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6298267 |
Method and apparatus for treatment of cardiac electromechanical dissociation
An apparatus and method for treating post-defibrillation electromechanical dissociation ("EMD") or pulseless electrical activity ("PEA"). A first embodiment comprises an implantable defibrillator...
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6266552 |
Method and arrangement for locating a measurement and/or treatment catheter in a vessel or organ of a patient
In a method for locating a measurement and/or treatment catheter in a vessel or organ of a patient relative a fixed catheter, also positioned within the patient in the vicinity of the measurement...
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6226550 |
Implantable defibrillator apparatus
An implantable defibrillator apparatus having a plurality of defibrillation electrodes which can be applied to the heart muscle in order to apply electric defibrillation shocks thereto, and...
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6185456 |
Defibrillator disarm circuit utilizing thermal feedback
A discharge resistor is thermally monitored under computer supervisory control. Current flow through the resistor is duty-cycle controlled to prevent thermal damage.
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6090056 |
Resuscitation and alert system
A resuscitation device for automatic compression of victim's chest using a compression belt which exerts force evenly over the entire thoracic cavity. The belt is constricted and relaxed through a...
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6027473 |
Handle for steerable DMR catheter
A steerable direct myocardial revascularization catheter comprises a catheter body, a tip section and a control handle. The catheter body has an outer wall, proximal and distal ends and at least...
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6009349 |
System and method for deriving hemodynamic signals from a cardiac wall motion sensor
A processing system and method are provided for deriving an improved hemodynamic indicator from cardiac wall acceleration signals. The cardiac wall acceleration signals are provided by a cardiac...
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5957861 |
Impedance monitor for discerning edema through evaluation of respiratory rate
An impedance monitor for discerning edema through evaluation of respiratory rate. Preferred embodiment includes edema monitor and trigger to initiate diagnostic reporting or corrective action when...
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5954752 |
Cardioversion energy reduction system
In an implantable pacemaker.backslash.cardioverter.backslash.defibrillator, a system for correlating the delivery of an atrial cardioversion therapy to an optimum blood pressure to effect delivery...
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5944742 |
AAMI specification optimized truncated exponential waveform
A method of generating and applying a defibrillation shock of the present invention includes first applying a defibrillation shock pulse to a patient with an initial predetermined amount of energy...
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5904707 |
Environment-response method for maintaining an external medical device
A method of indicating operational status of an electronic device, the device providing an indication of device operational status as a result of a self-test, the method including the following...
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5836976 |
Cardioversion energy reduction system
In an implantable pacemaker/cardioverter/defibrillator, a system for correlating the delivery of a cardioversion therapy to an optimum point or phase of the respiratory cycle of the patient to...
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5824014 |
Medical therapy device producing a variable therapy in response to measured sensor values corrected with temporal fluctuation values
A medical therapy device includes at least one sensor for detecting a varle that can be measured on the body of a patient. An evaluating and control device is connected to the output of the sensor....
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5824018 |
Fibrillation induction method and system for implantable devices
A method and apparatus for generating a multiphasic defibrillation/cardioversion waveform as well as a multiphasic fibrillation inducing pulse train. The multiphasic fibrillation inducing waveform...
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5817131 |
Method and apparatus for alleviating cardoversion shock pain
An implantable cardioverter for providing cardioversion electrical energy to at least one chamber of a patient's heart in need of cardioversion and applying a pain alleviating therapy at an...
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5803927 |
Electrotherapy method and apparatus for external defibrillation
An electrotherapy method and apparatus for delivering a multiphasic waveform from an energy source to a patient. The preferred embodiment of the method comprises the steps of charging the energy...
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5782879 |
Apparatus and method for discriminating flow of blood in a cardiovascular system
An implantable cardiac stimulator delivers a first electrical shock via implantable stimulating electrodes at a time when there is substantially no flow of blood. At least one of the stimulating...
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5776166 |
Method for applying a multiphasic waveform
This invention provides an external defibrillator and defibrillation method that automatically compensates for patient-to-patient impedance differences in the delivery of electrotherapeutic pulses...
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5730144 |
Method and apparatus for predicting the efficacy of cardioversion
An apparatus and method for predicting the efficacy of cardioversion as a dality for reverting a patient with atrial fibrillation to normal sinus rhythm. Blood flow through the patient's atrium is...
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5728139 |
Automatic waveform selection for defibrillation
A method and device for efficient defibrillation, to be utilized in external defibrillation machines, capable of being utilized with 2, 3, or more defibrillation electrodes. The method and device...
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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...
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5697955 |
Defibrillator electrodes and date code detector circuit
A package of defibrillator electrodes having a date indication element and a circuit for determining a date of manufacture of medical electrodes within the package is provided. Specifically, by the...
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5693075 |
Device for determining myocardial function and corresponding procedure
The device senses Natural Heart Acceleration (NHA), isolating at least one segment (t) thereof corresponding to an isovolumetric phase, such as isovolumetric contraction (P1, P2) and/or...
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5658318 |
Method and apparatus for detecting a state of imminent cardiac arrhythmia in response to a nerve signal from the autonomic nerve system to the heart, and for administrating anti-arrhythmia therapy in response thereto
A device for detecting a state of imminent cardiac arrhythmia, relative to a normal state for a heart, in response to activity in nerve signals conveying information from the autonomic nerve system...
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5630834 |
Atrial defibrillator with means for delivering therapy in response to a determination that the patient is likely asleep
An automatic atrial defibrillator which includes a mechanism for sensing the occurrence of atrial fibrillation in a patient's heart and in response thereto delivers an atrial defibrillation pulse....
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5607454 |
Electrotherapy method and apparatus
An electrotherapy method and apparatus for delivering a multiphasic waveform from an energy source to a patient. The preferred embodiment of the method comprises the steps of charging the energy...
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5601611 |
Optical blood flow measurement apparatus and method and implantable defibrillator incorporating same
A cardiac blood flow sensor includes a light source and a photodetector within a housing. The light source projects a beam through a fiber optic line having a first end optically connected to the...
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5545182 |
Cardioverter/defibrillator shock timing function
An implantable automatic cardioverter/defibrillator device for a cardiac patient is automatically responsive to sensing of electrical cardiac activity of the heart of a patient in which the device...
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5531768 |
Implantable atrial defibrillator having ischemia coordinated intervention therapy and method
An atrial defibrillator coordinates atrial cardioversion with ischemia detection. The defibrillator includes a plurality of sense amplifiers for sensing electrical activity of a heart. An ischemia...
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5522854 |
Method and apparatus for the prevention of arrhythmia by nerve stimulation
Arrhythmia is prevented by detecting a high risk of arrhythmia and then stimulating afferent nerves to prevent the arrhythmia. By monitoring the sympathetic and parasympathetic nerve activity of a...
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5507780 |
Selective default data storage for an implantable atrial defibrillator
A defibrillator, such as an atrial defibrillator, applies cardioverting electrical energy to the atria of a heart when the atria are in need of cardioversion. The atrial defibrillator includes an...
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5500004 |
Cardio myostimulation system with defibrillation
A pacemaker system for a heart having an external muscle is used to control pacing of the heart during normal or even arrhythmic modes. In these modes, the muscle is stimulated synchronously with...
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5490862 |
Atrial defibrillator having patient activated modality
An atrial defibrillator implantable beneath the skin of a patient includes an intervention sequencer for performing an intervention sequence. The intervention sequencer includes an atrial...
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5472453 |
Medical interventional device with accelerometer for providing cardiac therapeutic functions
A medical interventional device adapted to be implanted in the body of a patient provides a plurality of cardiac therapeutic functions including bradycardia pacing, rate adaptive pacing,...
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5464434 |
Medical interventional device responsive to sudden hemodynamic change
A medical interventional device is adapted to be implanted in a patient's body to provide a number of different controllable therapeutic functions including cardiac pacing, antitachycardia pacing,...
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5454838 |
Method and a device for monitoring heart function
Heart function is monitored by monitoring the momentum or velocity of the heart masses, preferably by means of a sensor implanted in the heart mass.
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5447521 |
Safety system for an implantable defibrillator
A defibrillator pulse generator for pectoral implant utilizing the metal case as an electrode and operative to supply unique patterns of monophasic, biphasic, or pairs of electrical pulses to the...
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5441525 |
Pacemaker with vasovagal syncope detection
A rate-responsive cardiac pacemaker implements a novel scheme which detects incipient vasovagal syncope (or other episodes caused by a vasodepressive or cardioinhibitory disorder) when a) the heart...
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5441521 |
Heart defibrillator
A heart defibrillator includes a defibrillation circuit for delivering defibrillation pulses. The defibrillation circuit also emits a pre-pulse before the defibrillation pulse. The pre-pulse is not...
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5431685 |
Implantable medical interventional device with criteria modification to enhance recognition of Tachycardia
A device-implemented method detects and treats abnormal (i.e., pathologic) tachycardias experienced by a patient with an implanted automatic defibrillator. The defibrillator has the capability to...
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5431686 |
Method for optimal pulse defibrillation using an implantable defibrillator
The model that is developed in the present invention is based upon the pioneering neurophysiological models of Lapicque and Weiss. The present model determines mathematically the optimum pulse...
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5413591 |
Current truncated waveform defibrillator
A system and method is provided for implantable cardioverter defibrillators to truncate peak current output during defibrillation countershock therapy to a safe level irrespective of the resistance...
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5411529 |
Waveform discriminator for cardiac stimulation devices
An apparatus for producing signals indicative of power levels of depolarizations of heart tissue, particularly adapted for use in an implantable antiarrhythmia device or an implantable pacemaker....
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5404877 |
Leadless implantable sensor assembly and a cardiac emergency warning alarm
A leadless implantable cardiac arrhythmia alarm is disclosed which continuously assesses a patient's heart function to discriminate between normal and abnormal heart functioning and, upon detecting...
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5397336 |
Defibrillator/cardioverter
In order to be able to set the distribution of current of the defibrillation current across the heart muscle, a defibrillator/cardioverter has n (n≥3) electrodes connected to a pulse generator...
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5385576 |
Method for detecting ventricular fibrillation and apparatus for detecting and treating ventricular fibrillation
In a method and apparatus for detecting ventricular fibrillation, a measured impedance signal, dependent on the blood volume in the heart, is evaluated, and ventricular fibrillation is assumed to...
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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...
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5370664 |
Pulse forming circuits
Circuits for controlling the current flow of an energy pulse as a function of the temperature of a resistive element in the circuit so that the current flow varies over time in accordance with a...
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5342404 |
Implantable medical interventional device
An implantable medical interventional device responds to detection of cardiac activity of the patient indicative of ventricular tachycardia (VT) or fibrillation (VF) by successively applying to the...
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5330505 |
System for and method of treating a malfunctioning heart
A system for treating the malfunctioning heart of a patient includes means which derive at least one electrical signal from the patient's heart and means which derive at least two physiologic...
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