Automatic heart rate diagnostics
First Claim
1. A medical device system comprising:
- sensing circuitry configured to sense a cardiac electrogram signal of a patient via a plurality of electrodes and generate a signal that varies as a function of movement and posture of the patient; and
processing circuitry configured to, for each of a plurality of periods;
determine a plurality of heart rates of the patient based on the cardiac electrogram signal;
identify a first subset of the plurality of heart rates as nighttime heart rates, wherein each of the first subset of the plurality of heart rates occur when the patient is expected or determined to be asleep;
identify a second subset of the plurality of heart rates as resting heart rates, wherein each of the second subset of the plurality of heart rates occur when the patient is expected or determined to be awake and when at least one of the patient is lying down or an activity level of the patient satisfies a patient inactivity threshold;
determine a representative nighttime heart rate based on the first subset of the plurality of heart rates;
determine a representative resting heart rate based on the second subset of the plurality of heart rates;
determine a nocturnal dip based on the representative nighttime heart rate and the representative resting heart rate;
compare at least one of the representative nighttime heart rate, the representative resting heart rate, and the nocturnal dip to a respective threshold value; and
determine whether to generate an alert indicating a change in the cardiac function of the patient 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 periods, a plurality of heart rates of a patient based on a cardiac electrogram signal, and identifies a first subset of the plurality of heart rates as nighttime heart rates and a second subset of the plurality of heart rates as resting heart rates. The processing circuitry determines a representative nighttime heart rate based on the first subset of the plurality of heart rates, determines a representative resting heart rate based on the second subset of the plurality of heart rates, and determines a nocturnal dip base on the representative nighttime heart rate and the representative resting heart rate. The processing circuitry compares at least one of the representative nighttime heart rate, the representative resting heart rate, and the nocturnal dip in heart rate to a respective threshold value, and determines whether to generate an alert indicating a change in the cardiac function of the patient based on the comparison.
-
Citations
20 Claims
-
1. A medical device system comprising:
-
sensing circuitry configured to sense a cardiac electrogram signal of a patient via a plurality of electrodes and generate a signal that varies as a function of movement and posture of the patient; and processing circuitry configured to, for each of a plurality of periods; determine a plurality of heart rates of the patient based on the cardiac electrogram signal; identify a first subset of the plurality of heart rates as nighttime heart rates, wherein each of the first subset of the plurality of heart rates occur when the patient is expected or determined to be asleep; identify a second subset of the plurality of heart rates as resting heart rates, wherein each of the second subset of the plurality of heart rates occur when the patient is expected or determined to be awake and when at least one of the patient is lying down or an activity level of the patient satisfies a patient inactivity threshold; determine a representative nighttime heart rate based on the first subset of the plurality of heart rates; determine a representative resting heart rate based on the second subset of the plurality of heart rates; determine a nocturnal dip based on the representative nighttime heart rate and the representative resting heart rate; compare at least one of the representative nighttime heart rate, the representative resting heart rate, and the nocturnal dip to a respective threshold value; and determine whether to generate an alert indicating a change in the cardiac function of the patient based on the comparison. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. A method comprising:
-
generating, by sensing circuitry configured to sense a cardiac electrogram signal of a patient via a plurality of electrodes, a signal that varies as a function of movement and posture of the patient; and for each of a plurality of periods, by processing circuitry; determining a plurality of heart rates of the patient based on the cardiac electrogram signal; identifying a first subset of the plurality of heart rates as nighttime heart rates wherein each of the first subset of the plurality of heart rates occur when the patient is expected or determined to be asleep; identifying a second subset of the plurality of heart rates as resting heart rates, wherein each of the second subset of the plurality of heart rates occur when the patient is expected or determined to be awake and when at least one of the patient is lying down or an activity level of the patient satisfies a patient inactivity threshold; determining a representative nighttime heart rate based on the first subset of the plurality of heart rates; determining a representative resting heart rate based on the second subset of the plurality of heart rates; determining a nocturnal dip based on the representative nighttime heart rate and the representative resting heart rate; comparing at least one of the representative nighttime heart rate, the representative resting heart rate, and the nocturnal dip to a respective threshold value; and determining whether to generate an alert indicating a change in the cardiac function of the patient based on the comparison. - View Dependent Claims (19, 20)
-
Specification