Patent US10143392

VCG vector loop bifurcation
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US10143392

1. An apparatus comprising a non-volatile computer readable medium storing instructions for causing a computing system to perform operations comprising: (12) (7)

receiving, from two or more ECG leads, an ECG signal of a patient;

generating at least two orthogonal ECG vectors based on the ECG signal;

processing the at least two orthogonal ECG vectors to determine a vectorcardiogram loop trajectory of at least a portion of the ECG signal;

identifying a trajectory bifurcation by comparing the vectorcardiogram loop trajectory to a control vectorcardiogram loop trajectory for at least three consecutive cardiac cycles of a plurality of cardiac cycles;

determining a variation of the trajectory bifurcation over time, the determination based on an analysis of the trajectory bifurcation of the at least three consecutive cardiac cycles;

determining an indicator of a cardiac event based on the variation of the trajectory bifurcation; and

delivering a treatment to the patient based on the determined indicator of the cardiac event.

2. The apparatus of claim 1, wherein the cardiac event comprises an impending acute degeneration of a patient's medical condition. (1) (0)

4. The apparatus of claim 1, wherein the apparatus is a defibrillator. (1) (0)

6. The apparatus of claim 1, wherein the two or more ECG leads are included within a wearable defibrillator worn by the patient, and the apparatus is configured to be in communication with the wearable defibrillator. (7) (0)

7. The apparatus of claim 6, wherein the vectorcardiogram loop trajectory is a test vectorcardiogram loop trajectory that comprises a first plurality vectorcardiogram loop trajectories obtained during a first time period and the control vectorcardiogram loop trajectory comprises a second plurality of vectorcardiogram loop trajectories obtained during a second time period that is prior to the first time period. (4) (0)

12. The apparatus of claim 6, wherein identifying the trajectory bifurcation further comprises measuring a degree of trajectory bifurcation between the vectorcardiogram loop trajectory and the control vectorcardiogram loop trajectory. (0)

13. The apparatus of claim 6, wherein identifying the trajectory bifurcation further comprises identifying landmarks in the vectorcardiogram loop trajectory and in the control vectorcardiogram loop trajectory. (0)

14. The apparatus of claim 6, wherein identifying the trajectory bifurcation further comprises determining a measure of a shape uncertainty of the vectorcardiogram loop trajectory and the control vectorcardiogram loop trajectory. (1) (0)

16. The apparatus of claim 6, wherein the cardiac event comprises an impending acute degeneration of a patient's medical condition. (1) (0)

18. The apparatus of claim 6, wherein the instructions further comprise providing an alert regarding the cardiac event. (0)

19. The apparatus of claim 6, wherein the instructions further comprise delivering the treatment to the patient based on the indicator of the cardiac event. (0)

20. The apparatus of claim 1, wherein the indicator is determined at different time periods. (1) (0)

23. The apparatus of claim 1, wherein the portion of the ECG signal comprises at least one of a T wave, a P wave and a S wave. (0)

24. The apparatus of claim 1, the operations comprising displaying the indicator of the cardiac event. (0)

25. The apparatus of claim 1, wherein the vectorcardiogram loop trajectory is a test vectorcardiogram loop trajectory that comprises a first plurality vectorcardiogram loop trajectories obtained during a first time period and the control vectorcardiogram loop trajectory comprises a second plurality of vectorcardiogram loop trajectories obtained during a second time period that is prior to the first time period. (3) (0)

29. The apparatus of claim 1, wherein identifying the trajectory bifurcation further comprises measuring a degree of the trajectory bifurcation between the vectorcardiogram loop trajectory and the control vectorcardiogram loop trajectory. (1) (0)

32. The apparatus of claim 1, wherein identifying the trajectory bifurcation further comprises identifying landmarks in the vectorcardiogram loop trajectory and in the control vectorcardiogram loop trajectory. (0)

33. The apparatus of claim 1, wherein identifying the trajectory bifurcation further comprises determining a measure of a shape uncertainty of the vectorcardiogram loop trajectory and the control vectorcardiogram loop trajectory. (1) (0)

35. The apparatus of claim 1, wherein the computing system comprises a mobile computing device. (0)

36. The apparatus of claim 1, wherein the control vectorcardiogram loop trajectory is generated based on a plurality of predetermined vectorcardiogram loop trajectories derived from one or more of a P, T, and QRS segments of the ECG signal of the patient during a first period of time. (0)

37. A computer-implemented method executed by one or more processors, the method comprising: (4) (7)

receiving, from two or more ECG leads, an ECG signal of a patient;

generating at least two orthogonal ECG vectors based on the ECG signal;

processing the at least two orthogonal ECG vectors to determine a vectorcardiogram loop trajectory of at least a portion of the ECG signal;

determining a variation of the trajectory bifurcation over time, the determination based on an analysis of the trajectory bifurcation of the at least three consecutive cardiac cycles;

determining an indicator of a cardiac event based on the variation of the trajectory bifurcation; and

delivering a treatment to the patient based on the determined indicator of the cardiac event.

38. The computer-implemented method of claim 37, wherein processing the at least two orthogonal ECG vectors to determine the vectorcardiogram loop trajectory comprises: (0) (3)

39. The computer-implemented method of claim 37, wherein identifying the trajectory bifurcation comprises: (1) (2)

calculating an area of the vectorcardiogram loop trajectory; and

subtracting the area of the vectorcardiogram loop trajectory from an area of the control vectorcardiogram loop trajectory.

40. The computer-implemented method of claim 39, wherein identifying the trajectory bifurcation further comprises: (0) (3)

41. The computer-implemented method of claim 37, further comprising displaying the indicator of the cardiac event. (0)

42. The computer-implemented method of claim 37, wherein the two or more ECG leads are included within a wearable defibrillator worn by the patient. (0)

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Patent US10143392

VCG vector loop bifurcation

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