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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 5052407 | Cardiac defibrillation/cardioversion spiral patch electrode An implantable cardiac defibrillation/cardioversion electrode. The electrode is elongated and comprises a distal active region and a proximal lead region. Conductive discharge and insulative materials occupy distinct surfaces along the length of the activ... | 10/01/1991 |
| 4928688 | 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 t... | 05/29/1990 |
| 4819643 | Method and apparatus for cardioverter/pacer featuring a blanked pacing channel and a rate detect channel with AGC The implantable cardioverter/pacer includes a pacer channel and a rate detect channel both receiving a cardiac signal representative of the ECG of patient. The pacing channel issues a pacing signal when the amplitude of the cardiac signal fails to exceed ... | 04/11/1989 |
| 4817608 | Cardioverting transvenous catheter/patch electrode system and method for its use Disclosed are an electrode configuration and a method for its use with an automatic implantable cardioverter/defibrillator. The electrode configuration includes a catheter electrode intravenously positioned within the heart of a patient wherein one electr... | 04/04/1989 |
| 4796620 | System for sensing abnormal heart activity by means of heart rate acceleration and deceleration detection A heart rate acceleration/deceleration detecting system particularly for use with an automatic defibrillator/cardioverter. The detection system detects a series of heart beats and determines, for a group of beats, such as on a beat-by-beat basis, whether ... | 01/10/1989 |
| 4726024 | Fail safe architecture for a computer system The fail safe architecture for a computer system includes a read only memory (ROM) self-check module, a random access memory (RAM) self-check module and operation code instructions (op code) self-check module which are actuated periodically by a non-maska... | 02/16/1988 |
| 4705043 | Electrophysiology study system using implantable cardioverter/pacer An electrophysiology (EP) study system using an implantable cardioverter/pace. The system includes an implantable unit having a conventional programmable pace capable of operation in at least the VVT mode. The implantable unit transmits ECG data, in real ... | 11/10/1987 |
| 4667328 | Clocking circuit with back-up clock source A clocking system for providing periodic clocking or timing signals for use in an electronic circuit. The system includes a primary clock source, such as a crystal oscillator, that provides periodic clocking or timing signals at a predetermined frequency,... | 05/19/1987 |
| 4662377 | Cardioverting method and apparatus utilizing catheter and patch electrodes A novel electrode apparatus and method for use with an automatic implantable cardioverter/defibrillator. The electrode apparatus includes a catheter electrode intravenously positioned within the heart of a patient wherein one electrode, defined by the cat... | 05/05/1987 |
| 4614192 | Implantable cardiac defibrillator employing bipolar sensing and telemetry means An implantable cardioversion system employing a bipolar electrode for R-wave sensing, the system utilizing heart rate averaging and probability density function techniques in determining whether or not the heart of a patient is to be automatically cardiov... | 09/30/1986 |
| 4603705 | Intravascular multiple electrode unitary catheter A multiple electrode unitary intravascular cardiac catheter comprising a distal electrode for sensing and pacing, an intermediate electrode for sensing, pacing and cardioverting, and a proximal electrode for sensing and cardioverting. The catheter may als... | 08/05/1986 |
| 4592367 | Apparatus and method for digital rate averaging A digital circuit requiring minimum power for accurately and reliably measuring the average pulse rate of a periodic signal. The circuit includes a plurality of flip-flop stages adapted to be configured by control gates either as a binary counter or a shi... | 06/03/1986 |
| 4572191 | Command atrial cardioverter An externally controlled implantable electronic device for delivering a cardioverting pulse of energy to an ailing heart. A defibrillator produces a first signal when its storage device is fully charged and ready to be discharged, and a second signal when... | 02/25/1986 |
| 4567883 | Data compression of ECG data using delta modulation A data recording arrangement for recording ECG data within the body of a patient, for transmitting the ECG data to a point external to the body of a patient, and for recovering the transmitted ECG data is disclosed. The recording arrangement employs delta... | 02/04/1986 |
| 4559946 | Method and apparatus for correcting abnormal cardiac activity by low energy shocks The present invention relates to a method and apparatus for delivering two or more individual low-level pulses to correct certain cardiac arrhythmias such as high-rate ventricular tachycardia and ventricular fibrillation; at least the latter shocks are de... | 12/24/1985 |
| 4488555 | Battery condition warning system for medical implant A battery condition warning system for use in a battery powered medical implant device which generates an audible alarm to warn the patient of an impending battery failure. The warning system monitors the voltage potential of the battery during operation ... | 12/18/1984 |
| 4440172 | Apparatus for combining pacing and cardioverting functions in a single implanted device The invention relates to an apparatus for combining pacing and cardioverting functions in a single implanted device, circuitry being provided not only to interface the defibrillator to the ECG amplifier and other elements of the device, but also to provid... | 04/03/1984 |
| 4407288 | Implantable heart stimulator and stimulation method An implantable heart stimulator and related method calls for the determination of a given heart condition from among a plurality of conditions, the selection of at least one mode of operation for treating the determined condition, and the execution of the... | 10/04/1983 |
| 4393877 | Heart rate detector A heart rate detector apparatus, particularly for use in an implantable defibrillator, is disclosed. The heart rate detector apparatus includes two distinct detector circuits each responsive to ECG waveforms of different characteristics. One of the detect... | 07/19/1983 |
| 4323075 | Battery failure compensation for a power supply used in an implantable defibrillator A fully implantable power supply for use with or in a fully implantable defibrillator, which has a fibrillation detector in circuit with the power supply and a power inverter switchably in circuit with the power supply. The power supply comprises an energ... | 04/06/1982 |
| 4316472 | Cardioverting device with stored energy selecting means and discharge initiating means, and related method An externally controlled implantable electronic device for delivering a cardioverting pulse of energy to the atrium of an ailing heart. In one embodiment, the device is particularly suited for use when the patient visits the office of his physician, and c... | 02/23/1982 |
| 4314095 | Device and method for making electrical contact A specialized clip and method for electrically and mechanically joining a highly-flexible electrical conductor and a fine metallic mesh or screen for use in medical electrodes. The clip is in the form of an inverted U and has a portion of the wire mesh fo... | 02/02/1982 |
| 4303075 | Method and apparatus for maximizing stroke volume through atrioventricular pacing using implanted cardioverter/pacer A method and apparatus for maximizing stroke volume through atrioventricular pacing using an implanted cardioverter/pacer accomplishes AV pacing with an AV delay tailored to the particular patient, thereby maximizing accuracy and efficiency. The invention... | 12/01/1981 |
| 4300567 | Method and apparatus for effecting automatic ventricular defibrillation and/or demand cardioversion through the means of an implanted automatic defibrillator A method and apparatus for effecting automatic ventricular defibrillation and/or demand cardioversion comprises an implanted automatic defibrillator having a normal (ventricular defibrillation) mode of operation and a cardioverting (demand cardioversion) ... | 11/17/1981 |
| 4291707 | Implantable cardiac defibrillating electrode Disclosed is an implantable cardiac electrode for use in defibrillation. The electrode has a metallic mesh electrode surface surrounded by an insulating material which is formed so as to increase the metallic surface area while providing a substantially u... | 09/29/1981 |
| 4270549 | Method for implanting cardiac electrodes A method for implanting an electrode adjacent the heart of a patient without requiring major surgery. A skin incision is made in the anterior thoracic region and/or in the abdominal wall, and by means of a specialized implantation tool tunnels are created... | 06/02/1981 |
| 4254775 | Implantable defibrillator and package therefor A fully implantable defibrillator in which the components of the defibrillator are housed within an implantable casing. Defined within the implantable casing are two chambers. Each of the chambers is hermetically sealed from the other and from the exterio... | 03/10/1981 |
| 4223678 | Arrhythmia recorder for use with an implantable defibrillator A device for recording and subsequently reproducing information, such as desired portions of an ECG signal produced by a heart prior to and during the occurrence of a disturbance in cardiac electrical activity. Two basic embodiments of the inventive recor... | 09/23/1980 |
| 4210149 | Implantable cardioverter with patient communication Disclosed in an implantable cardioverter having the capability of communicating with its wearer. In one specific embodiment, the cardioverter is an automatic, fully implantable ventricular defibrillator including an electrical stimulator to deliver a mild... | 07/01/1980 |
| 4202340 | Method and apparatus for monitoring heart activity, detecting abnormalities, and cardioverting a malfunctioning heart Disclosed is a method and an apparatus for monitoring heart activity, for indicating or detecting abnormalities in such activity, and for taking corrective measures to return an arrhythmic heart to normal sinus rhythm. In one embodiment, monitoring and de... | 05/13/1980 |
| 4184493 | Circuit for monitoring a heart and for effecting cardioversion of a needy heart Disclosed are two embodiments of a circuit for analyzing the ECG signals of a heart and for delivering a cardioverting pulse of energy to the heart if the heart is in an arrhythmic state in need of cardioversion. In the first embodiment, the ECG is filter... | 01/22/1980 |
| 4164946 | Fault detection circuit for permanently implanted cardioverter Disclosed is a permanently implantable cardioverter, or defibrillator including built-in interrogation and testing circuitry. Implanted fault detection circuits react to malfunctions in the implanted fibrillation detection circuitry, and ensure that inapp... | 08/21/1979 |
| 4161952 | Wound wire catheter cardioverting electrode Disclosed is an implantable catheter-type cardioverting electrode whose conductive discharge surface is comprised of coils of wound spring wire. An electrically conductive lead extends through the wound wire section of the electrode and has its distal end... | 07/24/1979 |
| 3952750 | Command atrial cardioverting device An externally controlled implantable electronic device for delivering a cardioverting pulse of energy to the atrium of an ailing heart. In one embodiment, the device is particularly suited for use when the patient visits the office of his physician, and c... | 04/27/1976 |
| 3942536 | Cardioverting device having single intravascular catheter electrode system and method for its use Apparatus and method for either manually or automatically initiating the cardioversion of a malfunctioning heart. The apparatus includes a single intravascular catheter electrode system which allows for a much more compact cardioverting system capable of ... | 03/09/1976 |
