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"I watched his countenance closely, to see if he was not deranged ... and I was assured by other senators after he left the room that they had no confidence in it."
U.S. Senator Smith of Indiana ; After seeing Samuel Morse demonstrate the telegraph.
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| Number | Title | Issue Date |
| 8175707 | Enhancement of rate responsive IEGM-based AV/PV and VV delay algorithms An exemplary method includes delivering a cardiac resynchronization therapy using an atrio-ventricular delay and an interventricular delay, monitoring patient activity, optimizing the atrio-ventricular delay and the interventricular delay for a plurality of patient ... | 05/08/2012 |
| 8145306 | Method for optimizing CRT therapy A method to optimize CRT therapy using ventricular lead motion analysis, either radiographically or with three dimensional electromagnetic mapping, to determine whether focal dyssynchrony is present at baseline, and whether biventricular pacing improves synchronicit... | 03/27/2012 |
| 8140158 | Heart monitoring device and a system to detect vibrations concerning the status of the heart An implantable heart monitoring system has a control circuit that operates an implanted vibrator to emit a vibration signal that interacts with tissue in vivo. A vibration sensor detects vibrations after interaction with the tissue, and supplies a detection signal t... | 03/20/2012 |
| 8126553 | Sensing integrity determination based on cardiovascular pressure Electrical noise may be discriminated from sensed heart signals based on cardiovascular pressure. A plurality of detected cardiovascular pressure values are respectively associated with a plurality of detected tachyarrhythmia events. In some examples, a variance in ... | 02/28/2012 |
| 8073540 | Implantable heart stimulating device with stimulation rate optimization An implantable heart stimulating device has a stimulation pulse generator that emits stimulation pulses at an adjustable stimulation rate, an activity sensor that emits an activity signal in response to detected activity of the patient, and a physiological parameter... | 12/06/2011 |
| 8065003 | Demand-based cardiac function therapy A method and device for delivering cardiac function therapy on a demand basis. An implantable device for delivering cardiac function therapy is programmed to suspend such therapy at periodic intervals or upon command from an external programmer. Measurements related... | 11/22/2011 |
| 8014863 | Heart attack or ischemia detector A system including an implantable trigger event detector and an implantable ischemia detector. The implantable trigger event detector is adapted to detect at least one first condition and to output a responsive trigger signal including information about whether the ... | 09/06/2011 |
| 8014864 | Cardiomechanical assessment for cardiac resynchronization therapy A first lead provides therapeutic stimulation to the heart and includes a first mechanical sensor that measures physical contraction and relaxation of the heart. A controller induces delivery of therapeutic stimulation via the first lead. The controller receives sig... | 09/06/2011 |
| 7953487 | Heart stimulating device An implantable heart stimulating device for indicating congestive heart failure (CHF) has a processor, an activity sensor that generates an activity signal indicative of a patient's activity, and a blood temperature sensor that measures blood temperature inside the ... | 05/31/2011 |
| 7953486 | Maximum pacing rate limiter implemented using the evoked response—T-wave interval A maximum pacing rate limiter for use in adaptive rate pacing in conjunction with a cardiac rhythm management system for a heart. The maximum pacing rate limiter may function to measure an interval, termed the ERT interval, between a paced ventricular evoked respons... | 05/31/2011 |
| 7904158 | 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 b... | 03/08/2011 |
| 7844334 | Dual-use sensor for rate responsive pacing and heart sound monitoring An implantable medical device includes a dual-use sensor such as a single accelerometer that senses an acceleration signal. A sensor processing circuit processes the acceleration signal to produce an activity level signal and a heart sound signal. The implantable me... | 11/30/2010 |
| 7844335 | Implantable medical device and method for LV coronary sinus lead implant site optimization A device is connected to electrode leads which performs intracardiac impedance measurements, conducts a transient pacing protocol, analyses the impedance measurements, and generates an LV lead position quality factor. The transient pacing protocol includes a repeate... | 11/30/2010 |
| 7783353 | Automatic neural stimulation modulation based on activity and circadian rhythm According to an embodiment of a method for providing neural stimulation, activity is sensed, and neural stimulation is automatically controlled based on the sensed activity. An embodiment determines periods of rest and periods of exercise using the sensed activity, ... | 08/24/2010 |
| 7769452 | Method and apparatus for detecting arrhythmias in a medical device A method of detecting a cardiac event in a medical device that includes sensing cardiac signals from a plurality of electrodes forming a first sensing vector and a second sensing vector, determining whether the first sensing vector and the second sensing vector is c... | 08/03/2010 |
| 7765003 | Synchronization control system A method of controlling the operation of a pulsatile heart assist device (14) in a patient (10). The method consisting of utilising sounds produced by the heart (12) to control the operation of the heart assist device (14). ... | 07/27/2010 |
| 7761158 | Detection of heart failure decompensation based on cumulative changes in sensor signals Systems, devices and methods provide for evaluation of heart failure symptoms. Sensor data associated with one or more symptoms of heart failure are acquired and trended. Statistical features, such as slope, are extracted from the data trend in a moving window and a... | 07/20/2010 |
| 7725186 | Complimentary activity sensor network for disease monitoring and therapy modulation in an implantable device Energy efficient methods and systems for using multi-dimensional activity sensors with implantable cardiac devices are provided. In certain embodiments the output of a passive activity sensor (used for rate responsive pacing) is used to trigger temporary use of a re... | 05/25/2010 |
| 7711423 | Algorithm for the automatic determination of optimal pacing intervals Impedance, e.g. sub-threshold impedance, is measured across the heart at selected cardiac cycle times as a measure of chamber expansion or contraction. One embodiment measures impedance over a long AV interval to obtain the minimum impedance, indicative of maximum v... | 05/04/2010 |
| 7706880 | System and method for systolic interval analysis A system and method provide for systolic interval analysis. In an example, an implantable device measures a cardiac impedance signal. A transformation of the cardiac impedance interval is generated. The device also measures a heart sound signal. A time interval betw... | 04/27/2010 |
| 7689283 | Diastolic mechanical algorithm for optimization of AV timing using a plurality of sensors Systems and methods are provided for adjusting atrioventricular timing of a cardiac resynchronization therapy device, based upon multi-modal sensory data. In one particular embodiment, one or more acoustic signals are processed and categorized into certain cardiac-r... | 03/30/2010 |
| 7676266 | Monitoring ventricular synchrony An exemplary method includes providing a maximum right ventricular systolic pressure value and corresponding time during a cardiac cycle, providing a left ventricular displacement value for the corresponding time, determining a product of the maximum right ventricul... | 03/09/2010 |
| 7676265 | Implantable cardiac stimulation device and method providing dynamic sensing configurations for bichamber stimulation and tachyarrhythmia detection An implantable cardiac stimulation device provides bichamber pacing and dynamic bichamber and single chamber sensing. The device includes a sensing circuit that senses activity of a heart, a lead system coupled to a plurality of chambers of the heart, and a cardiac ... | 03/09/2010 |
| 7653437 | Method and apparatus for determining optimal pacing therapy timing intervals A method for determining an optimal pacing timing control parameter setting is provided for use in an implantable medical device programmed to deliver a pacing pulse in response to the timing control parameter. The method includes storing a user-selected optimizatio... | 01/26/2010 |
| 7643879 | Integrated cardiac rhythm management system with heart valve Systems and methods using a heart valve and an implantable medical device, such as for event detection and optimization of cardiac output. The cardiac management system includes a heart valve, having a physiological sensor. The physiological sensor is adapted to mea... | 01/05/2010 |
| 7596412 | Opto-electrical coherence detection of hemodynamically compromising arrhythmia System and methods for assessing sensed signals for determining a reliability measure of their accuracy with respect to a patient's true physiological status. As one example, the signals can include multiple, independently obtained signals, such as an electro-chemic... | 09/29/2009 |
| 7570998 | Acoustic communication transducer in implantable medical device header An implantable medical device is adapted for implantation into body tissue. The implantable medical device comprises a housing and a header coupled to the housing. A cavity is located in the header. An ultrasonic transducer adapted to transmit acoustic waves at a co... | 08/04/2009 |
| 7548785 | Collecting and analyzing sensed information as a trend of heart failure progression or regression An exemplary method includes selecting a cross-correlation frequency having an associated cross-correlation period, detecting and binning a heart rate in a heart rate bin, detecting and binning an activity state in an activity state bin, repeating the detecting and ... | 06/16/2009 |
| 7526338 | Implantable cardiac device for monitoring diastolic heart failure and method of operation and use thereof An implantable cardiac device is used to measure one or more parameters relating to cardiac activity of a patient's heart, from which diastolic heart failure (“DHF”) may be monitored and/or detected. These parameters are used to calculate ventricular isovolumetr... | 04/28/2009 |
| 7430448 | Implantable cardiac device providing intrinsic conduction search with premature atrial contraction protection and method The extended AV interval of an auto intrinsic conduction search of an implantable cardiac stimulation device has premature atrial contraction protection. A timer times a base AV interval and the extended AV interval. If the heart is paced with the extended AV interv... | 09/30/2008 |
| 7404799 | System and method for detection of respiration patterns via integration of intracardiac electrogram signals Techniques are provided for tracking patient respiration based upon intracardiac electrogram signals or other electrical cardiac signals. Briefly, respiration patterns are detected by integrating cardiac electrical signals corresponding to individual paced cardiac c... | 07/29/2008 |
| 7392084 | Demand-based cardiac function therapy A method and device for delivering cardiac function therapy on a demand basis. An implantable device for delivering cardiac function therapy is programmed to suspend such therapy at periodic intervals or upon command from an external programmer. Measurements related... | 06/24/2008 |
| 7389142 | Heart monitoring device, system and method In an implantable heart-monitoring device and system, and a heart-monitoring method, a control circuit is connected to one or more sensors, a first of which is positionable in the coronary sinus region of a heart and senses at least one blood constituent, and at lea... | 06/17/2008 |
| 7389143 | 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... | 06/17/2008 |
| 7366569 | Non-invasive method and apparatus for cardiac pacemaker pacing parameter optimization and monitoring of cardiac dysfunction A plethysmogram signal is sensed from a patient and provided to a programmer device for monitoring the condition of the patient and for optimizing pacing parameters of a cardiac device implanted in the patient. The programmer device analyzes the plethysmogram signal... | 04/29/2008 |
| 7361146 | 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 in... | 04/22/2008 |
| 7346394 | Cardiac stimulation at high ventricular wall stress areas An apparatus and method for reversing ventricular remodeling with electro-stimulatory therapy. A ventricle is paced by delivering one or more stimulatory pulses in a manner such that a stressed region of the myocardium is pre-excited relative to other regions in ord... | 03/18/2008 |
| 7340302 | Treating sleep apnea in patients using phrenic nerve stimulation An exemplary implantable cardiac device is programmed to administer pacing therapy that treats both congestive heart failure (CHF) and sleep apnea. To treat CHF, the exemplary device delivers pacing pulses of a first voltage level via a lead in the left-sided veins ... | 03/04/2008 |
| 7336997 | Heart treatment equipment and heart treatment method Heart treatment equipment and a heart treatment method directed to prevention of a fatal arrhythmia by detecting a physical exercise or a mental stress by using a sensor and thereafter controlling the vagus nerve stimulation, wherein sensor means for detecting vario... | 02/26/2008 |
| 7333854 | Orthostatic cardiac output response pacer for heart failure patients and diabetic patients An exemplary method includes detecting a change in position, measuring cardiac output after the detecting a change in position and, based at least in part on the measuring cardiac output, deciding whether to increase a cardiac pacing rate. An exemplary method may re... | 02/19/2008 |
