Systems and methods for detecting worsening heart failure
First Claim
1. A system comprising:
- a signal processor circuit configured to;
receive a first physiological signal;
generate a first signal metric from the first physiological signal;
receive a second physiological signal different from the first physiologic signal; and
generate a second signal metric, different from the first signal metric, from the second physiological signal;
a detector circuit configured to;
receive a risk indication indicating a cardiac risk of the patient;
generate a primary detection indication of a presence or absence of a worsening cardiac event based on the first signal metric;
generate a secondary detection indication of a presence or absence of the worsening cardiac event, different from the primary detection indication, based on the second signal metric;
modulate the secondary detection indication by the risk indication; and
detect the worsening cardiac event as a combination of (1) the unmodulated primary detection indication and (2) the modulated secondary detection indication; and
an output circuit configured to generate an alert in response to the detection of the worsening cardiac event.
1 Assignment
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Accused Products
Abstract
Systems and methods for detecting worsening cardiac conditions such as worsening heart failure events are described. A system may include sensor circuits to sense physiological signals and signal processors to generate from the physiological signals first and second signal metrics. The system may include a risk stratifier circuit to produce a cardiac risk indication. The system may use at least the first signal metric to generate a primary detection indication, and use at least the second signal metric and the risk indication to generate a secondary detection indication. The risk indication may be used to modulate the second signal metric. A detector circuit may detect the worsening cardiac event using the primary and secondary detection indications.
54 Citations
20 Claims
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1. A system comprising:
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a signal processor circuit configured to; receive a first physiological signal; generate a first signal metric from the first physiological signal; receive a second physiological signal different from the first physiologic signal; and generate a second signal metric, different from the first signal metric, from the second physiological signal; a detector circuit configured to; receive a risk indication indicating a cardiac risk of the patient; generate a primary detection indication of a presence or absence of a worsening cardiac event based on the first signal metric; generate a secondary detection indication of a presence or absence of the worsening cardiac event, different from the primary detection indication, based on the second signal metric; modulate the secondary detection indication by the risk indication; and detect the worsening cardiac event as a combination of (1) the unmodulated primary detection indication and (2) the modulated secondary detection indication; and an output circuit configured to generate an alert in response to the detection of the worsening cardiac event. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method comprising:
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receiving, via a signal processor circuit, first and second physiological signals; generating, via the signal processor circuit, a first signal metric from the first physiological signal and a second signal metric from the second physiological signal; receiving, via a detector circuit, a risk indication indicating a cardiac risk of the patient; generating, via the detector circuit, a primary detection indication of a presence or absence of a worsening cardiac event based on the first signal metric, and a secondary detection indication of a presence or absence of the worsening cardiac event based on the second signal metric; modulating, via the detector circuit, the secondary detection indication by the risk indication; and detecting, via the detector circuit, the worsening cardiac event as a combination of (1) the unmodulated primary detection indication, and (2) the modulated secondary detection indication. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A system comprising:
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a signal processor circuit configured to; receive first physiological information; generate a first signal metric from the first physiological information; receive second physiological information different from the first physiologic information; and generate a second signal metric, different from the first signal metric, from the second physiological information; a detector circuit configured to; receive a risk indication indicating a cardiac risk of the patient; generate a first detection indication of a presence or absence of a worsening cardiac event based on the first signal metric; generate a second detection indication of a presence or absence of a worsening cardiac event, different from the first detection indication; and detect the worsening cardiac event as a combination of the first detection indication, irrespective of the risk indication, and a combination of the second signal metric and the risk indication; and an output circuit configured to generate an alert in response to the detection of the worsening cardiac event.
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Specification