Maximum atrial tracking rate for cardiac rhythm management system
First Claim
1. A method including:
- detecting one or more atrial depolarizations;
measuring a subinterval of a patient'"'"'s cardiac cycle to obtain a hemodynamic maximum rate indicator;
establishing a maximum atrial tracking rate based at least in part on the hemodynamic maximum rate indicator; and
providing ventricular pacing, in response to one or more of the sensed atrial depolarizations, at a ventricular pacing rate that is limited by the maximum atrial tracking rate.
1 Assignment
0 Petitions
Accused Products
Abstract
A cardiac rhythm management system includes an operational mode in which ventricular pacing pulses are delivered at a rate that tracks a sinoatrial rate up to an appropriate maximum atrial tracking rate (MATR) value determined by the system. In one example, the MATR value is based on a patient activity level and a hemodynamic maximum rate (HMR) determined from a QRS-to-S2 interval, where S2 is an accelerometer-generated fiducial correlative to aortic valve closure (AVC). In a further example, a correlation between the QRS-to-S2 interval and heart rate is established, and the MATR is based on the patient activity level and heart rate. In a further example, a lower rate threshold for providing antitachyarrhythmia therapy is modified based on the MATR. For example, when the MATR exceeds a default value of the antitachyarrhythmia therapy lower rate threshold, the threshold tracks the MATR. In another example, the MATR is based on an active time between a QRS complex and a heart impedance signal maximum slope during the same cardiac cycle.
22 Citations
42 Claims
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1. A method including:
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detecting one or more atrial depolarizations; measuring a subinterval of a patient'"'"'s cardiac cycle to obtain a hemodynamic maximum rate indicator; establishing a maximum atrial tracking rate based at least in part on the hemodynamic maximum rate indicator; and providing ventricular pacing, in response to one or more of the sensed atrial depolarizations, at a ventricular pacing rate that is limited by the maximum atrial tracking rate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method including:
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measuring a subinterval of a patient'"'"'s cardiac cycle to obtain a hemodynamic maximum rate indicator; establishing a maximum atrial tracking rate based at least in part on the hemodynamic maximum rate indicator; providing a first tachyarrhythmia therapy rate threshold; and adjusting the first tachyarrhythmia therapy rate threshold when the maximum atrial tracking rate exceeds the first tachyarrhythmia therapy rate threshold. - View Dependent Claims (18)
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19. A method including:
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measuring a subinterval of a patient'"'"'s cardiac cycle to obtain a hemodynamic maximum rate indicator; establishing a maximum atrial tracking rate based at least in part on the hemodynamic maximum rate indicator; and increasing a rate threshold for providing an antitachyarrhythmia therapy to a value that is greater than or equal to the established maximum atrial tracking rate. - View Dependent Claims (20)
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21. A system including:
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means for measuring a subinterval of a patient'"'"'s cardiac cycle to obtain a hemodynamic maximum rate indicator; means for establishing a maximum atrial tracking rate based at least in part on the hemodynamic maximum rate indicator; means for providing a first tachyarrhythmia therapy rate threshold; and means for adjusting the first tachyarrhythmia therapy rate threshold when the maximum atrial tracking rate exceeds the first tachyarrhythmia therapy rate threshold. - View Dependent Claims (22)
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23. A system including:
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means for measuring a subinterval of a patient'"'"'s cardiac cycle to obtain a hemodynamic maximum rate indicator; means for establishing a maximum atrial tracking rate based at least in part on the hemodynamic maximum rate indicator; and means for increasing a rate threshold for providing an antitachyarrhythmia therapy to a value that is greater than or equal to the established maximum atrial tracking rate. - View Dependent Claims (24)
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25. A method including:
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measuring a subinterval of a patient'"'"'s cardiac cycle to obtain a hemodynamic maximum rate indicator; establishing a maximum atrial tracking rate based at least in part on the hemodynamic maximum rate indicator; adjusting a criteria for providing an antitachyarrhythmia therapy based on the established maximum atrial tracking rate; and providing an antitachyarrhythmia therapy in response to a detected tachyarrhythmia using the adjusted criteria for providing the antitachyarrhythmia therapy. - View Dependent Claims (26)
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27. A system including:
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means for measuring a subinterval of a patient'"'"'s cardiac cycle to obtain a hemodynamic maximum rate indicator; means for establishing a maximum atrial tracking rate based at least in part on the hemodynamic maximum rate indicator; means for adjusting a criteria for providing an antitachyarrhythmia therapy based on the established maximum atrial tracking rate; and means for providing an antitachyarrhythmia therapy in response to a detected tachyarrhythmia using the adjusted criteria for providing the antitachyarrhythmia therapy. - View Dependent Claims (28)
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29. A system including:
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means for detecting one or more atrial depolarizations; means for measuring a subinterval of a patient'"'"'s cardiac cycle to obtain a hemodynamic maximum rate indicator; means for establishing a maximum atrial tracking rate based at least in part on the hemodynamic maximum rate indicator; and means for providing ventricular pacing, in response to one or more of the sensed atrial depolarizations, at a ventricular pacing rate that is limited by the maximum atrial tracking rate. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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Specification