Method and apparatus for adjusting a blanking period during transitioning between operating states in a medical device
First Claim
1. A method of adjusting a blanking period in a medical device, comprising:
- sensing cardiac signals from a plurality of electrodes, the plurality of electrodes forming a plurality of sensing vectors;
determining a blanking period adjustment metric based on the cardiac signals sensed within a blanking period adjustment window extending from an end of a blanking period;
determining whether to increase the blanking period for analysis of the sensed cardiac signals in a first operating state based on the blanking period adjustment metric;
advancing from the first operating state to a second operating state in response to the analysis of the sensed cardiac signals in the first operating state indicating that a cardiac rhythm is a shockable ventricular fibrillation or a fast ventricular tachycardia or is not shockable;
determining whether the blanking period was increased for the analysis of the sensed cardiac signals in the first operating state; and
decreasing the blanking period for analysis of the cardiac signals in the second operating state in response to the blanking period being increased for the analysis of the cardiac signals in the first operating state.
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Accused Products
Abstract
A method and medical device for adjusting a blanking period that includes sensing cardiac signals from a plurality of electrodes, the plurality of electrodes forming a plurality of sensing vectors, determining whether to adjust a blanking period during a first operating state, advancing from the first operating state to a second operating state in response to the sensed cardiac signals, determining, while in the second operating state, whether the blanking period was adjusted while in the first operating state, and adjusting the blanking period while in the second operating state in response to the blanking period being adjusted while in the first operating state.
210 Citations
17 Claims
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1. A method of adjusting a blanking period in a medical device, comprising:
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sensing cardiac signals from a plurality of electrodes, the plurality of electrodes forming a plurality of sensing vectors; determining a blanking period adjustment metric based on the cardiac signals sensed within a blanking period adjustment window extending from an end of a blanking period; determining whether to increase the blanking period for analysis of the sensed cardiac signals in a first operating state based on the blanking period adjustment metric; advancing from the first operating state to a second operating state in response to the analysis of the sensed cardiac signals in the first operating state indicating that a cardiac rhythm is a shockable ventricular fibrillation or a fast ventricular tachycardia or is not shockable; determining whether the blanking period was increased for the analysis of the sensed cardiac signals in the first operating state; and decreasing the blanking period for analysis of the cardiac signals in the second operating state in response to the blanking period being increased for the analysis of the cardiac signals in the first operating state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A medical device, comprising:
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a plurality of electrodes capable of forming a plurality of sensing vectors for sensing cardiac signals; and a processor configured to determine a blanking period adjustment metric based on the cardiac signals sensed within a blanking period adjustment window extending from an end of a blanking period, determine whether to increase the blanking period for analysis of the sensed cardiac signals in a first operating state based on the blanking period adjustment metric, advance from the first operating state to a second operating state in response to the analysis of the sensed cardiac signals in the first operating state indicating that a cardiac rhythm is a shockable ventricular fibrillation or a fast ventricular tachycardia or is not shockable, determine whether the blanking period was increased for the analysis of the sensed cardiac signals in the first operating state, and decrease the blanking period for analysis of the cardiac signals in the second operating state in response to the blanking period being increased for the analysis of the cardiac signals in the first operating state. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A non-transitory, computer-readable storage medium storing instructions for causing a processor included in a medical device to perform a method for adjusting a blanking period, the method comprising:
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sensing cardiac signals from a plurality of electrodes, the plurality of electrodes forming a plurality of sensing vectors; determining a blanking period adjustment metric based on the cardiac signals sensed within a blanking period adjustment window extending from an end of a blanking period; determining whether to increase the blanking period for analysis of the sensed cardiac signals in a first operating state based on the blanking period adjustment metric; advancing from the first operating state to a second operating state in response to the analysis of the sensed cardiac signals in the first operating state indicating that a cardiac rhythm is a shockable ventricular fibrillation or a fast ventricular tachycardia or is not shockable; determining whether the blanking period was increased for the analysis of the sensed cardiac signals in the first operating state; and decreasing the blanking period for analysis of the cardiac signals in the second operating state in response to the blanking period being increased for the analysis of the cardiac signals in the first operating state.
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Specification