Ventricular event filtering for an implantable medical device
First Claim
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1. An implantable medical system comprising:
- means for delivering atrial pacing in a first, atrial pacing mode wherein ventricular pacing is precluded for a complete A-A cardiac cycle following delivery of an atrial pacing pulse;
means for detecting the presence or absence of AV conduction for each said complete A-A cardiac cycle during delivery of the first pacing mode;
means for automatically switching from the first pacing mode to a second, dual chamber pacing mode comprising delivery of ventricular pacing pulses subsequent to a said complete A-A cardiac cycle wherein AV conduction is absent as determined by the means for detecting; and
means for switching from the second pacing mode to the first pacing mode if AV conduction is detected.
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Abstract
Pacing parameters are provided to address cross talk and intrinsic ventricular events occurring within a predefined blanking period following an atrial event. The parameters are used in conjunction with protocol for minimizing or reducing ventricular pacing, wherein ignoring intrinsic ventricular events during the blanking period might otherwise affect the performance of the protocol.
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Citations
20 Claims
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1. An implantable medical system comprising:
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means for delivering atrial pacing in a first, atrial pacing mode wherein ventricular pacing is precluded for a complete A-A cardiac cycle following delivery of an atrial pacing pulse; means for detecting the presence or absence of AV conduction for each said complete A-A cardiac cycle during delivery of the first pacing mode; means for automatically switching from the first pacing mode to a second, dual chamber pacing mode comprising delivery of ventricular pacing pulses subsequent to a said complete A-A cardiac cycle wherein AV conduction is absent as determined by the means for detecting; and means for switching from the second pacing mode to the first pacing mode if AV conduction is detected. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of cardiac pacing comprising:
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implementing a first, atrial pacing mode, wherein ventricular pacing is precluded for a complete A-A cardiac cycle following delivery of an atrial pacing pulse; sensing for an AV block condition; switching to a second, dual-chamber pacing mode automatically if said AV block condition is sensed; sensing for intrinsic AV conduction while operating in the second pacing mode; and resuming the first pacing mode if intrinsic AV conduction is sensed. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A non-transitory computer readable medium comprising instructions for causing an implantable medical device to perform the following steps:
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implementing a first, atrial pacing mode, wherein ventricular pacing is precluded for a complete A-A cardiac cycle following delivery of an atrial pacing pulse; sensing for an AV block condition; mode switching to a second, dual-chamber pacing mode that provides ventricular pacing if said AV block condition is sensed; sensing for intrinsic AV conduction while operating in the second racing mode; and resuming the atrial based pacing mode if intrinsic AV conduction is sensed. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification