Sequential discrimination approach for detecting treatable cardiac rhythms
First Claim
1. A method of classifying cardiac signals according to a cardiac event type, comprising:
- establishing a plurality of population-based thresholds corresponding to a plurality of cardiac signal morphology metrics for discriminating between a first cardiac event and a second cardiac event;
establishing a first threshold criterion for discriminating cardiac events, the first threshold criterion comprising a comparison between a cardiac signal morphology metric and one established population-based threshold of the established plurality of population-based thresholds;
sensing a cardiac signal segment in a patient;
applying the first threshold criterion to the sensed cardiac signal segment;
classifying the cardiac signal segment only in response to the applying the first threshold criterion being satisfied;
establishing a patient-specific threshold in response to the sensed cardiac signal segment not being classified after applying the first threshold criterion;
computing a metric of the sensed cardiac signal segment and comparing the metric to the established patient-specific threshold; and
classifying the sensed signal segment in response to the comparing of the metric to the established patient-specific threshold.
1 Assignment
0 Petitions
Accused Products
Abstract
A system and method for use in a medical device for discriminating cardiac events establishes population-based thresholds corresponding to cardiac signal morphology metrics for discriminating between a first cardiac event and a second cardiac event. A population-based threshold criterion for discriminating cardiac events is established. The population-based threshold criterion is applied to a cardiac signal segment and the segment is classified if the criterion is satisfied. A patient-specific threshold is established in response to the sensed cardiac signal segment not being classified after applying the population-based threshold criterion. The sensed signal segment is classified in response to the patient-specific threshold comparison.
-
Citations
25 Claims
-
1. A method of classifying cardiac signals according to a cardiac event type, comprising:
-
establishing a plurality of population-based thresholds corresponding to a plurality of cardiac signal morphology metrics for discriminating between a first cardiac event and a second cardiac event; establishing a first threshold criterion for discriminating cardiac events, the first threshold criterion comprising a comparison between a cardiac signal morphology metric and one established population-based threshold of the established plurality of population-based thresholds; sensing a cardiac signal segment in a patient; applying the first threshold criterion to the sensed cardiac signal segment; classifying the cardiac signal segment only in response to the applying the first threshold criterion being satisfied; establishing a patient-specific threshold in response to the sensed cardiac signal segment not being classified after applying the first threshold criterion; computing a metric of the sensed cardiac signal segment and comparing the metric to the established patient-specific threshold; and classifying the sensed signal segment in response to the comparing of the metric to the established patient-specific threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A medical device system for classifying cardiac signals according to a cardiac event type, comprising:
-
a processor configured to establish a plurality of population-based thresholds corresponding to a plurality of cardiac signal morphology metrics for discriminating between a first cardiac event and a second cardiac event, and establish a first threshold criterion for discriminating cardiac events, the first threshold criterion comprising a comparison between a cardiac signal morphology metric and one established population-based threshold of the plurality of population-based thresholds; a plurality of electrodes for sensing a cardiac signal segment; a programmable memory storing the first population-based threshold criterion; and a controller configured to; apply the first threshold criterion to the sensed cardiac signal segment; classify the sensed cardiac signal segment only in response to the applying the first threshold criterion being satisfied; establish a patient-specific threshold in response to the sensed cardiac signal segment not being classified after applying the first threshold criterion; compute a metric of the sensed cardiac signal segment and comparing the metric to the established patient-specific threshold; and classify the sensed cardiac signal segment in response to the comparing of the metric to the established patient-specific threshold. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
-
-
25. A non-transitory computer-readable medium storing a set of instructions which cause a processor of a medical device system to:
-
establish a plurality of population-based thresholds corresponding to a plurality of cardiac signal morphology metrics for discriminating between a first cardiac event and a second cardiac event; establish a first threshold criterion for discriminating cardiac events, the first threshold criterion comprising a comparison between a cardiac signal morphology metric and one established population-based threshold of the established plurality of population-based thresholds; sense a cardiac signal segment; apply the first threshold criterion to the sensed cardiac signal segment; classify the sensed cardiac signal segment only in response to the applying the first threshold criterion being satisfied; establish a patient-specific threshold in response to the sensed cardiac signal segment not being classified after applying the first threshold criterion; compute a metric of the sensed cardiac signal segment and comparing the metric to the established patient-specific threshold; and classify the sensed signal segment in response to the comparing of the metric to the established patient-specific threshold.
-
Specification