonic diagnosticsElectrotherapyCardiac pacemaker electrodeSignal injection
A method for acquiring cardiac information from a patient having a pacer for pacing a heart rhythm, an abnormal EKG, or an abnormal heartbeat is disclosed. The method includes: placing a signal injection device proximate the pacer of the patient and injecting a signal across a skin barrier of the patient toward the pacer; in response to the signal received at the pacer, pacing the patient's heart in a fixed asynchronous pacing mode; and, acquiring cardiac information relating to the patient's fixed asynchronously paced heart.
Owner:GE MEDICAL SYST GLOBAL TECH CO LLC +1
System and method for communicating information using encoded pacing pulses within an implantable medical system
InactiveUS7630767B1Facilitate communicationHeart stimulatorsCardiac pacemaker electrodeLeft ventricular size
Techniques are provided for delivering cardiac pacing therapy to the heart of a patient using an epicardial left ventricular satellite pacing device in conjunction with primary pacemaker having at least a right ventricular pacing lead. In one embodiment described herein, right ventricular pulses generated by the primary pacemaker are detected by the satellite pacer and analyzed to determine the timing pattern employed by the primary pacemaker. The timing pattern is then used to specify the delivery times of epicardial left ventricular pulses so as to be synchronized with right ventricular pulses. In another embodiment described herein, the primary pacemaker modulates the right ventricular pulses to encode timing information, which is then detected and decoded by the satellite pacemaker. In this manner, biventricular pacing therapy, such as cardiac resynchronization therapy, may be conveniently delivered using a non-biventricular pacemaker in combination with an epicardial satellite pacer.
Owner:PACESETTER INC
Wavelet based feature extraction and dimension reduction for the classification of human cardiac electrogram depolarization waveforms
ActiveUS20080109041A1Improve accuracyPrecise processElectrocardiographyMedical automated diagnosisCardiac pacemaker electrodeClassification methods
A depolarization waveform classifier based on the Modified lifting line wavelet Transform is described. Overcomes problems in existing rate-based event classifiers. A task for pacemaker / defibrillators is the accurate identification of rhythm categories so correct electrotherapy can be administered. Because some rhythms cause rapid dangerous drop in cardiac output, it's desirable to categorize depolarization waveforms on a beat-to-beat basis to accomplish rhythm classification as rapidly as possible. Although rate based methods of event categorization have served well in implanted devices, these methods suffer in sensitivity and specificity when atrial / ventricular rates are similar. Human experts differentiate rhythms by morphological features of strip chart electrocardiograms. The wavelet transform approximates human expert analysis function because it correlates distinct morphological features at multiple scales. The accuracy of implanted rhythm determination can then be improved by using human-appreciable time domain features enhanced by time scale decomposition of depolarization waveforms.
Owner:BIOTRONIK SE & CO KG
Leadless Cardiac Pacemaker with Integral Battery and Redundant Welds
ActiveUS20130123875A1ElectrotherapyLaser beam welding apparatusCardiac pacemaker electrodeCardiac pacemaker
A leadless cardiac pacemaker that does not require a separate hermetic housing surrounding the battery and electronics compartments is provided. The cardiac pacemaker can include a battery disposed in a battery housing and a set of electronics disposed in an electronics housing. In some embodiments, the battery housing and the electronics housing can comprise an external surface of the pacemaker. The pacemaker can include a first set of welds separating the battery from the set of electronics, and a second set of welds separating the set of electronics and the battery from an exterior of the housing. Various embodiments for achieving dual-redundant welds are also provided.
Owner:PACESETTER INC
Optimization of impedance signals for closed loop programming of cardiac resynchronization therapy devices
What are described herein are implantable cardiac devices such as pacemakers and defibrillators that deliver cardiac resynchronization therapy (CRT), and to a method of optimizing acquisition of impedance signals between electrodes present on implanted lead systems. This system then automatically determines which electrodes or electrode combinations acquire impedance waveforms that have the best signal to noise ratio (highest fidelity) and characterize data most representative of dysynchronous electro-mechanical events. Using closed loop algorithms which provide electrograms and a variety of impedance data reflective of the patient's clinical status, the system autonomously modifies interval timing within the CRT device.
Owner:PACESETTER INC
Implantable Stimulation Electrode with a Coating for Increasing Tissue Compatibility
InactiveUS20080234790A1Avoid tissue irritationGood biocompatibilitySurgeryInternal electrodesImplantable Stimulation ElectrodesIrritation
An implantable stimulation electrode for use with an implantable tissue stimulator, especially a pacemaker, a defibrillator, a bone stimulator or a neurostimulator includes a metal base body, optionally one or more intermediate layers disposed on the base body and a coating covering the base body and, optionally, intermediate layers in order to increase tissue compatibility. The coating should prevent tissue irritations after implantation and more particularly increase the stimulus threshold associated therewith, have very high biocompatibility and also has an anti-inflammatory effect. An increase in tissue compatibility is achieved by virtue of the fact that the coating has a polysaccharide layer made of hyaluronic acid and / or hyaluronic acid derivatives.
Owner:BIOTRONIK MESS UND THERAPIEGERAETE GMBH & CO
Non-electrode-lead ultra-thin flexible micro multifunctional heart rate adjusting device
InactiveUS20100094367A1Extended service lifeSmall sizeHeart defibrillatorsHeart stimulatorsMicrocomputerMedicine
A non-electrode-lead ultra-thin flexible micro multifunctional heart rate adjusting device comprises an integrative ultra-thin flexible micro non-electrode-lead pacemaker formed by assembling a micro battery, an ultra-low-power source circuit, a wireless receiving / transmitting circuit and an application circuit unit together, the needle electrodes are positioned on one side of the pacemaker and all of them form a small electrode body which can directly implanted into heart or external surface of heart; a multifunctional microcomputer heart rate adjusting remote controller connects with various non-electrode-lead pacemakers via wireless communication; the non-electrode-lead pacemakers and / or the heart rate adjusting remote controller connect with a control base station via wireless network, and the control base station connects with a computer.
Owner:SEN LUYI
Method and apparatus for monitoring ingestion of medications using an implantable medical device
InactiveUS20080288027A1Reduce the possibilityIncrease chances of survivalDrug and medicationsSurgeryTransceiverCardiac pacemaker electrode
An implantable medical device, such as a pacemaker or implantable cardioverter defibrillator (ICD), is configured to automatically detect ingestion of medications to verify that prescribed medications are taken in a timely manner and at the correct dosage. Briefly, individual pills are provided with miniature radio frequency identification (RFID) devices capable of transmitting RFID tag signals, which identify the medication contained within the pill and its dosage. The implanted device is equipped with an RFID transceiver for receiving tag signals from a pill as it is being ingested. The implanted system decodes the tag to identify the medication and its dosage, then accesses an onboard database to verify that the medication being ingested was in fact prescribed to the patient and to verify that the correct dosage was taken. Warning signals are generated if the wrong medication or the wrong dosage was taken. Therapy may also be automatically adjusted. Non-RF-based ID devices are also described, which instead transmit ID data via biphasic current pulses.
Owner:PACESETTER INC
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