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4603696 |
Lead connector
A connection system for joining a medical electrical stimulator to its electrical stimulus delivery system features a first member having a row of more than two contact surfaces each spaced apart a...
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4601291 |
Biomedical system with improved marker channel means and method
A biomedical system such as a pacemaker system having an implantable pacemaker and external apparatus, with communications capability for communicating between the implanted device and the external...
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4600010 |
Electric stimulator and test instrument therefor
Body stimulator apparatus comprises a portable housing containing a signal generator that supplies a periodically varying treatment signal of ultrasonic frequency and given voltage and current to...
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4597388 |
Apparatus for removing cataracts
A method and apparatus are provided for removing an eye lens having a cataract therein. An electric spark is discharged in a hydraulic medium to cause an electro-hydraulic shock which is focused on...
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4593695 |
Pacemaker with improved tachycardia treatment means and method
Apparatus and method for treatment of tachycardia, wherein when tachycardia is determined a portion of a patient T-wave is sensed and utilized as indicating the end of the cardiac refractory...
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4585004 |
Heart pacing and intracardiac electrogram monitoring system and associated method
A heart pacing and monitoring system includes a new lead system which, when used in conjunction with a telemetry-pacemaker system, permits the transmission of the complete intracardiac electrogram...
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4576170 |
Heart monitor and defibrillator device
A heart monitor and defibrillator device, which can be worn by high risk patients with only minimal interference with normal daily activities, in which one pocket-size unit contains a heart monitor...
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4574807 |
Method and apparatus for pacing the heart employing external and internal electrodes
When a person's heart is beating at a slow or an irregular rate, or after defibrillation, the heart should be stabilized to beat at a particular rate. This electronic pacing method and apparatus...
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4574809 |
Portable non-invasive electromagnetic therapy equipment
The invention contemplates a cast-embedable coil structure which includes a single connector fitting, designed for exposure externally of a completed cast and for removable mounting and electrical...
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4569350 |
System for detecting pacer mediated tachycardia
A system is provided for detecting pacer mediated tachycardia. Atrial electrical signals (P waves) are sensed and ventricular electrical signals (R waves) are sensed. When a P wave is sensed, after...
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4569351 |
Apparatus and method for stimulating micturition and certain muscles in paraplegic mammals
There is disclosed a new, useful and simple apparatus, and surgical method, for implantation of same, for selective control of evacuating the urinary bladder in mammals by electrical stimulation of...
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4567892 |
Implantable cardiac pacemaker
An implantable cardiac pacemaker in which the stimulation rate is determined through a suitable programmable algorithm by the patient's ventilation rate which is taken by measuring the impedance...
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4549548 |
Pacemaker system with automatic event-programmed switching between unipolar and bipolar operation
A pacemaker system incorporates an implantable pacemaker and a plurality of electrodes, electrodes preferably being on a pacing lead for a single chamber pacemaker, or a pair of such leads for a...
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4543963 |
Method and apparatus for differentiating antegrade from retrograde P-waves and for preventing pacemaker generated tachycardia
An improved dual chamber cardiac pacing apparatus detects retrograde P-waves conduction by either determining polarity of the P-wave at a location in the right atrium adjacent the A-V node; or the...
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4537201 |
Process and device for detecting the response of the heart to an electrical stimulation pulse
The present invention relates to a process and device for detecting the response of the heart to an electrical stimulation pulse, comprising: collecting, after the end of the stimulation pulse, a...
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4532934 |
Pacemaker monitoring recorder and malfunction analyzer
A system for ambulatory monitoring and subsequent analysis and evaluation of pacemaker performance includes a recorder module which detects pacemaker spikes and in response to each spike generates...
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4527567 |
Method and apparatus for automatically evaluating the quality of the performance of a cardiac pacing system
An extra-corporeal, self-contained, on-line, beat-to-beat pacemaker function analyzer (PFA) for automatic evaluation and indication of the quality of performance of cardiac pacing systems implanted...
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4522208 |
Method for determining parameter values of an implanted programmable pacemaker
In order to determine parameter values of an implanted programmable pacemaker, each parameter value is assigned a time ΔT which is a fraction of the pacing period T in the magnetic mode. In a pair...
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4515161 |
Dual chamber pacemaker system with V-A time measurement apparatus and method
A dual chamber pacemaker having means for operating in different pacing modes, including dual chamber modes, contains the capability of switching into a fixed rate ventricular pacing mode and of...
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4513743 |
Physiological devices such as pacemakers and method for providing histogram data
A physiological device adapted for implantation in a human patient, e.g. a cardiac pacemaker or muscle stimulator, characterized by having programmable means for generating data and assembling same...
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4505276 |
Device for detecting retrograde conduction
A pacing system analyzer is constructed to provide verification that an implantable cardiac pacer operating in a demand mode will not itself produce tachycardia in a patient because of abnormally...
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4503858 |
Device for determining the pacing modality of an artificial cardiac pacemaker
A pacing system analyzer as connected to an implantable cardiac pacer and if an atrial pacing pulse is detected only, the analyzer sends a simulated P-wave to the pacer and determines the response...
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4476869 |
Pacer analyzer
An analyzer system is provided for checking the compatibility between a cardiac pacer and the stimulation requirements of the patient within which the pacer is to be implanted. Apparatus is...
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4469104 |
Multipolar connector for pacing lead
The pacing lead assembly includes a multiconductor pacing lead including a plurality of wire conductors within a sheath of insulating material. A connector assembly surrounds the proximal end of...
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4467810 |
Multi-mode microprocessor-based programmable cardiac pacer
An instruction memory for a microprocessor based cardiac pacer is equipped with code means defining improved pacing routines for accomplishing a programmably selectable 2:1 block mode in which...
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4423732 |
Sterile connector system for packaged pacer
A sterile packaging system for an implantable cardiac pacer or tissue stimulator has a ribbon-like electrical connector strip that permits testing and use of the pacer while it remains sealed in a...
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4393874 |
Bradycardia event counting and reporting pacer
There is disclosed an event counting and reporting heart pacer which is useful for patients who suffer from bradycardia. The pacer operates in a demand mode with a 2.5-second escape interval. A...
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4387717 |
Pacer internal cardiac electrogram sensing system
A system for internally sensing the cardiac electrogram in a patient with a cardiac pacemaker is disclosed comprising an implanted electrode that, in combination with the metallic case of the...
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4374382 |
Marker channel telemetry system for a medical device
A marker channel telemetry system for use with a pacemaker or other medical device for transmitting event identifying codes to a remote receiver to indicate the occurrence of specific events such...
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4364396 |
Circuit and method for measuring PSA output and energy
Apparatus and method for accurately measuring the energy output of a pacing system analyzer or other pulse generator. Voltage measurements are made across the output capacitor before and after the...
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4332256 |
System for monitoring hermetic integrity, pacing pulse and load impedance in cardiac pacers
A complete system for telemetering and monitoring the functioning of an implanted pacemaker as well as controlling the testing of the functions from a remotely located central facility is disclosed...
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4295468 |
Cardiac pacer testing system
A hand-held, portable, battery-powered test instrument for evaluating the performance of cardiac pacer devices prior to the implantation thereof and afterwards. To test R-wave sensitivity of a...
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4256114 |
Refractory measurement circuitry
An electronic test instrument for measuring the refractory interval of a demand-type cardiac pacer pulse generator. The normal pulse-to-pulse interval of the pacer under test is measured by...
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4243045 |
Method and apparatus for the suppression of interference signals in a useful signal
In an exemplary embodiment, the interference signals can occur as a mixture consisting of narrow interference pulse peaks of high amplitude and interference hum. It is desirable that such...
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4226245 |
System for detecting heart pacemaker pulses
A system is disclosed for accurately providing a signal or signals indicative of the relatively sharp leading edge and the relatively attenuated trailing edge of a pulse and in particular of a...
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4220156 |
Low power implantable apparatus and method for receiving an AM signal
An implantable AM receiver having a variable threshold which can detect signals above a changing noise level. An AM receiver is provided which provides a modulation envelope corresponding to the...
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4190055 |
Circuit for determining the parameter control states of an implanted pacer
A circuit for indicating at a remote location the control states of a fully implantable heart pacer includes a parallel to serial converter which receives the control states from a register which...
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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...
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4164227 |
Rate failure indicator
A device for automatically indicating a rate failure condition in a pacer monitoring the intrinsic pacer rate in both demand and fixed rate modes, including a first limit circuit preset at a low...
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4156430 |
Instrumentation for pacemaker diagnostic analysis
Apparatus for diagnostic analysis of patient-installed pacemaker devices. Patient connection is made via standard ECG leads and an electrically floating front end subassembly having means providing...
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4151513 |
Apparatus for sensing and transmitting a pacemaker's stimulating pulse
Apparatus is disclosed for sensing and transmitting the stimulating pulse of an implanted pacemaker over readily available, low-bandwidth transmission media to a remote receiver capable of...
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4144892 |
Cardiac pacer and monitor system
A pacer for cardiac pacing and condition monitoring in which the electrical characteristics of the pacer are altered upon a temporary or permanent charge in monitored conditions, such as the...
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4142533 |
Monitoring system for cardiac pacers
A complete system for telemetering and monitoring the functioning of an implanted pacemaker as well as controlling the testing of the functions from a remotely located central facility is disclosed...
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4141367 |
Cardiac electrode/pacer system analyzer
An instrument for detecting and measuring various characteristics of cardiac pacers and electrodes and visually displaying such measurements selectively on a digital display includes pacer analyzer...
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4137908 |
Apparatus for observing cardiac rhythm free of interfering effects
A cardiac rhythm observation apparatus that separates and then provides for correlation of cardiographic and electrocardiographic signals has four electrodes for attachment to the chest of a...
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4117848 |
Cardiac instrumentation apparatus with pacer diagnostics
In an EKG monitor capable of monitoring the stimulation pulse of a heart pacer, the inclusion of means for determining the polarity of the pacer pulse detected in the ECG signal and then for...
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4105023 |
Pacemaker artifact suppression in coronary monitoring
In heart monitoring systems for use with patients whose hearts may be stimulated by an artificial pacer and which system includes heart rate indicating means, there is provided circuitry for...
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4102345 |
Pacer demand-rate test mode control
In an implanted heart stimulating device of the demand type, test mode circuitry is arranged to cause the temporary generation of stimulation impulses at the demand-rate in the presence of...
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4096865 |
Method and apparatus for monitoring a timed failure condition relationship in a cardiac pacer
A pacer for cardiac pacing and condition monitoring in which the electrical characteristics of the pacer are altered upon a temporary or permanent change in monitored conditions, such as the...
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4088139 |
Automatic detection and registration of failure condition in a cardiac pacer monitoring system
A pacer for cardiac pacing and condition monitoring in which the electrical characteristics of the pacer are altered upon a temporary or permanent change in monitored conditions, such as the...
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