Atrial arrhythmia episode detection in a cardiac medical device
First Claim
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1. A method of detecting an atrial fibrillation (AF) event in a medical device, comprising:
- sensing a cardiac signal;
identifying a plurality of R-waves in the cardiac signal;
determining a plurality of RR-intervals based on the plurality of identified R-waves in the sensed cardiac signal;
detecting the AF event based on at least the plurality of determined RR-intervals;
iteratively sensing a predetermined number of P-waves in response to detecting the AF event;
determining one or more P-wave parameters associated with each of the iteratively sensed predetermined number of P-waves; and
confirming the AF event based on the P-wave parameters of the iteratively sensed predetermined number of P-waves.
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Abstract
A method and medical device for detecting a cardiac event that includes sensing a cardiac signal, determining RR-intervals in response to the sensed cardiac signal, detecting a cardiac event in response to the RR-intervals, iteratively sensing a predetermined number of P-waves in response to detecting the cardiac event, and confirming the cardiac event in response to the iteratively sensed P-waves.
120 Citations
25 Claims
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1. A method of detecting an atrial fibrillation (AF) event in a medical device, comprising:
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sensing a cardiac signal; identifying a plurality of R-waves in the cardiac signal; determining a plurality of RR-intervals based on the plurality of identified R-waves in the sensed cardiac signal; detecting the AF event based on at least the plurality of determined RR-intervals; iteratively sensing a predetermined number of P-waves in response to detecting the AF event; determining one or more P-wave parameters associated with each of the iteratively sensed predetermined number of P-waves; and confirming the AF event based on the P-wave parameters of the iteratively sensed predetermined number of P-waves. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A medical device for detecting an AF event, comprising:
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a plurality of electrodes sensing a cardiac signal; and a processor configured to identify a plurality of R-waves in the cardiac signal, determine a plurality of RR-intervals in based on the plurality of identified R-waves the sensed cardiac signal, detect the AF based on at least the plurality of determined RR-intervals, iteratively sense a predetermined number of P-waves in response to detecting the AF event, determine one or more P-wave parameters associated with each of the iteratively sensed predetermined number of P-waves and confirm the AF event based on the P-wave parameters of the iteratively sensed predetermined number of P-waves. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A non-transitory, computer-readable storage medium storing instructions for causing a processor included in a medical device to perform a method for determining an atrial fibrillation (AF) event, the method comprising:
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sensing a cardiac signal; identifying a plurality of R-waves in the cardiac signal; determining a plurality of RR-intervals based on the plurality of identified R-waves in the sensed cardiac signal; detecting the AF event based on at least the plurality of determined RR-intervals; iteratively sensing a predetermined number of P-waves in response to detecting the AF event; determining one or more P-wave parameters associated with each of the iteratively sensed predetermined number of P-waves; and confirming the AF event based on the P-wave parameters of the iteratively sensed predetermined number of P-waves.
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20. A cardiac medical device for detecting a cardiac event and delivering therapy for treating atrial fibrillation, comprising:
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an electrode to sense a cardiac signal associated only with a ventricle of a heart and deliver a therapy to the heart; a processor configured to determine RR-intervals in response to the sensed cardiac signal, detect a cardiac event in response to the RR-intervals, iteratively sense a predetermined number of P-waves in response to detecting the cardiac event, and confirm the cardiac event in response to the iteratively sensed P-waves; and an output circuit to deliver therapy to the heart via the electrode in response to the confirming the cardiac event. - View Dependent Claims (21, 22, 23, 24, 25)
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Specification