Multi-parameter prediction of acute cardiac episodes and attacks
First Claim
1. A medical device system comprising:
- sensing circuitry configured to generate one or more physiological signals of a patient; and
processing circuitry that, for each of a plurality of periods, is configured to;
determine a respective value for each of a plurality of patient parameters, wherein, for one or more of the plurality of patient parameters, the respective values are determined based on the one or more physiological signals generated during the period;
for each of the plurality of patient parameters, determine a difference metric for a current period for each of the plurality of periods based on a value of the patient parameter determined for the current period and a value of the patient parameter determined for an immediately preceding period of the plurality periods;
determine a score for the current period based on a sum of the difference metrics for the current period for the one or more of the plurality of patient parameters;
determine a threshold for the current period based on scores determined for N periods of the plurality of periods that precede the current period, wherein N is an integer constant;
compare the score for the current period to the threshold for the current period; and
determine whether to generate an alert indicating that an acute cardiac event of the patient is predicted based on the comparison.
1 Assignment
0 Petitions
Accused Products
Abstract
In some examples, processing circuitry of a medical device system determines, for each of a plurality of patient parameters, a difference metric for a current period based on a value of a patient parameter determined for the current period and a value of the patient parameter determined for an immediately preceding period, and determines a score for the current period based on a sum of the difference metrics for at least some of the plurality of patient parameters. The processing circuitry determines a threshold for the current period based on scores determined for N periods that precede the current period, compares the score for the current period to the threshold, and determines whether to generate an alert indicating that an acute cardiac event of the patient, e.g., ventricular tachyarrhythmia, is predicted, and/or deliver a therapy configured to prevent the acute cardiac event, based on the comparison.
31 Citations
31 Claims
-
1. A medical device system comprising:
-
sensing circuitry configured to generate one or more physiological signals of a patient; and processing circuitry that, for each of a plurality of periods, is configured to; determine a respective value for each of a plurality of patient parameters, wherein, for one or more of the plurality of patient parameters, the respective values are determined based on the one or more physiological signals generated during the period; for each of the plurality of patient parameters, determine a difference metric for a current period for each of the plurality of periods based on a value of the patient parameter determined for the current period and a value of the patient parameter determined for an immediately preceding period of the plurality periods; determine a score for the current period based on a sum of the difference metrics for the current period for the one or more of the plurality of patient parameters; determine a threshold for the current period based on scores determined for N periods of the plurality of periods that precede the current period, wherein N is an integer constant; compare the score for the current period to the threshold for the current period; and determine whether to generate an alert indicating that an acute cardiac event of the patient is predicted based on the comparison. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. A method comprising:
-
generating, by sensing circuitry of a medical device system, one or more physiological signals of a patient; and for each of a plurality of periods, by processing circuitry of the medical device system; determining a respective value for each of a plurality of patient parameters, wherein, for one or more of the plurality of patient parameters, the respective values are determined based on the one or more physiological signals generated during the period; for each of the plurality of patient parameters, determining a difference metric for a current period for each of the plurality of periods based on a value of the patient parameter determined for the current period and a value of the patient parameter determined for an immediately preceding period of the plurality periods; determining a score for the current period based on a sum of the difference metrics for the current period for the one or more of the plurality of patient parameters; determining a threshold for the current period based on scores determined for N periods of the plurality of periods that precede the current period, wherein N is an integer constant; comparing the score for the current period to the threshold for the current period; and determining whether to generate an alert indicating that an acute cardiac event of the patient is predicted based on the comparison. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
-
-
30. A medical device system comprising:
-
means for generating one or more physiological signals of a patient; and for each of a plurality of periods; means for determining a respective value for each of a plurality of patient parameters, wherein, for one or more of the plurality of patient parameters, the respective values are determined based on the one or more physiological signals generated during the period; for each of the plurality of patient parameters, means for determining a difference metric for a current period for each of the plurality of periods based on a value of the patient parameter determined for the current period and a value of the patient parameter determined for an immediately preceding period of the plurality periods; means for determining a score for the current period based on a sum of the difference metrics for the current period for the one or more of the plurality of patient parameters; means for determining a threshold for the current period based on scores determined for N periods of the plurality of periods that precede the current period, wherein N is an integer constant; means for comparing the score for the current period to the threshold for the current period; and means for determining whether to generate an alert indicating that an acute cardiac event of the patient is predicted based on the comparison.
-
-
31. A non-transitory computer-readable storage medium comprising instructions, that when executed by processing circuitry of a medical device system, cause the medical device system to:
-
receive one or more physiological signals of a patient; and for each of a plurality of periods; determine a respective value for each of a plurality of patient parameters, wherein, for one or more of the plurality of patient parameters, the respective values are determined based on the one or more physiological signals generated during the period; for each of the plurality of patient parameters, determine a difference metric for a current period for each of the plurality of periods based on a value of the patient parameter determined for the current period and a value of the patient parameter determined for an immediately preceding period of the plurality periods; determine a score for the current period based on a sum of the difference metrics for the current period for the one or more of the plurality of patient parameters; determine a threshold for the current period based on scores determined for N periods of the plurality of periods that precede the current period, wherein N is an integer constant; compare the score for the current period to the threshold for the current period; and determine whether to generate an alert indicating that an acute cardiac event of the patient is predicted based on the comparison.
-
Specification