Method and system for automatically switching between modes of an implantable medical device
First Claim
1. An implantable medical device comprising:
- a lead including electrodes configured to be positioned within a heart, at least one of the electrodes being capable of sensing cardiac signals;
a pulse generator configured to deliver a stimulus pulse through at least one of the electrodes;
an autocapture module configured to sense an evoked response after delivery of the stimulus pulse when operating in an autocapture mode;
an autothreshold module configured to perform a threshold search when operating in an autothreshold mode;
a fusion detection configured module to identify fusion-based behavior in the heart; and
a control module to automatically switch between the autothreshold and autocapture modes based on a presence of the fusion-based behavior.
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Accused Products
Abstract
An implantable medical device includes a lead, a pulse generator, an autocapture module, an autothreshold module, a fusion detection module, and a control module. The lead includes electrodes configured to be positioned within a heart. At least one of the electrodes is capable of sensing cardiac signals. The pulse generator delivers a stimulus pulse through at least one of the electrodes. The autocapture module senses an evoked response of the heart after delivery of the stimulus pulse when operating in an autocapture mode. The autothreshold module performs a threshold search when operating in an autothreshold mode. The fusion detection module identifies fusion-based behavior in the heart. The control module automatically switches between the autothreshold and autocapture modes based on a presence of the fusion-based behavior.
15 Citations
20 Claims
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1. An implantable medical device comprising:
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a lead including electrodes configured to be positioned within a heart, at least one of the electrodes being capable of sensing cardiac signals; a pulse generator configured to deliver a stimulus pulse through at least one of the electrodes; an autocapture module configured to sense an evoked response after delivery of the stimulus pulse when operating in an autocapture mode; an autothreshold module configured to perform a threshold search when operating in an autothreshold mode; a fusion detection configured module to identify fusion-based behavior in the heart; and a control module to automatically switch between the autothreshold and autocapture modes based on a presence of the fusion-based behavior. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for automatically switching between autocapture and autothreshold modes in an implantable medical device, the method comprising:
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delivering a stimulus pulse to a heart; identifying fusion-based behavior in the heart in response to the stimulus pulse; automatically switching between the autocapture and autothreshold modes based on a presence of the fusion-based behavior; when in the autocapture mode, sensing an evoked response after delivery of a stimulus pulse; and when in the autothreshold mode, performing a threshold search. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A non-transitory computer readable storage medium for an implantable medical device having a lead with electrodes configured to be positioned within a heart to sense cardiac signals, a pulse generator, and a microcontroller, the non-transitory computer readable storage medium comprising instructions:
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to direct the pulse generator to deliver a stimulus pulse to the heart; and to direct the microcontroller to; identify fusion-based behavior in the heart in response to the stimulus pulse; automatically switch between an autocapture mode and an autothreshold mode based on a presence of the fusion-based behavior; when in the autocapture mode, sense an evoked response after delivery of the stimulus pulse; and when in the autothreshold mode, perform a threshold search. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification