Method and apparatus for predicting arrhythmias using diurnal heart rate
First Claim
1. A method of predicting the occurrence of arrhythmias in a patient, comprising:
- monitoring heart rate;
determining the heart rate corresponding to a plurality of predetermined time periods; and
predicting an arrhythmia event in response to the determined heart rates.
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Abstract
A method of predicting an arrhythmia, such as ventricular tachycardia, for example, in a medical device using a quantitative measure in order to allow assessment of patient risk and to enable preventative interventions by the device and clinicians. The trending of day and night average heart rates, along with patient physical activity can be analyzed to provide prediction of impending arrhythmia within weeks. By examining day and night average heart rate for crossover points, where the night heart rate equals or exceeds the day rate, and monitoring for a concomitant elevation in the night heart rate from a reference value, specific days heralding an increased risk of arrhythmia can be determined and therapy can be updated accordingly
49 Citations
6 Claims
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1. A method of predicting the occurrence of arrhythmias in a patient, comprising:
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monitoring heart rate;
determining the heart rate corresponding to a plurality of predetermined time periods; and
predicting an arrhythmia event in response to the determined heart rates. - View Dependent Claims (2, 3, 4, 5)
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6. A method of predicting the occurrence of arrhythmias in a patient, comprising:
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determining a first average rate corresponding to a first portion of a day and a second average rate corresponding to a second portion of the day;
determining an average activity level over a predetermined period of time;
calculating a first reference value associated with the first average rate and a second reference value associated with the second average rate;
determining whether the difference between the first average rate and the second average rate is less than a diurnal threshold;
determining whether the difference between the second average rate and the second reference value is greater than a second average rate threshold; and
determining whether the difference between first average rate and the first reference value is greater than a first average rate threshold.
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Specification