GRADUALLY SYNCHRONIZED SIMULTANEOUS ATRIAL AND VENTRICULAR PACING FOR CARDIAC RHYTHM DISCRIMINATION
First Claim
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1. A cardiac medical device for delivering anti-tachycardia pacing, comprising:
- a plurality of electrodes operatively connected to the cardiac medical device and implantable within a patient to detect patient parameters in an atrium and a ventricle and to deliver therapy in the atrium and in the ventricle; and
a controller positioned within the cardiac medical device and electrically connected to the plurality of electrodes, the controller controlling delivery of a plurality of pacing pulses via the plurality of electrodes in response to detection of a tachycardia via the electrodes, the plurality of pacing pulses including atrial pacing pulses and ventricular pacing pulses, wherein one or more of the atrial pacing pulses is delivered out of phase with a corresponding one or more of the ventricular pacing pulses, and wherein the controller gradually shifts a phase difference between the delivered atrial pacing pulses and the delivered ventricular pacing pulses over a predetermined number of pacing cycles until the pacing pulses are delivered in phase.
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Abstract
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. The pacing pulses may be synchronized in a gradual manner so that simultaneous delivery of the pulses is ultimately achieved at reduced risk of inducing atria arrhythmia. The pacing pulses may also be synchronized immediately after a determination is made whether simultaneous pacing purses will be delivered in the vulnerable regions of the cardiac cycle.
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Citations
20 Claims
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1. A cardiac medical device for delivering anti-tachycardia pacing, comprising:
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a plurality of electrodes operatively connected to the cardiac medical device and implantable within a patient to detect patient parameters in an atrium and a ventricle and to deliver therapy in the atrium and in the ventricle; and a controller positioned within the cardiac medical device and electrically connected to the plurality of electrodes, the controller controlling delivery of a plurality of pacing pulses via the plurality of electrodes in response to detection of a tachycardia via the electrodes, the plurality of pacing pulses including atrial pacing pulses and ventricular pacing pulses, wherein one or more of the atrial pacing pulses is delivered out of phase with a corresponding one or more of the ventricular pacing pulses, and wherein the controller gradually shifts a phase difference between the delivered atrial pacing pulses and the delivered ventricular pacing pulses over a predetermined number of pacing cycles until the pacing pulses are delivered in phase. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A computer-readable medium programmed with instructions for delivering anti-tachycardia pacing, the medium comprising instructions for causing a programmable processor to:
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monitor patient parameters in an atrium and a ventricle to detect a tachycardia; deliver pacing pulses to the atrium and the ventricle each pacing cycle upon detection of the tachycardia, one or more initial atrial pacing pulses being delivered out of phase with corresponding one or more initial ventricular pacing pulses; and gradually shift the phase difference between the pacing pulses delivered in the atrium and the ventricle over a quantity of pacing cycles until the pacing pulses are delivered together in phase each pacing cycle. - View Dependent Claims (14, 15, 16, 17)
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18. A method of providing simultaneous atrial and ventricular pacing, comprising:
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monitoring patient parameters in an atrium and a ventricle; detecting an abnormal or suspected abnormal heart rhythm in one of the atrium and the ventricle; determining whether delivery of simultaneous atrial and ventricular pacing pulses falls within vulnerable regions of the cardiac cycle; delivering pacing pulses to the atrium and the ventricle each pacing cycle, the atrial pulses being delivered out of phase with the corresponding ventricular pacing pulses if simultaneous delivery of such atrial and corresponding ventricular pacing pulses falls within vulnerable regions of the cardiac cycle; gradually shifting any out of phase atrial and ventricular pacing pulses relative to each other over a quantity pacing cycles until the pacing pulses are delivered in phase each pacing cycle; and delivering atrial and ventricular pacing pulses in phase. - View Dependent Claims (19, 20)
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Specification