METHOD AND APPARATUS FOR VERIFYING A DETERMINED CARDIAC EVENT IN A MEDICAL DEVICE BASED ON DETECTED VARIATION IN HEMODYNAMIC STATUS
First Claim
1. A medical device, comprising:
- a plurality of sensors sensing cardiac signals;
a physiologic sensor sensing physiologic signals to generate a plurality of variation index samples corresponding to the sensed signals; and
a microprocessor detecting a cardiac event in response to the sensed cardiac signals, computing a variation index trend associated with a predetermined number of variation index samples of the plurality of variation index samples, determining whether the sensed cardiac signals are associated with noise in response to the computed variation index, and confirming the determined cardiac event in response to the sensed cardiac signals not being associated with noise.
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Abstract
A method and apparatus for verifying a determined cardiac event in a medical device based on detected variation in hemodynamic status that includes a plurality of sensors sensing cardiac signals, and a physiologic sensor sensing physiologic signals to generate a plurality of variation index samples corresponding to the sensed signals. A microprocessor detects a cardiac event in response to the sensed cardiac signals, computes a variation index trend associated with a predetermined number of variation index samples of the plurality of variation index samples, determines whether the sensed cardiac signals are associated with noise in response to the computed variation index, and confirms the determined cardiac event in response to the sensed cardiac signals not being associated with noise.
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Citations
20 Claims
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1. A medical device, comprising:
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a plurality of sensors sensing cardiac signals;
a physiologic sensor sensing physiologic signals to generate a plurality of variation index samples corresponding to the sensed signals; and
a microprocessor detecting a cardiac event in response to the sensed cardiac signals, computing a variation index trend associated with a predetermined number of variation index samples of the plurality of variation index samples, determining whether the sensed cardiac signals are associated with noise in response to the computed variation index, and confirming the determined cardiac event in response to the sensed cardiac signals not being associated with noise. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of determining a cardiac event in a medical device, comprising:
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sensing cardiac signals from a plurality of electrodes;
determining the cardiac event in response to the sensed first cardiac signals;
sensing physiologic signals and acquiring a plurality of variation index samples corresponding to the sensed signals;
computing a variation index trend associated with a predetermined number of variation index samples of the plurality of variation index samples;
determining whether the sensed cardiac signals are associated with noise in response to the computed variation index; and
confirming the determined cardiac event in response to the sensed cardiac signals not being associated with noise. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method of verifying a cardiac event in a medical device, comprising:
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sensing physiologic signals and acquiring a plurality of variation index samples corresponding to the sensed physiological signals;
computing a variation index trend associated with a predetermined number of variation index samples of the plurality of variation index samples;
determining a deviation of the predetermined number of variation index samples; and
verifying the cardiac event in response to the determined deviation. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification