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Surgery: Light, Thermal, And Electrical Application > Light, Thermal, And Electrical Application > Electrical Therapeutic Systems > Heart Rate Regulating (e.g., Pacing) > Parameter Control In Response To Sensed Physiological Load On Heart Parameter Control In Response To Sensed Physiological Load On HeartParameter Control In Response To Sensed Physiological Load On Heart patent applications listed are from June 2005 to current and include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.12/07/06 - 20060276848 - Evoked response and impedance measures for monitoring heart failure and respiration An exemplary method includes acquiring impedance values over one or more respiratory cycles, determining an impedance span based on the impedance values and, based at least in part on the impedance span, determining cardiac condition or respiratory condition. Another exemplary method includes acquiring IEGMs over one or more respiratory cycles, ... 11/30/06 - 20060271121 - Closed loop impedance-based cardiac resynchronization therapy systems, devices, and methods This document discusses, among other things, systems, devices, and methods measure an impedance and, in response, adjust an atrioventricular (AV) delay or other cardiac resynchronization therapy (CRT) parameter that synchronizes left and right ventricular contractions. A first example uses parameterizes a first ventricular volume against a second ventricular volume during ... 11/09/06 - 20060253160 - Devices and methods for detecting and treating inadequate tissue perfusion Devices and methods for detecting inadequate tissue perfusion by measuring a parameter other than heart rate such as vascular blood pressure, intracardiac blood pressure, vascular blood flow or tissue perfusion, in addition to or as a substitute for heart rate. Such devices and methods improve the accuracy of determining when ... 11/09/06 - 20060253159 - Trending of systolic murmur intensity for monitoring cardiac disease with implantable device Described is an implantable device configured to monitor for changes in the intensity and/or duration of a systolic murmur such as mitral regurgitation by means of an acoustic sensor. Such changes may be taken to indicate a change in a patient's heart failure status. Upon detection of a worsening in ... 11/02/06 - 20060247704 - Self-calibrating rate-adaptive pacemaker A system and method for automatically adjusting the operating parameters of a rate-adaptive cardiac pacemaker. In accordance with the method, maximum exertion levels attained by the patient are measured at periodic intervals and stored. The stored maximum exertion levels may then be used to update a long-term maximal exertion level, ... 11/02/06 - 20060247703 - Method and apparatus for discriminating ventricular and supraventricular tachyarrhythmias A system and method are provided for discriminating supra-ventricular tachycardia (SVT) from ventricular tachycardia (VT). A monitoring EGM signal is acquired during a sensing window timed according to the time of R-wave detection on a reference EGM signal. A normal sinus rhythm (NSR) template is generated using the monitoring EGM ... 11/02/06 - 20060247702 - Measurement of coronary sinus parameters to optimize left ventricular performance In some embodiments, an implantable medical device (IMD) system may include one or more of the following elements: (a) an oxygen sensor for measuring oxygen extraction from blood flowing through a coronary sinus of a patient's heart, (b) an oxygen signal generated by the oxygen sensor, (c) an IMD coupled ... 10/26/06 - 20060241708 - Multiple sensors for sleep apnea with probability indication for sleep diagnosis and means for automatic activation of alert or therapy An apparatus and method for detecting respiratory disturbances based on multiple physiological parameters are provided. The method includes sensing one or more physiological signals, deriving from the sensed signals multiple physiological parameters that change during a respiratory disturbance, computing a probability that the respiratory disturbance is present using the multiple ... 10/26/06 - 20060241707 - System and method for breaking reentry circuits by cooling cardiac tissue Systems and methods to inhibit the conduction of certain spurious electrical impulses in the heart. Inhibition of spurious electrical impulses in the heart is accomplished by cooling one or more targeted portions of the heart. Optionally, inhibition of spurious electrical impulses may be accomplished by cooling of cardiac tissue in ... 10/05/06 - 20060224202 - System to treat av-conducted ventricular tachyarrhythmia Various aspects of the present subject matter provide devices and methods to treat AV-conducted ventricular tachyarrhythmia (AVCVT). According to various embodiments of the method, an AVCVT is sensed, an IVC-LA fat pad is stimulated when the AVCVT is sensed to block AV conduction, and bradycardia support pacing is provided while ... 10/05/06 - 20060224201 - System and method for using atrial pacing to enhance function of stunned atrial myocardium following conversion to normal sinus rhythm An implantable medical device (IMD) includes a therapy circuit for delivering atrial pacing and a control circuit for detecting a return to sinus rhythm, determining the duration of atrial arrhythmia preceding the return to sinus rhythm, and controlling the therapy circuit to deliver transient atrial pacing based on the duration. ... 09/14/06 - 20060206158 - Implantable vagal stimulator for treating cardiac ischemia A device and method for treating cardiac ischemia with vagal stimulation is disclosed. In one embodiment, an implantable device is configured to deliver vagal stimulation upon obtaining an indication of cardiac ischemia by analysis of a recorded electrogram. ... 09/14/06 - 20060206157 - Heart stimulator detecting atrial arrhythmia by determing wall distension by impedance measuring In an implantable pacemaker, pacing pulses are delivered to a ventricle in a P-wave synchronous mode as long as no atrial arrhythmia is detected, pacing pulses and a mode switch is made to deliver pacing pulses to the ventricle in a non-P-wave synchronous mode if atrial arrhythmia is detected. From ... 08/31/06 - 20060195150 - Cardiac pacing system for prevention of ventricular fibrillation and ventricular tachycardia episode A cardiac pacing system preventing short-long-short pacing sequences. The system providing pacing pulses where necessary. The system having dynamic event window generation to adapt to changes in heart rate. The event window adaptable to process a number of intervals. The system including provisions for other inputs, such as sensor and ... 08/24/06 - 20060190045 - Optimization method for cardiac resynchronization therapy The patterns of contraction and relaxation of the heart before and during left ventricular or biventricular pacing are analyzed and displayed in real time mode to assist physicians to screen patients for cardiac resynchronization therapy, to set the optimal AN or right ventricle to left ventricle interval delay, and to ... 07/27/06 - 20060167515 - Apparatus, software, and methods for cardiac pulse detection using a piezoelectric sensor Signal data obtained from a piezoelectric sensor placed on a patient's body is used to detect the presence of a cardiac pulse. The piezoelectric sensor has a transducing element adapted to sense movement due to a cardiac pulse and produce piezoelectric signal data in response thereto. Processing circuitry analyzes the ... 07/27/06 - 20060167514 - System and method for monitoring myocardial performance using sensed ventricular pressures A medical device chronically monitors cardiac function in a patient. An input circuit of the medical device receives a pressure signal representative of a pressure sensed within a ventricle of the patient's heart as a function of time. A processor derives from the pressure signal a myocardial performance index based ... 07/27/06 - 20060167513 - Implantable medical device with ventricular pacing protocol for sleep state A Ventricular Pacing Protocol (VPP) is provided that reduces ventricular pacing. The VPP has varying levels of aggressiveness that are more or less tolerant of an absence of intrinsic ventricular activity within a given interval. During periods of sleep, the VPP is adjusted to a more aggressive level to further ... 07/20/06 - 20060161210 - Method and apparatus for using heart rate variability to control maximum tracking rate in pacing therapy A cardiac rhythm management system modulates the delivery of pacing and/or autonomic neurostimulation pulses based on heart rate variability (HRV). An HRV parameter being a measure of the HRV is produced to indicate a patient's cardiac condition, based on which the delivery of pacing and/or autonomic neurostimulation pulses is started, ... 07/20/06 - 20060161209 - Method and apparatus for using heart rate variability as a safety check in electrical therapies A cardiac rhythm management system modulates the delivery of pacing and/or autonomic neurostimulation pulses based on heart rate variability (HRV). An HRV parameter being a measure of the HRV is produced to indicate a patient's cardiac condition, based on which the delivery of pacing and/or autonomic neurostimulation pulses is started, ... 07/20/06 - 20060161208 - Method and apparatus for optimizing electrical stimulation parameters using heart rate variability A cardiac rhythm management system modulates the delivery of pacing and/or autonomic neurostimulation pulses based on heart rate variability (HRV). An HRV parameter being a measure of the HRV is produced to indicate a patient's cardiac condition, based on which the delivery of pacing and/or autonomic neurostimulation pulses is started, ... 07/06/06 - 20060149326 - Intermittent stress augmentation pacing for cardioprotective effect A device and method for delivering electrical stimulation to the heart in a manner which provides a protective effect against subsequent ischemia is disclosed. The protective effect is produced by configuring a cardiac pacing device to intermittently switch from a normal operating mode to a stress augmentation mode in which ... 06/15/06 - 20060129195 - Cardiac pacing response classification based on waveform feature variability Methods and systems involve determining the cardiac response to pacing pulses. The variability cardiac signal features detected during initialization is used to establish a variability threshold. A cardiac signal associated with a pacing pulse is sensed and one or more features of the cardiac signal are detected. The variability of ... 06/15/06 - 20060129194 - Cardiac pacing response classification using an adaptable classification interval Methods and systems involve the formation of a classification interval used for sensing a cardiac signal following a pacing pulse to determine a cardiac response to pacing. One or more cardiac signals associated with a type of cardiac pacing response are sensed. The timing of at least one feature of ... 06/01/06 - 20060116731 - Method and apparatus for quantification of cardiac wall motion asynchrony A phase analysis technique provides for quantification of regional wall motion asynchrony from endocardial border contours generated from two-dimensional echocardiographic ventricular images. The technique produces results including a degree of radial ventricular asynchrony in heart failure patients with ventricular conduction delay to predict a magnitude of contractile function improvement with ... 06/01/06 - 20060116730 - Method and apparatus for determining oversensing in a medical device A method and apparatus for determining oversensing in an implantable medical device that includes sensing a first cardiac signal and detecting cardiac events via a first electrode configuration, determining the presence of an episode requiring therapy in response to the detected cardiac events, sensing the first cardiac signal via a ... 05/04/06 - 20060095085 - Accelerometer-based method for cardiac function and therapy assessment A method for determining a change in function of a patient's heart that includes the steps of collecting seismocardiographic (SCG) data corresponding to a heart motion of the patient's heart; determining a hemodynamic parameter based on the SCG data; and comparing the parameter with a predetermined measure of cardiac performance. ... 04/27/06 - 20060089677 - Self limited rate response Rate responsive pacing is limited in an atrial based pacing mode by the AV interval in order to avoid or minimize ventricular encroachment of atrial pacing. The AV or VA interval is used to permit rate responsiveness; modulate rate responsiveness or to determine a dynamic upper sensor rate. ... 04/13/06 - 20060079942 - Software configurable medical device platform and associated methods The invention relates to medical devices such as pacemakers, pulse generators, cardioverter-defibrillators and the like and more particularly relates to modular and reconfigurable medical system platforms and methods of designing, testing, controlling and implementing diverse therapies, diagnostics, physiologic sensors and related instrumentation using said medical system platforms. Methods, systems and ... 03/23/06 - 20060064135 - Implantable pressure sensor with pacing capability Devices and methods for left ventricular or biventricular pacing plus left ventricular pressure measurement. For example, a pacing lead having a combined electrode and pressure sensor assembly may be used for left ventricular (LV) pacing and pressure measurement. The assembly may include one or more electrodes, a pressure sensor, and ... 03/23/06 - 20060064134 - Systems and methods for deriving relative physiologic measurements One embodiment of the present invention relates to a system for deriving physiologic measurement values that are relative to ambient conditions. In one embodiment, the system comprises an implantable medical device (“IMD”) and an external monitor. The IMD is adapted to determine an absolute physiologic parameter value within a patient's ... 03/23/06 - 20060064133 - System and method for deriving relative physiologic measurements using an external computing device One embodiment of the present invention relates to a system for deriving physiologic measurement values that are relative to ambient conditions. In one embodiment, the system comprises an implantable medical device (“IMD”) and an external computing device. The IMD is operable to determine an absolute physiologic parameter value within a ... 02/23/06 - 20060041280 - Thoracic impedance detection with blood resistivity compensation This document discusses, among other things, a cardiac rhythm management device or other implantable medical device that uses thoracic impedance to determine how much fluid is present in the thorax, such as for detecting or predicting congestive heart failure, pulmonary edema, pleural effusion, hypotension, or the like. The thoracic fluid ... 02/16/06 - 20060036291 - Automatic post-pacing interval measurement A method for processing a biopotential signal includes detecting a pacing signal, and applying a dynamic filter on a pacing channel based on the detected pacing signal. A method for processing a biopotential signal includes detecting a pacing signal, and automatically obtaining a post-pacing interval based at least in part ... 02/16/06 - 20060036290 - Cardiopulmonary functional status assessment via metabolic response detection by implantable cardiac device An implantable cardiac device is configured and programmed to assess a patient's cardiopulmonary function by evaluating the patient's minute ventilation response. Such evaluation may be performed by computing a minute ventilation response slope, defined as the ratio of an incremental change in minute ventilation to an incremental change in measured ... 02/02/06 - 20060025827 - Apparatus and method for detecting lung sounds using an implanted device Adventitious lung sounds indicative of lung congestion are detected using an implantable sensor. The sensor is adapted to be positioned adjacent to a pulmonary system and to output signals indicative of lung sounds in response to pulmonary system activity. A controller receives the signals and processes the signals to detect ... 01/26/06 - 20060020295 - Method and apparatus for monitoring heart failure patients with cardiopulmonary comorbidities A system receives signals indicative of cardiopulmonary conditions sensed by a plurality of sensors and provides for monitoring and automated differential diagnosis of the cardiopulmonary conditions based on the signals. Cardiogenic pulmonary edema is detected based on one or more signals sensed by implantable sensors. If the cardiogenic pulmonary edema ... 01/26/06 - 20060020294 - Method and apparatus for optimization of cardiac resynchronization therapy using heart sounds A cardiac rhythm management system provides for assessment of cardiac mechanical dyssynchrony based on heart sound morphology and optimization of pacing parameters based on the effect of pacing on the cardiac mechanical dyssynchrony assessment. A degree of cardiac mechanical dyssynchrony is measured by the time delay between tricuspid valve closure ... 01/12/06 - 20060009811 - Ischemia detection Techniques for detection and treatment of myocardial ischemia are described that monitor both the electrical and dynamic mechanical activity of the heart to detect and verify the occurrence of myocardial ischemia in a more reliable manner. The occurrence of myocardial ischemia can be detected by monitoring changes in an electrical ... 01/12/06 - 20060009810 - Method for detecting, diagnosing, and treating cardiovascular disease A method of treating cardiovascular disease in a medical patient is provided. The method includes the steps of generating a sensor signal indicative of a fluid pressure within the left atrium of the patient's heart, and delivering an electrical stimulus to a location in the heart. The electrical stimulus is ... 12/29/05 - 20050288726 - Method and device for using impedance measurements based on electrical energy of the heart A method and a device are disclosed for evaluating the cardio-circulatory and pulmonary condition of a patient, including determining the patient's thoracic impedance based on information solely derived from the electrical energy generated by the patient's own heart. ... 12/29/05 - 20050288725 - Combination of electrogram and intra-cardiac pressure to discriminate between fibrillation and tachycardia A system and method for detecting and classifying cardiac arrhythmias based on cardiac pressure signals or the combination of cardiac electrical and cardiac pressure signals. A cardiac electrogram signal is sensed to derive a cardiac rate from which an arrhythmia detection is made when the cardiac rate meets arrhythmia detection ... 12/22/05 - 20050283197 - Systems and methods for hypotension This document discusses, among other things, systems and methods that detect hypotension based on a measurement of thoracic impedance. It also provides an alert, a logging, or a therapy to treat the hypotension. Examples of anti-hypotension therapies include, among other things, pacing therapy, neural stimulation therapy, drug infusion therapy, or ... 12/01/05 - 20050267542 - Techniques for applying, configuring, and coordinating nerve fiber stimulation Apparatus is provided including an implantable sensor, adapted to sense an electrical parameter of a heart of a subject, and a first control unit, adapted to apply pulses to the heart responsively to the sensed parameter, the pulses selected from the list consisting of: pacing pulses and anti-arrhythmic energy. The ... 12/01/05 - 20050267541 - Chronotropic status monitor for implantable cardiac device An implantable cardiac device with an exertion level sensor is programmed to determine a heart rate appropriate for a given measured exertion level in accordance with a physiological model and/or previously collected physiologic data. The device then compares the model's heart rate with a measured intrinsic heart rate. Based upon ... 11/17/05 - 20050256545 - System and method for evaluating heart failure using an implantable medical device based on heart rate during patient activity Techniques are provided for detecting and tracking heart failure based on heart rate, rest rate and activity levels. Briefly, histograms are generated based on rest-rate adjusted heart rate values and corresponding activity level values. Heart failure is then detected and tracked based on an analysis of the histogram. In one ... 11/10/05 - 20050251218 - Implantable medical device with circulation delay measurement and therapy control Oxygen saturation data is monitored during a predefined window to obtain a measurement of circulation delay. The measured circulation delay is used as a basis for determining therapies, including overdrive pacing. In some embodiments, circulation delay is used to identify patients that will benefit from overdrive pacing as a therapy ... 11/03/05 - 20050245981 - Pacemaker evaluation method and apparatus A method of optimizing the performance of a cardiac prosthetic pacing device including monitoring, optionally transcutaneously or non-invasively, the flow output from the heart; optionally using a continuous wave Doppler ultrasound device, followed by adjusting the timing of said cardiac prosthetic pacing device so as to optimize the flow from ... 09/29/05 - 20050216067 - System and method for predicting a heart condition based on impedance values using an implantable medical device Techniques are provided for predicting the onset of a heart condition within a patient based on impedance measurements. Briefly, overloads in fluid levels in the thorax and in ventricular myocardial mass within the patient are detected based on impedance signals sensed using implanted electrodes. The onset of certain heart conditions ... 09/22/05 - 20050209649 - Mechanical sensing system for cardiac pacing and/or for cardiac resynchronization therapy According to the present invention a sensing means is provided for chronically measuring and/or sensing contractions of a right ventricle (RV) and/or a left ventricle (LV). The sensing means can include a tensiometric sensor, a single or a multiple axis accelerometer to measure peak endocardial acceleration due to atrial and ... 09/08/05 - 20050197676 - Electrical cardiac output forcer An electrical method and apparatus for stimulating cardiac cells causing contraction to force hemodynamic output during fibrillation, hemodynamically compromising tachycardia, or asystole. Forcing fields are applied to the heart to give cardiac output on an emergency basis until the arrhythmia ceases or other intervention takes place. The device is used ... 07/28/05 - 20050165454 - Method and apparatus for optimizing cardiac resynchronization therapy A method and apparatus for optimizing cardiac resynchronization therapy are provided. An iterative optimization procedure is performed to test the systolic hemodynamic effects of varying A-V-V timing schemes. The hemodynamic effect is assessed based on a surrogate of stroke volume. The stroke volume surrogate is derived from a sensor signal ... 07/14/05 - 20050154422 - Method and apparatus for the setting or adjustment of a cardiac pacemaker A method of setting or adjusting a cardiac pacemaker in a patient diagnosed with cardiac asynchrony, which method comprises the steps of: i) implanting cardiac pacing wires into at least the right ventricle and the left ventricle of the heart of the patient, ii) continuously monitoring and recording the cardiac ... 07/07/05 - 20050149136 - Third heart sound activity index for heart failure monitoring A cardiac rhythm management system provides for the trending of a third heart sound (S3) index. The S3 index is a ratio, or an estimate of the ratio, of the number of S3 beats to the number of all heart beats, where the S3 beats are each a heart beat ... 06/23/05 - 20050137635 - Adjusting the maximum ventricular stimulation frequency according to the hemodynamic state of the patient in an active implantable medical device Adjusting the maximum ventricular stimulation frequency according to the hemodynamic state of the patient in an active implantable medical device. This device provides for limiting ventricular stimulation to a maximum frequency (Fmax), the rate of delivery of the stimulation pulses, measuring an intracardiac bio-impedance (Zn, Zn+1), and adjusting the maximum ... 06/09/05 - 20050125042 - Implantable heart stimulating device, a system including such a device and a manner of using the system In an implantable heart stimulating device, system and method, electrical stimulation pulses are delivered to first and second ventricles of a heart with a variable time interval therebetween, and signals are sensed at two different positions in the heart, from which an impedance value is derived. A minimum value and ... 06/02/05 - 20050119708 - Subcutaneous cardiac signal discrimination employing non-electrophysiologic signal A cardiac monitoring and/or stimulation system includes a housing coupled to a plurality of electrodes configured for subcutaneous non-intrathoracic sensing. A signal processor receives a plurality of composite signals associated with a plurality of sources, separates a signal from the plurality of composite signals, and identifies the separated signal as ... ### FreshPatents.com Support |