Automatic detection of premature ventricular complexes for heart rate turbulence measurements
First Claim
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1. A method for monitoring a cardiac signal in a patient, comprising:
- establishing a detection threshold requirement for discriminating premature ventricular contractions from premature atrial contractions;
sensing ventricular R-waves;
computing a morphology metric of an R-wave and a corresponding preceding morphology metric of an immediately preceding R-wave;
comparing one of a difference and a ratio of the R-wave morphology metric and the preceding R-wave morphology metric to the detection threshold;
detecting a premature ventricular contraction in response to the comparison meeting the detection threshold requirement; and
computing a measurement of the sensed ventricular R-waves in response to detecting the premature ventricular contraction.
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Abstract
A medical device system and method for monitoring a cardiac signal in a patient senses ventricular R-waves and computes a morphology metric of an R-wave and a corresponding preceding morphology metric of a preceding R-wave. One of a difference and a ratio of the R-wave morphology metric and the preceding R-wave morphology metric is compared to an established detection threshold for discriminating premature ventricular contractions from premature atrial contractions. A cardiac signal measurement is computed from the sensed R-waves in response to detecting a premature ventricular comparison based on the comparison.
19 Citations
24 Claims
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1. A method for monitoring a cardiac signal in a patient, comprising:
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establishing a detection threshold requirement for discriminating premature ventricular contractions from premature atrial contractions; sensing ventricular R-waves; computing a morphology metric of an R-wave and a corresponding preceding morphology metric of an immediately preceding R-wave; comparing one of a difference and a ratio of the R-wave morphology metric and the preceding R-wave morphology metric to the detection threshold; detecting a premature ventricular contraction in response to the comparison meeting the detection threshold requirement; and computing a measurement of the sensed ventricular R-waves in response to detecting the premature ventricular contraction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A medical device system for monitoring a cardiac signal in a patient, comprising:
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at least one electrode pair for sensing ventricular R-waves; and a processor configured to establish a detection threshold requirement for discriminating premature ventricular contractions from premature atrial contractions, compute a morphology metric of an R-wave and a corresponding preceding morphology metric of a preceding R-wave, compare one of a difference and a ratio of the R-wave morphology metric and the preceding R-wave morphology metric to the detection threshold, detect a premature ventricular contraction in response to the comparison meeting the detection threshold requirement, and compute a measurement of the sensed ventricular R-waves in response to detecting the premature ventricular contraction. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification