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7616994 |
Fast post-antitachycardia pacing redetection algorithm
A method comprising detecting a ventricular tachycardia heart rhythm in a patient, providing anti-tachycardia pacing (ATP) therapy to the patient in response to the ventricular tachycardia heart...
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7613512 |
Gradually synchronized simultaneous atrial and ventricular pacing for cardiac rhythm discrimination
A cardiac medical device used for delivering anti-tachycardia pacing in both the atrial and ventricular regions in a simultaneous manner, while preventing potential of inducing atrial arrhythmia....
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7603172 |
System and method of using regression models to estimate vulnerable periods for heart stimulation parameters
Heart stimulator that provides for timing a premature stimulation pulse for anti-tachycardia pacing outside the vulnerable phase of a ventricle, to terminate stable ventricular tachycardia while...
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7596410 |
Tiered antitachycardia pacing and pre-pulsing therapy
An implantable system applies tiered antitachycardia pacing (ATP) that may be combined with pre-pulsing therapy in order to reduce pain. In one implementation, an exemplary system applies a...
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7593766 |
Detector for atrial flutter and atrial fibrillation
A detector for atrial fibrillation and/or atrial flutter comprises an atrial input for receiving an atrial signal representing an intraatrial electrogram or a time course of an intraatrial...
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7590448 |
Method and apparatus for prevention of atrial tachyarrhythmias
A multi-site atrial pacemaker capable of delivering pacing pulses to one location synchronized to sensed or paced atrial depolarizations on another location and a method of its use. A defined...
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7587240 |
Atrial capture verification
Methods and systems for classifying cardiac responses to pacing stimulation and/or preventing retrograde cardiac conduction are described. Following delivery of a pacing pulse to an atrium of the...
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7583996 |
Atrial overdrive pacing in non-atrial tracking mode while maintaining AV synchrony
Heart stimulator that stimulates at least a heart's right atrium and ventricle in an atrium asynchronous stimulation mode with an overdrive stimulation rate. Interposes one resynchronization cycle...
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7583995 |
Temporary disablement feature for implantable device with anti-tachyarrhythmia functions
An implantable cardiac rhythm management device for delivering anti-tachyarrhythmia therapy is provided with a temporary disablement feature so that the delivery of anti-tachyarrhythmia therapy may...
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7580741 |
Method and device for determination of arrhythmia rate zone thresholds using a probability function
A probability function for heart rate is determined using collected and measured heart rate values. One or more heart rate probability values are selected. Thresholds for arrhythmia rate zones are...
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7580740 |
Atrial tachyarrhythmia detection using selected atrial intervals
Methods and systems are directed to detecting atrial tachyarrhythmia. A plurality of A-A intervals is detected. The detected A-A intervals are selected and used to detect atrial tachyarrhythmia....
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7570997 |
Subcutaneous cardiac rhythm management with asystole prevention therapy
Systems and methods provide for sensing of cardiac activity from a subcutaneous, non-intrathoracic location, and detecting a cardiac condition necessitating treatment in response to the sensed...
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7570990 |
Detector for atrial fibrillation and flutter
Atrial fibrillation or flutter detector having impedance unit, with measurement input, connected to atrial electrode line having electrode for unipolar measurement of atrium impedance and...
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7567838 |
Method for sensing cardiac contractile function using a lead insertable motion sensor
Systems and methods for detecting and measuring cardiac contractile function of a heart using an acceleration sensor unit inserted within the heart, such as within a vein of the cardiac wall are...
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7555341 |
System to treat AV-conducted ventricular tachyarrhythmia
Various aspects of the present subject matter provide devices and methods to treat AV-conducted ventricular tachyarrhythmia (AVCVT). According to various embodiments of the method, an AVCVT is...
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7548783 |
Implantable cardiac stimulation device having a system for providing atrial therapy based on circadian variations and method
An implantable cardiac stimulation device selects an arrhythmia therapy based upon the time of day. The device comprises an arrhythmia detector that detects an accelerated arrhythmia of a heart,...
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7546160 |
Reduction of interaction with tachyarrhythmia detection by negative offset pacing
A device and method is disclosed for improving tachyarrhythmia detection when the ventricles are resynchronized by delivering paces to both ventricles separated by a specified negative offset...
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7546159 |
Subcutaneous cardiac stimulation device, system, and method providing accelerated arrhythmia detection verification and transient rate compensation
A subcutaneous cardiac stimulation system verifies accelerated arrhythmia detection before delivering accelerated arrhythmia therapy to the heart. The stimulation system includes a verification...
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7542798 |
System and method for treating an adverse cardiac condition using combined pacing and drug delivery
A system and method of treating an adverse cardiac condition, such as cardiac arrhythmia or a non-arrhythmic event, involves producing, by use of a patient actuatable non-implanted activator, an...
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7536224 |
Method for elimination of ventricular pro-arrhythmic effect caused by atrial therapy
A system and method are provided for controlling atrial anti-tachycardia pacing (ATP) delivery based on detection of ventricular pro-arrhythmia during or immediately after atrial ATP. Ventricular...
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7532930 |
Cardiac pacemaker
Certain embodiments of the present invention disclose an electrostimulator, in particular an atrial cardiac pacemaker, comprising electrode connections which are connected to a stimulation unit for...
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7532929 |
Adaptive ventricular rate smoothing during atrial fibrillation
An implantable cardiac device is provided for adaptive ventricular rate smoothing during atrial fibrillation (AF). When AF is detected, the operation of the device is switched to non-atrial...
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7531810 |
Integrated half-beam profile measurement and polar profile for circular radiation field symmetry assessment
A method for routine monitoring and quality assurance of field asymmetry of high energy circular radiation beam producing equipment. The quality assurance process of field symmetry for devices such...
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7519421 |
Vagal nerve stimulation using vascular implanted devices for treatment of atrial fibrillation
An abnormally rapid ventricular cardiac rate that results from atrial fibrillation can be reduced by stimulating a vagal nerve of the heart. An apparatus for such stimulation includes a power...
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7515960 |
Method and apparatus to terminate ventricular tachycardia via pacing
An implantable device for terminating ventricular tachycardia is disclosed. The device includes a processor configured to determine a first antitachycardia pulse routine of N pulses. In the routine...
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7515959 |
Delivery of CRT therapy during AT/AF termination
In some embodiments, a method for operating a cardiac rhythm management device may include one or more of the following steps: (a) sensing atrial depolarizations through an implanted atrial...
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7509168 |
Cardiac stimulation device and method providing pacemaker mediated tachycardia detection during biventricular pacing stimulation
An implantable cardiac stimulation device provides biventricular pacing and pacemaker mediated tachycardia (PMT) detection. The device includes a pulse generator that provides right ventricular and...
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7496402 |
ATP pacing with entrainment monitoring
A method and system for delivering anti-tachycardia pacing (ATP) is disclosed. During delivery of an ATP burst, an implantable cardiac rhythm management device is programmed to sense evoked...
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7477942 |
ATP therapy for tachyarrhythmias in VF zone
A method and apparatus for delivering therapy to treat ventricular tachyarrhythmias is described. A ventricular tachyarrhythmia can be classified into tachycardia or fibrillation zones using a rate...
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7477935 |
Method and apparatus for beat alignment and comparison
Methods of using a template having a template data set and template parameters to provide improved alignment of captured cardiac signal data to a stored template. More particularly, in an...
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7474921 |
Adjustable overdrive pacing
An exemplary method includes providing an overdrive pacing rate and, determining an incidence limit for incidence of intrinsic atrial activity events, as well as the incidence of intrinsic atrial...
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7471982 |
Ventricular tachyarrhythmia prediction and/or prevention
Embodiments of the present invention provide apparatuses and methods to predict and/or prevent episodes of ventricular tachyarrhythmia (for example, ventricular tachycardia and/or ventricular...
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7454044 |
Volume visualization using tissue mix
A method is presented to calculate the relative contribution of different tissues, or tissue mix, to at least one data element in a medical object data set, the medical object data set containing...
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7440799 |
Therapy-selection methods for implantable heart monitors
Miniature heart-monitoring devices, such as defibrillators and cardioverters, are implanted in humans to detect and correct abnormal heart rhythms Microprocessors and stored instructions, or...
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7424323 |
Implantable cardiac stimulation device providing autocapture with PMT avoidance and method
An implantable cardiac stimulation device prevents pacemaker mediated tachycardias during autocapture. The device includes a refractory circuit that establishes a lengthened post ventricular atrial...
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7421294 |
System and method for preventing recurrence of atrial tachyarrhythmia
A system and method for providing pacing pulses after a cardioversion/defibrillation shock, where the pacing pulses have a pacing rate at an initial value. The pacing rate is decreased from the...
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7398123 |
Methods and devices for reducing the detection of inappropriate physiologic signals to reduce misdiagnosis of normal rhythms as tachyarrhythmias
Various embodiments can reduce mode switching in response to inappropriate but anticipated signals, such as far field R-waves. Additionally, various embodiments can also increase the alert period...
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7392082 |
Inter-episode implementation of closed loop ATP
Improved methods and apparatus for providing optimal anti-tachycardia pacing (ATP) regimens in response to the return cycle length (RCL) exhibited by an exploratory ATP sequence initially applied...
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7386343 |
Spectrum-driven arrhythmia treatment method
A method and apparatus for treating an arrhythmia is provided. The method includes the steps of: (a) sensing at least one electrical signal from the patient's heart; (b) calculating a frequency...
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7376461 |
Dynamic mode switch for early detection of tachyarrhythmia
An algorithm executed in an implantable cardiac rhythm management device (CRMD) automatically adjusts the time that an atrial pace (AP) and/or a ventricular pace (VP) pulse is generated by a pulse...
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7353062 |
Post-shock recovery monitoring for tachyarrhythmia discrimination
A cardiac rhythm management device is configured to discriminate between ventricular and supraventricular tachycardias (referred to as SVT/VT discrimination) by utilizing a morphology criterion in...
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7346393 |
Implantable cardiac rhythm management system having multiple therapy modalities
A cardiac rhythm management system for providing a plurality of therapy modalities. For example, the system may include a cardiac resynchronization therapy module for providing cardiac...
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7346388 |
Method and apparatus for rate accuracy enhancement in ventricular tachycardia detection
An implantable cardioverter/defibrillator (ICD) executes a rate accuracy enhancement algorithm to select measured atrial and ventricular intervals for classifying a detected tachycardia based on...
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7336997 |
Heart treatment equipment and heart treatment method
Heart treatment equipment and a heart treatment method directed to prevention of a fatal arrhythmia by detecting a physical exercise or a mental stress by using a sensor and thereafter controlling...
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7317942 |
Dynamic discrimination utilizing anti-tachy pacing therapy in an implantable medical device
A method and medical device for discriminating an arrhythmia that includes an input circuit sensing cardiac signals and a microprocessor identifying an event associated with the sensed cardiac...
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7313438 |
Selective chamber ATP pacing
A method and system for delivering anti-tachycardia pacing (ATP) is disclosed. By comparing the time intervals between senses from both ventricles, the origin of a ventricular tachyarrhythmia may...
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7313436 |
Configurable cardioversion and defibrillation therapies in the presence of coexisting atrial and ventricular arrhythmia
An implantable cardioverter defibrillator system and method are provided having configurable shock therapies selected based on an evaluation of the atrial rhythm status following a ventricular...
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7308308 |
Method to monitor progression of atrial fibrillation and to detect its susceptibility for termination
A method and apparatus for monitoring a patient's cardiac electrical activity is disclosed. The method includes determining a characteristic of the cardiac signals during a detected episode of...
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7295873 |
Anti-tachycardia pacing method and apparatus for multi-chamber pacing
Improved methods and devices perform tachycardia detection and anti-tachycardia pacing (ATP) to convert a tachycardia (e.g., VT or AT) to normal sinus rhythm. According to one embodiment, an...
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7289847 |
Implantable cardiac device and method of treating atrial fibrillation
An apparatus and method of treating atrial fibrillation (AF) are provided. The apparatus includes means for detecting AF in a heart of a patient, means for classifying the AF as one of a plurality...
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