Method and apparatus for detecting noise in an implantable medical device
First Claim
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1. An implantable medical device, comprising:
- sensing circuitry for receiving a cardiac signal, sensing cardiac depolarization signals and measuring depolarization intervals occurring between the sensed cardiac depolarization signals;
an arrhythmia detection module for detecting arrhythmia events from the measured depolarization intervals; and
a noise detection module for sensing a noise signal in the cardiac electrical signal and declaring a depolarization interval defined by a first sensed cardiac depolarization signal and a next sensed cardiac depolarization signal as a noisy interval in response to the noise signal being sensed during the depolarization interval;
wherein the detection circuitry configured to inhibit detecting an arrhythmia event in response to the noisy depolarization interval.
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Abstract
An implantable medical device and associated method monitor a physiological signal for sensing physiological events and detecting a physiological condition in response to the sensed physiological events. The device senses a first event from the physiological signal, senses a noise signal in the physiological signal and senses a next event from the physiological signal wherein the first event and the next event define a signal interval. The signal interval is declared as a noisy interval in response to the sensed noise signal.
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Citations
28 Claims
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1. An implantable medical device, comprising:
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sensing circuitry for receiving a cardiac signal, sensing cardiac depolarization signals and measuring depolarization intervals occurring between the sensed cardiac depolarization signals; an arrhythmia detection module for detecting arrhythmia events from the measured depolarization intervals; and a noise detection module for sensing a noise signal in the cardiac electrical signal and declaring a depolarization interval defined by a first sensed cardiac depolarization signal and a next sensed cardiac depolarization signal as a noisy interval in response to the noise signal being sensed during the depolarization interval; wherein the detection circuitry configured to inhibit detecting an arrhythmia event in response to the noisy depolarization interval. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for use in an implantable medical device, comprising:
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monitoring a physiological signal for sensing physiological events and detecting a physiological condition in response to the sensed physiological events; sensing a first event from the physiological signal; sensing a noise signal in the physiological signal; sensing a next event from the physiological signal wherein the first event and the next event define a signal interval; declaring the signal interval as a noisy interval in response to the sensed noise signal occurring after the first event and prior to the next event; and inhibiting detecting the physiological condition in response to the declared noisy interval. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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Specification