Medical device operational modes

An ambulatory medical device configured to analyze heart rates in different operating modes, comprising:

• a plurality of ECG sensing electrodes for sensing ECG signals of a patient;
• a plurality of therapy electrodes configured to deliver a treatment to the patient in response to detecting a cardiac arrhythmia condition indicated by the ECG signals;
• an activity sensor configured to detect physical activity of the patient;
• and
• at least one processor in communication with the plurality of ECG sensing electrodes and the plurality of therapy electrodes, the at least one processor configured to
• operate in a default operating mode,
• in the default operating mode,
• calculate a heart rate of the patient using a default heart rate calculation that comprises an average of a number of heart beats, and
• detect the cardiac arrhythmia condition in the default operating mode based at least in part on the default heart rate calculation,
• change from operating in the default operating mode to operating in an activity operating mode, the change comprising at least one of
• an automatic change to the activity operating mode based on the detected physical activity of the patient, or
• a manual selection of the activity operating mode, and in the activity operating mode,
• calculate the heart rate of the patient using a different heart rate calculation from the default heart rate calculation, wherein the different heart rate calculation comprises a median of the number of heart beats, and
• detect the cardiac arrhythmia condition in the activity operating mode based at least in part on the different heart rate calculation,
• wherein the plurality of therapy electrodes is configured to deliver the treatment in response to detecting the cardiac arrhythmia condition.

An ambulatory medical device configured to analyze heart rates in different operating modes, comprising:

• a plurality of ECG sensing electrodes for sensing ECG signals of a patient;
• a plurality of therapy electrodes configured to deliver a treatment to the patient in response to detecting a cardiac arrhythmia condition indicated by the ECG signals;
• an activity sensor configured to detect physical activity of the patient;
• at least one processor in communication with the plurality of ECG sensing electrodes and the plurality of therapy electrodes, the at least one processor configured to
• operate in a default operating mode,
• in the default operating mode,
• calculate a heart rate of the patient using a default heart rate calculation, and
• detect the cardiac arrhythmia condition in the default operating mode based at least in part on the default heart rate calculation,
• change from operating in the default operating mode to operating in an activity operating mode, the change comprising at least one of
• an automatic change to the activity operating mode based on the detected physical activity of the patient, or
• a manual selection of the activity operating mode, and in the activity operating mode,
• calculate the heart rate of the patient using a different heart rate calculation from the default heart rate calculation, and
• detect the cardiac arrhythmia condition in the activity operating mode based at least in part on the different heart rate calculation;
• and
• a memory having stored therein a default operating mode heart rate threshold and an activity operating mode heart rate threshold, wherein the cardiac arrhythmia condition is detected based on the default operating mode heart rate threshold while the ambulatory medical device is in the default operating mode and the activity operating mode heart rate threshold while the ambulatory medical device is in the activity operating mode;
• wherein the activity operating mode heart rate threshold is greater than the default operating mode heart rate threshold by 5 to 10 beats per minute;
• and
• wherein the plurality of therapy electrodes is configured to deliver the treatment in response to detecting the cardiac arrhythmia condition.

An ambulatory medical device configured to analyze heart rates in different operating modes, comprising:

• a plurality of ECG sensing electrodes for sensing ECG signals of a patient;
• a plurality of therapy electrodes configured to deliver a treatment to the patient in response to detecting a cardiac arrhythmia condition indicated by the ECG signals;
• an activity sensor configured to detect physical activity of the patient;
• at least one processor in communication with the plurality of ECG sensing electrodes and the plurality of therapy electrodes, the at least one processor configured to
• operate in a default operating mode,
• in the default operating mode,
• calculate a heart rate of the patient using a default heart rate calculation, and
• detect the cardiac arrhythmia condition in the default operating mode based at least in part on the default heart rate calculation,
• change from operating in the default operating mode to operating in an activity operating mode, the change comprising at least one of
• an automatic change to the activity operating mode based on the detected physical activity of the patient, or
• a manual selection of the activity operating mode, and in the activity operating mode,
• calculate the heart rate of the patient using a different heart rate calculation from the default heart rate calculation, and
• detect the cardiac arrhythmia condition in the activity operating mode based at least in part on the different heart rate calculation;
• and
• a memory having stored therein a default operating mode heart rate threshold and an activity operating mode heart rate threshold, wherein the cardiac arrhythmia condition is detected based on the default operating mode heart rate threshold while the ambulatory medical device is in the default operating mode and the activity operating mode heart rate threshold while the ambulatory medical device is in the activity operating mode;
• wherein the activity operating mode heart rate threshold is 5% greater than the default operating mode heart rate threshold if the heart rate of the patient in the activity operating mode is at or around 20% greater than the heart rate of the patient in the default operating mode;
• and
• wherein the plurality of therapy electrodes is configured to deliver the treatment in response to detecting the cardiac arrhythmia condition.

An ambulatory medical device configured to analyze heart rates in different operating modes, comprising:

• a plurality of ECG sensing electrodes for sensing ECG signals of a patient;
• a plurality of therapy electrodes configured to deliver a treatment to the patient in response to detecting a cardiac arrhythmia condition indicated by the ECG signals;
• an activity sensor configured to detect physical activity of the patient;
• and
• at least one processor in communication with the plurality of ECG sensing electrodes and the plurality of therapy electrodes, the at least one processor configured to
• operate in a default operating mode,
• in the default operating mode,
• calculate a heart rate of the patient using a default heart rate calculation, and
• detect the cardiac arrhythmia condition in the default operating mode based at least in part on the default heart rate calculation,
• change from operating in the default operating mode to operating in an activity operating mode, the change comprising at least one of
• an automatic change to the activity operating mode based on the detected physical activity of the patient, or
• a manual selection of the activity operating mode, and in the activity operating mode,
• calculate the heart rate of the patient using a different heart rate calculation from the default heart rate calculation, and
• detect the cardiac arrhythmia condition in the activity operating mode based at least in part on the different heart rate calculation,
• wherein the plurality of therapy electrodes is configured to deliver the treatment in response to detecting the cardiac arrhythmia condition;
• and
• wherein the at least one processor is configured to increase an amount of time to detect the cardiac arrhythmia condition in the activity operating mode by 10% greater than a default amount of time to detect the cardiac arrhythmia condition in the default operating mode if the heart rate of the patient in the activity operating mode is at or around 20% greater than the heart rate of the patient in the default operating mode.