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US 2026/0256405 A1Published application
Systems and methods for detecting atrial tachyarrhythmia
AssigneeCardiac Pacemakers, Inc.
InventorsDeepa MAHAJAN, David L. PERSCHBACHER, Sunipa SAHA, Abhijit RAJAN
Life of this patent
Estimating the term…
Abstract
Systems and methods for detecting cardiac arrhythmia are discussed. A medical-device system includes an arrhythmia detector circuit and an event prioritizer circuit. The arrhythmia detector circuit can detect an atrial activation event from a cardiac electrical signal sensed from the patient, and determine an atrial fibrillation (AF) confidence indicator based on a signal characteristic of the atrial activation event. The event prioritizer circuit can generate an event priority for the AF event based on the AF confidence indicator. Multiple AF events may be prioritized in a specific order and presented to a user or a process.
Claims20
A system for detecting cardiac arrhythmia in a patient, the system comprising:
- an atrial fibrillation (AF) detector circuit configured to determine a ventricular rate parameter for the patient using a cardiac electrical signal of the patient and to detect an AF event using the determined ventricular rate parameter;
- an atrial characteristic generator circuit configured to determine an ensemble average of multiple segments of the cardiac electrical signal corresponding to a plurality of cardiac cycles, and to extract a dominant frequency of the ensemble average within an atrial detection window preceding a detected ventricular activation event within a cardiac cycle;
- an AF confidence calculator circuit configured to determine an AF confidence indicator indicating a confidence level of the detected AF event as a function of the dominant frequency of the ensemble average;
- an event prioritizer circuit configured to receive the detected AF event in a time-based order corresponding to a time of the detected AF event and to generate an event priority for the detected AF event based on the AF confidence indicator, the event priority different than the time-based order;
- and
- a controller circuit configured to dynamically control allocation of resources of a medical device to process or store information about the AF event in accordance with the generated event priority, including increasing allocation of resources in response to the generated event priority indicating a high confidence or a numerical confidence score above a threshold in contrast to the generated event priority indicating a low confidence or the numerical confidence score below the threshold,
- wherein detecting the AF event comprises using information of the cardiac electrical signal separate from the dominant frequency analysis performed by the atrial characteristic generator circuit.
4 more elements
A system for detecting cardiac arrhythmia in a patient, the system comprising:
- a noise detector circuit configured to detect a noise level of a cardiac electrical signal of the patient within a noise window of the cardiac electrical signal;
- an adaptive filter circuit configured to filter the cardiac electrical signal using the detected noise level to generate a filtered cardiac electrical signal;
- an atrial fibrillation (AF) detector circuit configured to determine a ventricular rate parameter for the patient using the filtered cardiac electrical signal and to detect an AF event using the determined ventricular rate parameter;
- an atrial characteristic generator circuit configured to determine an ensemble average of multiple segments of the filtered cardiac electrical signal corresponding to a plurality of cardiac cycles, and to generate a signal characteristic of a P wave for the plurality of cardiac cycles using the determined ensemble average of the filtered cardiac electrical signal;
- an AF confidence calculator circuit configured to determine an AF confidence indicator indicating a confidence level of the detected AF event based on the signal characteristic of the P wave generated from the ensemble average of the filtered cardiac electrical signal;
- an event prioritizer circuit configured to receive the detected AF event in a time-based order corresponding to a time of the detected AF event and to generate an event priority for the detected AF event based on the AF confidence indicator, the event priority different than the time-based order;
- and
- a controller circuit configured to dynamically control allocation of resources of a medical device to process or store information about the AF event in accordance with the generated event priority, including increasing allocation of resources in response to the generated event priority indicating a high confidence or a numerical confidence score above a threshold in contrast to the generated event priority indicating a low confidence or the numerical confidence score below the threshold,
- wherein detecting the AF event comprises using information of the filtered cardiac electrical signal separate from the detected absence or presence of the P wave.
6 more elements
A method for detecting cardiac arrhythmia in a patient, comprising:
- determining a ventricular rate parameter for the patient using a cardiac electrical signal of the patient;
- detecting an atrial fibrillation (AF) event using the determined ventricular rate parameter;
- determining an ensemble average of multiple segments of the cardiac electrical signal corresponding to a plurality of cardiac cycles;
- extracting, from the ensemble average, a dominant frequency within an atrial detection window preceding a detected ventricular activation event within a cardiac cycle;
- determining an AF confidence indicator indicating a confidence level of the detected AF event as a function of the dominant frequency of the ensemble average;
- receiving the detected AF event in a time-based order corresponding to a time of the detected AF event;
- generating an event priority for the detected AF event based on the AF confidence indicator, the event priority different than the time-based order;
- and
- dynamically allocating resources of a medical device to process or store information about the AF event in accordance with the generated event priority, including increasing allocation of resources in response to the generated event priority indicating a high confidence or a numerical confidence score above a threshold in contrast to the generated event priority indicating a low confidence or the numerical confidence score below the threshold,
- wherein detecting the AF event comprises using information of the cardiac electrical signal separate from the dominant frequency analysis.
7 more elements
Dependencies are inferred from the claim text.