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"The abolishment of pain in surgery is a chimera. It is absurd to go on seeking it...knife and pain are two words in surgery that must forever be associated in the consciousness of the patient."
Dr. Alfred Velpeau, French surgeon ; 1839
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| Number | Title | Issue Date |
| 5662697 | Transvenous internal cardiac defibrillation apparatus having lead and electrode providing even distribution of electrical charge A lead for use with an implanted pulse generator which may be a pacemaker or defibrillator or combination thereof. The lead can deliver an electrical charge to cardiovert or defibrillate the ventricles of the heart via a large surface area defibrillation ... | 09/02/1997 |
| 5628777 | Implantable leads incorporating cardiac wall acceleration sensors and method of fabrication Implantable leads incorporating accelerometer-based cardiac wall motion sensors, and a method of fabricating such leads, are provided. The cardiac wall motion sensors transduce accelerations of cardiac tissue to provide electrical signals indicative of ca... | 05/13/1997 |
| 5606320 | Method and apparatus for micropower analog-to-digital conversion in an implantable medical device A micropower analog-to-digital converter (ADC) for use in an implantable medical device is disclosed. The ADC achieves a high conversion speed at micropower levels through a number of timing and circuit improvements over the conventional implementation of... | 02/25/1997 |
| 5601609 | Implantable cardiac stimulating device and method for administering synchronized cardioversion shock therapy to provide preemptive depolarization An implantable cardioversion shock therapy system is provided which delays delivery of a cardioversion shock until late in the cardiac cycle to optimize the chance for the vast majority of ventricular myocardial tissue to be non-refractory. The system in ... | 02/11/1997 |
| 5573550 | Implantable stimulation device having a low noise, low power, precision amplifier for amplifying cardiac signals An implantable stimulation device has a sensing amplifier circuit for amplifying low amplitude cardiac signals, while maintaining low power, to produce an output signal having a low noise level. The sense amplifier circuit includes a two-stage amplifier, ... | 11/12/1996 |
| 5573003 | Low-power delta modulator for intracardial signal monitoring in a cardiac device A low-power delta modulator analog-to-digital converter is provided that is suitable for use in a cardiac stimulating device for monitoring intracardial signals. The delta modulator consumes less power than previously available delta modulators because po... | 11/12/1996 |
| 5560369 | Cardiac arrhythmia detection system for an implantable stimulation device and method A cardiac event and arrhythmia detection system and method detects arrhythmic cardiac activity or other information from an electrogram signal of a heart. The system senses the electrogram signal through an electrogram lead, preliminarily processes the si... | 10/01/1996 |
| 5557210 | Universal cable connector for temporarily connecting implantable stimulation leads and implantable stimulation devices with a non-implantable system analyzer A universal cable connector includes a plurality of different sized connectors adapted to mate with the proximal connectors of different sized implantable stimulation leads. The cable connector attaches to a system analyzer and enables the system analyzer... | 09/17/1996 |
| 5554174 | System and method for automatically adjusting cardioverter and defibrillator shock energy as a function of time-to-therapy An implantable cardiac device for providing cardioversion and defibrillation therapies is provided, which forecasts time-to-therapy based on battery voltage degradation and provides an enhanced energy shock in the event a predetermined threshold time is r... | 09/10/1996 |
| 5549652 | Cardiac wall motion-based automatic capture verification system and method An improved implantable cardiac stimulating device that performs cardiac wall motion-based automatic capture verification system is provided. Pacing pulses of varying energy content are administered to a patient's heart, and the response of the patient's ... | 08/27/1996 |
| 5549650 | System and method for providing hemodynamically optimal pacing therapy A system and method for a pacemaker are provided, for using cardiac wall motion sensor signals to provide hemodynamically optimal pacing therapy to patient at rest, and for providing rate-responsive pacing therapy. The cardiac wall motion sensor signals a... | 08/27/1996 |
| 5549649 | Programmable pacemaker including an atrial rate filter for deriving a filtered atrial rate used for switching pacing modes An implantable dual-chamber pacemaker programmed to operate primarily in an atrial tracking mode is provided, where the pacemaker includes an atrial rate smoothing filter for producing a filtered atrial rate from an intrinsic atrial rate, and where the pa... | 08/27/1996 |
| 5540725 | Upper rate response for implantable pacemaker based on atrial lock interval pacing Atrial lock interval pacing increases stroke volume and optimizes cardiac output by providing a modified P-wave tracking mode that tracks P-waves up to a maximum instantaneous tracking rate only for short periods of time, to provide a maximum instantaneou... | 07/30/1996 |
| 5514172 | Multi-conductor lead including a connector with an interlocking insulator A multi-conductor lead having a lead body including at least two conductors and at least one electrode at a distal end for delivering an electrical stimulus, the multi-conductor lead also including a connector assembly at a proximal end, the connector ass... | 05/07/1996 |
| 5514162 | System and method for automatically determining the slope of a transfer function for a rate-responsive cardiac pacemaker A rate-responsive pacemaker measures a patient's level of activity and stores the results in an activity level histogram. The patient's average level of activity is maintained as a running average. Based on a prescribed base pacing rate, a prescribed maxi... | 05/07/1996 |
| 5513644 | Cardiac arrhythmia detection system for an implantable stimulation device A cardiac event and arrhythmia detection system and method detects arrhythmic cardiac activity or other information from an electrogram signal of a heart. The system senses the electrogram signal through an electrogram lead, preliminarily processes the si... | 05/07/1996 |
| 5507786 | System and method for measuring and storing parametric data pertaining to operating characteristics of an implantable medical device A system and method for measuring and storing parametric data pertaining to the operating characteristics of an implantable medical device are provided. The parametric data may include the impedance of a lead that is attached to a patient's heart, and the... | 04/16/1996 |
| 5496361 | System and method for detecting cardiac arrhythmias using a cardiac wall acceleration sensor signal Implantable leads incorporating accelerometer-based cardiac wall motion sensors, and a method of fabricating such leads, are provided. The cardiac wall motion sensors transduce accelerations of cardiac tissue to provide electrical signals indicative of ca... | 03/05/1996 |
| 5496352 | Activity sensors for implantable medical devices An implantable medical device including a piezoelectric accelerometer activity sensor. The activity sensor includes a thin film piezoelectric cell within a frame structure. A mass imposes a load based upon acceleration to apply lateral or transverse force... | 03/05/1996 |
| 5493100 | Thermistor flow sensor and related method A fluid flow rate measuring apparatus having a thermistor exposed to a flow of fluid and a driver circuit operable in an initial constant-voltage mode, in which it applies a substantially constant voltage across the thermistor, and a subsequent constant-c... | 02/20/1996 |
| 5490323 | Method for making a body implantable sensor The present invention includes a body implantable lead having a multipolar proximal connector, at least a first conductor coupled to at least one stimulating electrode, a sensor for sensing at least one physiologic parameter of the body, and a second and ... | 02/13/1996 |
| 5476487 | Autothreshold assessment in an implantable pacemaker Capture is assessed in an implantable pacemaker by issuing a pair of stimulation pulses, separated by about 60-100 milliseconds. The second pulse of the stimulation pair is set to an energy level that assures capture, and remains at that level. The first ... | 12/19/1995 |
| 5476485 | Automatic implantable pulse generator The present invention is directed toward a pulse generator for detecting that a pulse generator and an implantable lead are properly implanted so that a plurality of automatic features can be automatically turned ON. The automatic features include: automa... | 12/19/1995 |
| 5476483 | System and method for modulating the base rate during sleep for a rate-responsive cardiac pacemaker A system and method are provided for modulating the base rate of a transfer function for a rate-responsive cardiac pacemaker. Activity sensor measurements are used to derive activity variance measurements, which in turn are used to modulate the base pacin... | 12/19/1995 |
| 5472454 | Leakage current blocking circuit A defibrillator circuit that uses one or more self-switching switches to prevent the flow of leakage current through a patient's heart is provided. When the voltage across a self-switching switch is below a predetermined threshold the self-switching switc... | 12/05/1995 |
| 5466246 | Telemetry receiver for implantable device, incorporating digital signal processing An improved programmer apparatus for receiving digital data telemetered from an implantable device such as a heart pacemaker with substantially reduced hardware complexity and with convenient flexibility to adapt to data received in multiple modulation fo... | 11/14/1995 |
| 5431689 | Implantable stimulation system and method for terminating cardiac arrhythmias A cardiac arrhythmia is terminated by stimulating the heart during the narrow "region of susceptibility" or termination window of the arrhythmia cycle based upon a statistically significant starting value. The present invention will store a plurality of s... | 07/11/1995 |
| 5425373 | Apparatus and method for analyzing and enhancing intercardiac signals An external diagnostic/programming device is disclosed which includes means for both displaying intracardiac electrical signals sensed and telemetered from an implantable pacemaker in real-time, and for storing the intracardiac electrical signals for subs... | 06/20/1995 |
| 5423883 | Implantable myocardial stimulation lead with sensors thereon A myocardial lead is provided with at least one sensor for sensing at least one of heart rate, physiological demand, or arrhythmia. Preferably, the sensor is a piezoelectric crystal, and is designed to flex with the beating of the human heart. Other suita... | 06/13/1995 |
| 5417718 | System for maintaining capture in an implantable pulse generator An autocapture system within an implantable pulse generator automatically maintains the energy of a stimulation pulse at a level just above that which is needed to effectuate capture. The electrical post-stimulus signal of the heart following delivery of ... | 05/23/1995 |
| 5354328 | Patch electrode for an implantable defibrillator A patch electrode including a generally oval-shaped metallic mesh affixed to a polymer insulation backing and an insulation frame, and further including a plurality of specially designed lattices which divide the metallic mesh into a plurality of windows ... | 10/11/1994 |
| 5350401 | Implantable cardioverter/defibrillator device having means for determining and treating low amplitude ventricular fibrillation and method thereof An ICD/pacemaker device provides a shocking pulse whenever it senses cardiac activity indicative ventricular fibrillation by standard means and a unique algorithm to respond to low amplitude ventricular fibrillation that would not be expected to be recogn... | 09/27/1994 |
| 5334045 | Universal cable connector for temporarily connecting implantable leads and implantable medical devices with a non-implantable system analyzer A universal cable connector includes a plurality of different sized connectors adapted to mate with the proximal connectors of different sized implantable leads. The cable connector attaches to a system analyzer and enables the system analyzer to interfac... | 08/02/1994 |
| 5318926 | Method for packaging an integrated circuit using a reconstructed plastic package A method of re-configuring any pre-fabricated plastic package (with or without a silicon chip and wires inside) so that an integrated circuit chip can be installed and interconnected for normal use. A pre-molded plastic package is abraded over (or molded ... | 06/07/1994 |
| 5282841 | Implantable stimulation device and method of making same A ribbon conductor set and related method of production and installation are provided for electrically interconnecting components in an implantable medical device, such as a heart pacemaker unit or the like. The ribbon conductor set is formed by die cutti... | 02/01/1994 |
| 5267564 | Pacemaker lead for sensing a physiologic parameter of the body The present invention includes a body implantable lead having a multi-polar proximal connector, at least a first conductor coupled to at least one stimulating electrode, a sensor for sensing at least one physiologic parameter of the body, and a second and... | 12/07/1993 |
| 5144946 | Combined pacemaker substrate and electrical interconnect and method of assembly A pacemaker having a single integrated interconnect structure is disclosed which combines the functions of a flexible interconnect cable and a protective lid for a hybrid substrate. The integrated interconnect structure is a molded three-dimensional part ... | 09/08/1992 |
| 5082453 | Multi-contact connector system for an implantable medical device A multi-contact connector system for electrically and mechanically connecting a lead for the delivery of electrical energy at a body site to an implantable source of the electrical energy includes a plug connector element carried at a proximal end of the ... | 01/21/1992 |
