History-dependent pacing interval determination for antitachycardia pacing
First Claim
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1. A method, comprising:
- detecting a tachycardia within a heart;
estimating an action potential duration based on a heart rate over a period of time prior to the detection of the tachycardia;
applying anti-tachycardia pacing pulses to the heart; and
setting a pacing interval of the anti-tachycardia pacing pulses based on the estimate of action potential duration within the heart during application of anti-tachycardia pacing pulses.
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Abstract
A method and device for delivering anti-tachycardia pacing pulses that may be used to treat episodes of atrial or ventricular tachycardia. Episodes of atrial or ventricular tachycardia can occur while the heart is at a normal rhythm or an accelerated rhythm. The method and device is directed to determining an estimate of action potential duration of a heart that experiences episodes of atrial or ventricular tachycardia for use in determining a pacing interval for anti-tachycardia pacing pulses that may more effectively terminate the tachycardia.
39 Citations
26 Claims
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1. A method, comprising:
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detecting a tachycardia within a heart; estimating an action potential duration based on a heart rate over a period of time prior to the detection of the tachycardia; applying anti-tachycardia pacing pulses to the heart; and setting a pacing interval of the anti-tachycardia pacing pulses based on the estimate of action potential duration within the heart during application of anti-tachycardia pacing pulses. - View Dependent Claims (4, 5, 8)
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2. A method comprising:
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detecting a tachycardia within a heart; applying anti-tachycardia pacing pulses to the heart; and setting a pacing interval of the anti-tachycardia pacing pulses based on an estimate of action potential duration within the heart during application of the anti-tachycardia pacing pulses, wherein setting a pacing interval of the anti-tachycardia pacing pulses based on an estimate of action potential duration includes estimating the action potential duration based on heart rate over a period of time prior to the detection of the tachycardia. - View Dependent Claims (3)
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6. A method, comprising:
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detecting a tachycardia within a heart; applying anti-tachycardia pacing pulses to the heart; setting a pacing interval of the anti-tachycardia pacing pulses based on an estimate of action potential duration within the heart during application of the anti-tachycardia pacing pulses; and detecting P-waves within an atrium of the heart, wherein setting a pacing interval of the anti-tachycardia pacing pulses based on an estimate of action potential duration includes estimating the action potential duration based on a time interval between detected P-waves.
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7. A method comprising:
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detecting a tachycardia within a heart; applying anti-tachycardia pacing pulses to the heart;
setting a pacing interval of the anti-tachycardia pacing pulses based on an estimate of action potential duration within the heart during application of the anti-tachycardia pacing pulses; anddetecting R-waves within a ventricle of the heart, wherein setting a pacing interval of the anti-tachycardia pacing pulses based on an estimate of action potential duration includes estimating the action potential duration based on a time interval between detected R-waves, and wherein detecting the tachycardia within the heart includes detecting the tachycardia within the ventricle of the heart. - View Dependent Claims (9)
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10. A device comprising:
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at least one electrode to detect electrical activity associated with a tachycardia; and a processor that determines an estimate of action potential duration and sets a pacing interval of anti-tachycardia pacing pulses based on the estimate of action potential duration within a heart at a time of application of the anti-tachycardia pacing pulses, wherein a processor that sets a pacing interval of anti-tachycardia pacing pulses based on the estimate of action potential duration includes a processor that detects a tachycardia in response to the detected electrical activity and estimates the action potential duration based on heart rate over a period of time prior to the detection of the tachycardia. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A computer-readable medium comprising instructions for causing a programmable processor to:
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detect a tachycardia within a heart; estimate an action potential duration based on a heart rate over a period of time prior to the detection of the tachycardia; apply anti-tachycardia pacing pulses to the heart; and set a pacing interval of the anti-tachycardia pacing pulses based on the estimate of action potential duration within the heart during application of anti-tachycardia pacing pulses. - View Dependent Claims (23, 24, 25, 26)
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Specification