Method and system for adjusting a stimulation rate of an implantable medical device
First Claim
1. An implantable medical device comprising:
- a lead including electrodes configured to be positioned within a heart to sense cardiac signals of the heart;
a detector to analyze the cardiac signals of the heart and detect atrial arrhythmias;
a pulse generator electrically coupled to the lead and adapted to deliver stimulus pulses to the heart through at least one of the electrodes;
a cardiac signal module to monitor the cardiac signals and direct the pulse generator to deliver one or more of the stimulus pulses to the heart at a stimulation rate based on the cardiac signals during a detected atrial arrhythmia;
a fusion detection module to identify a presence of fusion-based behavior of the heart that is associated with delivery of the one or more of the stimulus pulses during the detected atrial arrhythmia; and
a rate modification module to adjust the stimulation rate based on the presence of the fusion-based behavior.
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Accused Products
Abstract
An implantable medical device includes a lead, a pulse generator, a cardiac signal module, a fusion detection module and a rate modification module. The lead includes electrodes that are configured to be positioned within a heart to sense cardiac signals of the heart. The pulse generator delivers stimulus pulses to the heart through at least one of the electrodes. The cardiac signal module monitors the cardiac signals and directs the pulse generator to deliver one or more of the stimulus pulses to the heart at a stimulation rate based on the cardiac signals. The fusion detection module identifies a presence of fusion-based behavior of the heart that is associated with delivery of the one or more of the stimulus pulses. The rate modification module then adjusts the stimulation rate based on the presence of the fusion-based behavior.
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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 to sense cardiac signals of the heart; a detector to analyze the cardiac signals of the heart and detect atrial arrhythmias; a pulse generator electrically coupled to the lead and adapted to deliver stimulus pulses to the heart through at least one of the electrodes; a cardiac signal module to monitor the cardiac signals and direct the pulse generator to deliver one or more of the stimulus pulses to the heart at a stimulation rate based on the cardiac signals during a detected atrial arrhythmia; a fusion detection module to identify a presence of fusion-based behavior of the heart that is associated with delivery of the one or more of the stimulus pulses during the detected atrial arrhythmia; and a rate modification module to adjust the stimulation rate based on the presence of the fusion-based behavior. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for adjusting a stimulation rate at which an implantable medical device applies stimulus pulses to a heart during an atrial arrhythmia, the method comprising:
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monitoring cardiac signals of the heart; analyzing the cardiac signals to detect the atrial arrhythmia; delivering one or more stimulus pulses to the heart during the atrial arrhythmia at the stimulation rate based on the cardiac signals; identifying a presence of fusion-based behavior of the heart that is associated with delivery of the one or more of the stimulus pulses during the atrial arrhythmia; and adjusting the stimulation rate based on the presence of the fusion-based behavior. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A computer readable storage medium for use in an implantable medical device having a lead including electrodes configured to be positioned within a heart, a pulse generator configured to deliver stimulus pulses to the heart, and a microcontroller, the computer readable storage medium comprising instructions to direct the microcontroller to:
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monitor cardiac signals of the heart using one or more of the electrodes; detect atrial arrhythmias from the cardiac signals; instruct the pulse generator to deliver one or more stimulus pulses to the heart at a stimulation rate using at least one of the electrodes when consecutive cardiac events occur outside of an escape interval during the atrial arrhythmia; identify a presence of fusion-based behavior of the heart that is associated with delivery of the one or more of the stimulus pulses; and adjust the stimulation rate based on the presence of the fusion-based behavior.
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Specification