Matches 51 - 96 out of 96 < 1 2
Match Document Document Title
5978706 Stacked capacitor truncated damped sinusoidal defibrillation waveform  
An apparatus for generating a waveform for use in externally defibrillating the heart of a patient includes a plurality of capacitors chargeable to respective charge potentials. A control apparatus...
5968080 Method for determining the second phase of external defibrillator devices  
A method for determining an optimal transchest external defibrillation waveform which, when applied through a plurality of electrodes positioned on a patient's torso will produce a desired response...
5954753 Implantable defibrillator with improved testing of capability to defibrillate  
A defibrillator is designed for implantation in a patient and for programming certain of its parameters after implantation, including energy content of a shock waveform and timing of delivery of...
5944746 ICD with continuous regular testing of defibrillation lead status  
An implantable cardiac stimulating device which incorporates the functionality of both a pacemaker and an implantable cardioverter-defibrillator (ICD). The implantable cardiac stimulating device is...
5919213 Defibrillation test system using actual ICD housing electrode  
An intraoperative defibrillation test system for establishing defibrillation thresholds for an implantable cardioverter defibrillator (ICD) uses the actual ICD housing electrode, rather than a test...
5836977 Defibrillator method and system for making post-discharge measurements of energy and impedance  
A defibrillator incorporates a method and device for determining the energy delivered to and electrical resistance of biological tissues. The defibrillator's method and device achieve these...
5800463 Electrotherapy circuit having controlled peak current  
An electrotherapy circuit administers to a patient a current waveform. The electrotherapy circuit includes a charge storage device, at least two discharge electrodes connected by electrical...
5800462 Electrotherapy circuit for producing therapeutic discharge waveform based on high-current sensing pulse  
An electrotherapy circuit administers to a patient a current waveform. The electrotherapy circuit includes a charge storage device, at least two discharge electrodes connected by electrical...
5755742 Cardioversion/defibrillation lead impedance measurement system  
A lead integrity measurement system for a cardiac pacemaker/cardioverter/defibrillator (PCD) of the type comprising an implantable pulse generator (IPG) and a lead system including one or more...
5755664 Wavefront direction mapping catheter system  
A wavefront direction mapping catheter system is disclosed which includes a wire catheter that, when placed on the inner surface of the heart, identifies the direction of the electric field...
5735879 Electrotherapy method for external defibrillators  
This invention provides an external defibrillator and defibrillation method that automatically compensates for patient-to-patient impedance differences in the delivery of electrotherapeutic pulses...
5716381 Electrophysiology diagnostic device including variable capacitance emulation and voltage threshold determination circuits  
An electrophysiology diagnostic device generating a high voltage (HV) pulse of a predetermined shape, which device is electrically connected to a patient's heart, i.e., a load resistance and which...
5709709 ICD with rate-responsive pacing  
An implantable cardioverter defibrillator (ICD) system features rate-responsive pacing capabilities. An electrical pulse generating device having a housing containing pulse generating circuitry is...
5709711 Implantable defibrillator with electrophysiologic testing capabilities  
A method and apparatus for performing electrophysiologic testing on a patient's heart using an implantable pulse generator system. The system includes an implantable pulse generator such as an...
5662696 One piece disposable threshold test can electrode for use with an implantable cardioverter defibrillator system  
The present invention is a one piece, disposable pulse generator emulator for emulating a subcutaneous implantable cardioverter defibrillator (ICD) having an active housing electrode. The emulator...
5645571 Automated external defibrillator with lid activated self-test system  
An automated external defibrillator which automatically performs self-tests on a daily and weekly basis. Tested functions include the presence and interconnection of defibrillator electrodes,...
5643325 Defibrillator with shock energy based on EKG transform  
A method for detecting a heart disorder comprises examination of a phase-plane plot (PPP) of a patient electrocardiogram (EKG). The PPP's degree of deterministic chaos may be measured by a...
5609618 Apparatus and method for inducing fibrillation  
A method and apparatus for inducing fibrillation in a patient's heart by delivering an alternating current stimulus to the heart from a DC-to DC converter. The hardware of a conventional...
5607455 Method and apparatus for automatic shock electrode enabling  
Methods, circuits and devices useful for maximizing the likelihood of successful defibrillation or cardioversion using an automatic implantable cardioverter/defibrillator ("AICD") system are...
5564422 Method and apparatus for improved prediction of transvenous defibrillation threshold  
A system and method for predicting the defibrillation threshold energy of a defibrillation lead arrangement by determining the upper limit of vulnerability of the heart by shocking the heart at...
5549646 Periodic electrical lead intergrity testing system and method for implantable cardiac stimulating devices  
A periodic electrical lead integrity testing system is provided which periodically tests electrical leads used with an implantable cardiac stimulating device. The system is especially advantageous...
5540724 Cardiac cardioverter/defibrillator with in vivo impedance estimation  
An implantable device, such as a defibrillator which may include cardioversion and pacemaker capabilities, which automatically measures the impedance of the heart prior to the delivery of a...
5531770 Device and method for determining defibrillation thresholds  
A method for rapidly and accurately determining defibrillation thresholds. The method comprises the steps of delivering an initial shock series to a patient, the shock series comprising at least...
5431687 Impedance timed defibrillation system  
An implantable cardiac defibrillator system, comprising: a) a charge storage element, b) a switching element connected to the charge storage element, c) a processor capable of detecting a...
5395373 Atrial defibrillator and method for setting energy threshold values  
An implantable atrial defibrillator cardioverts the atria of a patient's heart and determines the quantity of cardioverting electrical energy required for cardioverting the atria of the patient....
5384544 Method and apparatus for calibrating the energy output of a defibrillator  
A defibfillator has a self healing storage capacitor connected in parallel with a safety resistor, and a microcontroller. Upon receipt of a calibration request, the microcontroller charges the...
5372606 Method and apparatus for generating adaptive n-phasic defibrillation waveforms  
A method and apparatus for delivering an adaptive n-phasic waveform to the heart in either a fixed-tilt delivery mode or a fixed-duration delivery mode. A first phase of a first polarity is...
5350405 Method and apparatus for capacitor tolerance compensation in a cardiac stimulating device  
A method and apparatus for determining the actual capacitance of a capacitor in a cardiac stimulating device in order to determine the potential necessary to store a desired amount of energy on the...
5350403 Apparatus for charging living tissue with electrical pulses  
An apparatus for charging living tissue with electrical pulses has a charging capacitor that, for discharging, is connected via a controllable switch to electrodes in the region of the tissue. In...
5344430 Method and apparatus for termination of ventricular tachycardia and ventricular fibrillation  
An implantable defibrillator provided with a plurality of defibrillation electrodes, which may be reconfigured to define a plurality of defibrillation pathways. The device is capable of measuring...
5215081 Method and device for measuring subthreshold defibrillation electrode resistance and providing a constant energy shock delivery  
A method and apparatus for measuring subthreshold defibrillation electrode resistance are disclosed. A known subthreshold current pulse is sourced across the electrodes, the resulting voltage is...
5201865 Medical lead impedance measurement system  
A method and apparatus for measuring lead impedance during preselected test mode operation of an implantable body tissue stimulator. The analysis circuitry is periodically triggered into operation,...
5115807 Programmable defibrillator with pulse energy and resistance displays and methods of operating the same  
The subject apparatus integrates a two-channel defibrillator with a programmable stimulator to provide a means for assessing lethal ventricular tachyarrhythmias and determining defibrillation...
5111813 Defibrillation employing an impedance-corrected delivered energy  
Impedance-normalized delivered energy is used as a control parameter in a defibrillation methodolgy and can be selected to yield the highest probability of successful defibrillation while...
5097830 Defibrillator with reliability verification  
A defibrillator is described with dual processors for verifying the performance of the defibrillator and halting the application of a defibrillation pulse to a patient if a failure of system...
5088489 Current-based defibrillating method  
An apparatus and method for the treatment of ventricular fibrillation, ventricular tachycardia, or supraventricular tachycardia. The method being to prospectively ascertain a patient's...
5014697 Programmable defibrillator  
The subject invention integrates a two-channel defibrillator with a programmable stimulator to provide a means for assessing lethal ventricular tachyarrhythmias and determining defibrillation...
4840177 Current-based defibrillator  
A method and apparatus is disclosed for providing to the body of a patient a defibrillation pulse having a magnitude calculated to induce in that particular patient a desired defibrillation...
4785812 Protection system for preventing defibrillation with incorrect or improperly connected electrodes  
A protection circuit for a defibrillator that prevents a defibrillator pulse from being generated if the impedance between the defibrillator's electrode leads is not characteristic of the impedance...
4574810 Automatic threshold defibrillator  
A defibrillator which will automatically ascertain the transthoracic resistance of the patient and then automatically apply a defibrillation shock according to the transthoracic resistance and an...
4536844 Method and apparatus for simulating aural response information  
Speech and like signals are analyzed based on a model of the function of the human hearing system. The model of the inner ear is expressed as signal processing operations which map acoustic signals...
4372324 Analog peak voltage detector in a defibrillator  
A circuit for detecting and holding the peak voltage of an analog signal is provided. A constant current source controlled by a digital voltage comparator charges a capacitor. The capacitor is...
4328808 Defibrillator with means for determining patient impedance and delivered energy  
A defibrillator apparatus applies defibrillation a shock pulse to a patient at a selected energy level. The peak current magnitude of the pulse is sensed and processed to produce an indication of...
3815611 MUSCLE STIMULATION AND/OR CONTRACTION DETECTION DEVICE  
The apparatus detects contraction of muscles of living animals, the contraction causing an elastomer body whose impedance changes when flexed, positioned adjacent muscle to flex when the...
3782389 COMPUTER CONTROLLED DEFIBRILLATOR  
A computer controlled defibrillator comprising a set of electrodes which are engageable with a patient and which are connected to a source of electrical energy by a circuit means. The circuit means...
3747605 DEFIBILLATOR AND METHOD AND APPARATUS FOR CALIBRATING, TESTING, MONITORING AND/OR CONTROLLING A DEFIBRILLATOR OR THE LIKE  
An electronic energy analyzer circuit is connected to a defibrillator calibrating, testing, monitoring and controlling the energy output of the defibrillator used for treating certain cardiac...
Matches 51 - 96 out of 96 < 1 2