System for cardiac condition characterization using electrophysiological signal data
First Claim
1. A system comprising:
- an interface configured to receive signal data representing an electrical signal indicating electrical activity of a patient heart over a plurality of heart beat cycles;
a signal processor for configured to;
determine a time interval from an S wave to a T wave based on the signal data;
determine a time interval from a Q wave to an S wave based on the signal data;
calculate a first comparison value comparing the time interval from the S wave to the T wave to the time interval from the Q wave to the S wave; and
determine a cardiac condition based on the first comparison value; and
a patient monitor configured to, in response to said determination of the cardiac condition, generate an alert message associated with the cardiac condition.
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Accused Products
Abstract
A system for heart performance characterization and abnormality detection includes an interface for receiving signal data representing an electrical signal indicating electrical activity of a patient heart over multiple heart beat cycles. A signal processor uses the received signal data in calculating at least one of, (a) a first signal characteristic value substantially comprising a ratio of a time interval from S wave to T wave, to a time interval from Q wave to S wave and (b) a second signal characteristic value substantially comprising a ratio of a T wave base voltage from a peak of a T wave to a zero base reference voltage, to an R wave base voltage from a peak of an R wave to a zero base reference voltage. A comparator compares at least one of the first and second characteristic values with a threshold value to provide a comparison indicator. A patient monitor in response to the comparison indicator indicating a calculated signal characteristic value exceeds the threshold value, generates an alert message associated with the threshold.
46 Citations
19 Claims
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1. A system comprising:
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an interface configured to receive signal data representing an electrical signal indicating electrical activity of a patient heart over a plurality of heart beat cycles; a signal processor for configured to; determine a time interval from an S wave to a T wave based on the signal data; determine a time interval from a Q wave to an S wave based on the signal data; calculate a first comparison value comparing the time interval from the S wave to the T wave to the time interval from the Q wave to the S wave; and determine a cardiac condition based on the first comparison value; and a patient monitor configured to, in response to said determination of the cardiac condition, generate an alert message associated with the cardiac condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method comprising:
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receiving signal data representing an electrical signal indicating electrical activity of a patient heart over a plurality of heart beat cycles; determining a time interval from an S wave to a T wave based on the signal data; determining a time interval from a Q wave to an S wave based on the signal data; calculating a first comparison value comparing the time interval from the S wave to the T wave to the time interval from the Q wave to the S wave; and determining a cardiac condition based on the first comparison value in response to said determination of the cardiac condition, generating an alert message associated with the cardiac condition.
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Specification