Cardiac monitoring and diagnostic systems, methods, and devices

• US 9,801,562 B1
• Filed: 06/01/2015
• Issued: 10/31/2017
• Est. Priority Date: 06/02/2014
• Status: Expired due to Fees

• Current Assignee: University of Hawai'i
• Original Assignee: University of Hawai'i
• Inventors: Host-Madsen, Anders
• Primary Examiner(s): Layno, Carl H
• Assistant Examiner(s): Piateski, Erin M
• Application Number:
  US14/727,706
• Time in Patent Office: 883 Days
• Field of Search: 600515
• CPC Class Codes: A61B 5/02438 with portable devices, e.g. worn by the patient
• CPC Class Codes: A61B 5/0245 by using sensing means generating electric signals, i.e. ECG signals
• CPC Class Codes: A61B 5/316 Modalities, i.e. specific diagnostic methods
• CPC Class Codes: A61B 5/349 Detecting specific parameters of the electrocardiograph cycle
• CPC Class Codes: A61B 5/681 Wristwatch-type devices
• CPC Class Codes: A61B 5/7246 using correlation, e.g. template matching or determination of similarity
• CPC Class Codes: A61B 5/7267 involving training the classification device
• CPC Class Codes: A61B 5/7275 Determining trends in physiological measurement data; Predicting development of a medical condition based on physiological measurements, e.g. determining a risk factor
• CPC Class Codes: A61B 5/746 Alarms related to a physiological condition, e.g. details of setting alarm thresholds or avoiding false alarms alarms per se G08B
• CPC Class Codes: G16H 50/70 for mining of medical data, e.g. analysing previous cases of other patients

Abstract

The disclosure herein provides cardiac monitoring and diagnostic system, methods, and devices. A cardiac diagnostic system for detecting potential indicators of cardiac disease comprises: a cardiac monitoring device comprising at least one electrode configured to detect an analog electrical cardiac signal of a user; a cardiac signal filter configured to convert the analog electrical cardiac signal to digital electrocardiogram data; an atypical cardiac sequence detector configured to detect atypical cardiac patterns in the electrocardiogram data that are potentially indicative of cardiac disease; and a notification transmitter configured to generate an alert when a detected atypical cardiac pattern is determined to be indicative of cardiac disease.

Claims

1. A cardiac diagnostic system for detecting potential indicators of cardiac disease, the cardiac diagnostic system comprising:

a cardiac monitoring device comprising at least one electrode configured to detect an analog electrical cardiac signal of a user;

a cardiac signal filter configured to convert the analog electrical cardiac signal to digital electrocardiogram data; and

an atypical cardiac sequence detector configured to analyze the digital electrocardiogram data to detect atypical cardiac patterns that are potentially indicative of cardiac disease,

wherein detecting the atypical cardiac patterns comprises;

determining a first encoded length of a segment of the digital electrocardiogram data using a first encoder based on typical data;

determining a second encoded length of the segment of the digital electrocardiogram data using a second encoder without knowledge of typical data, so that the encoded data is decodable; and

comparing the first and second encoded lengths,

wherein the second encoded length being smaller than the first encoded length is indicative of an atypical cardiac pattern.

2. The cardiac diagnostic system of claim 1, further comprising:

an atypical cardiac sequence processor configured to analyze detected atypical cardiac patterns in conjunction with historical data to determine whether the detected cardiac patterns are indicative of cardiac disease.

3. The cardiac diagnostic system of claim 2, wherein the atypical cardiac sequence processor is further configured to generate an alert when a detected atypical cardiac pattern is determined to be indicative of cardiac disease.

4. The cardiac diagnostic system of claim 1, wherein the first encoder comprises a typical encoder and the second encoder comprises a universal encoder.

5. The cardiac diagnostic system of claim 1, wherein the first encoder comprises a universal encoder that has been trained and frozen.

6. The cardiac diagnostic system of claim 5, wherein the second encoder comprises the same universal encoder, but not having been frozen.

7. The cardiac diagnostic system of claim 1, wherein the atypical sequence detector is further configured to store a detected pattern in a known patterns database.

8. The cardiac diagnostic system of claim 1, wherein detecting the atypical cardiac patterns further comprises:

determining a difference in the first and second encoded lengths;

comparing the determined difference to a threshold value; and

flagging the segment as atypical when the determined difference is greater than the threshold value.

9. The cardiac diagnostic system of claim 1, further comprising one or more computer processors configured to operate the cardiac signal filter and atypical cardiac sequence detector.

10. A cardiac diagnostic system for detecting potential indicators of cardiac disease, the cardiac diagnostic system comprising:

an atypical cardiac sequence detector configured to analyze digital electrocardiogram data to detect atypical cardiac patterns that are potentially indicative of cardiac disease, the digital electrocardiogram data generated by a cardiac signal filter configured to convert analog electrical cardiac signals to digital data, the analog electrical cardiac signals detected by at least one electrode of a cardiac monitoring device,

wherein detecting the atypical cardiac patterns comprises;

determining a first encoded length of a segment of the digital electrocardiogram data using a first encoder based on typical data;

determining a second encoded length of the segment of the digital electrocardiogram data using a second encoder without knowledge of typical data, so that the encoded data is decodable; and

comparing the first and second encoded lengths,

wherein the second encoded length being smaller than the first encoded length is indicative of an atypical cardiac pattern.

11. The cardiac diagnostic system of claim 10, further comprising:

an atypical cardiac sequence processor configured to analyze detected atypical cardiac patterns in conjunction with historical data to determine whether the detected cardiac patterns are indicative of cardiac disease.

12. The cardiac diagnostic system of claim 11, wherein the atypical cardiac sequence processor is further configured to generate an alert when a detected atypical cardiac pattern is determined to be indicative of cardiac disease.

13. The cardiac diagnostic system of claim 10, wherein the first encoder comprises a typical encoder and the second encoder comprises a universal encoder.

14. The cardiac diagnostic system of claim 10, wherein the first encoder comprises a universal encoder that has been trained and frozen.

15. The cardiac diagnostic system of claim 14, wherein the second encoder comprises the same universal encoder, but not having been frozen.

16. The cardiac diagnostic system of claim 10, wherein the atypical sequence detector is further configured to store a detected pattern in a known patterns database.

17. The cardiac diagnostic system of claim 10, wherein detecting the atypical cardiac patterns further comprises:

determining a difference in the first and second encoded lengths;

comparing the determined difference to a threshold value; and

flagging the segment as atypical when the determined difference is greater than the threshold value.

18. The cardiac diagnostic system of claim 10, further comprising one or more computer processors configured to operate the atypical cardiac sequence detector.

19. A cardiac diagnostic method for detecting potential indicators of cardiac disease, the cardiac diagnostic method comprising:

receiving, by a computer system, digital electrocardiogram data representative of electrical cardiac activity, the digital electrocardiogram data generated by converting analog electrical cardiac signals to digital data, the analog electrical cardiac signals detected by at least one electrode of a cardiac monitoring device;

selecting, by the computer system, a segment of the digital electrocardiogram data to analyze for potential atypical cardiac patterns;

determining, by the computer system, a first encoded length of the segment of the digital electrocardiogram data using a first encoder based on typical data;

determining, by the computer system, a second encoded length of the segment of the digital electrocardiogram data using a second encoder without knowledge of typical data, so that the encoded data is decodable; and

comparing, by the computer system, the first and second encoded lengths,

wherein the second encoded length being smaller than the first encoded length is indicative of an atypical cardiac pattern, and

wherein the computer system comprises one or more computer processors and an electronic memory.

20. The cardiac diagnostic method of claim 19, wherein the first encoder comprises a typical encoder and the second encoder comprises a universal encoder.