Application US20190069794

SYSTEM AND METHOD FOR FACILITATING A CARDIAC RHYTHM DISORDER DIAGNOSIS BASED ON SUBCUTANEOUS CARDIAC MONITORING DATA
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US20190069794

1. A system for facilitating a cardiac rhythm disorder diagnosis based on subcutaneous cardiac monitoring data, comprising: (6) (2)

a subcutaneous insertable cardiac monitor, comprising: an implantable housing comprised of a biocompatible material that is suitable for implantation within a living body;

at least one pair of electrocardiographic (ECG) sensing electrodes provided on a ventral surface and on opposite ends of the implantable housing operatively placed to facilitate sensing in closest proximity to the low amplitude, low frequency content cardiac action potentials that are generated during atrial activation; and

electronic circuitry provided within the housing assembly comprising a low power microcontroller operable to execute under modular micro program control as specified in firmware, an ECG front end circuit interfaced to the microcontroller and configured to capture the cardiac action potentials sensed by the pair of ECG sensing electrodes which are output as ECG signals, and non-volatile memory electrically interfaced with the microcontroller and operable to continuously store samples of the ECG signals; and

a download station adapted to retrieve the stored samples of the ECG signals from the subcutaneous insertable cardiac monitor as ECG data; a processor and memory within which code for execution by the processor is stored, further comprising: an identification module to identify a set of R-wave peaks within the ECG data;

a construction module to construct an R-R interval plot, comprising: a determination submodule to determine a difference between recording times of successive pairs of the R-wave peaks in the set and to determine a heart rate associated with each difference; and

a plot submodule to plot the pairs of the R-wave peaks and associated heart rate as the R-R interval plot;

a display to facilitate diagnosis of a cardiac disorder of the patient based on patterns of the plotted pairs of the R-wave peaks and the associated heart rates in the R-R interval plot.

2. A system in accordance with claim 1, the processor further comprising: (1) (1)

4. A system in accordance with claim 1, wherein the processor is configured to form: (0) (2)

5. A system in accordance with claim 1, wherein the display displays the R-R interval plot with one or more views of at least a portion of the ECG data as contextual data for the R-R interval plot. (0)

6. A system in accordance with claim 1, wherein each ECG data view comprises one of a near field view providing ECG data corresponding to the data for the R-wave peak pairs at a center of the R-R interval plot and an intermediate field view providing presentation of additional ECG data than the near field view. (0)

7. A system in accordance with claim 1, wherein the set of R-wave peaks is collected over a period of at least 40 minutes. (0)

8. A system in accordance with claim 1, further comprising: (1) (1)

a selection module to select the set of R-wave peaks by identifying a potential cardiac event within the ECG data and obtaining a portion of the ECG data corresponding to a time during, prior to, and after the potential cardiac event as the set of R-wave peaks.

9. A system in accordance with claim 8, further comprising: (1) (1)

11. A method for facilitating a cardiac rhythm disorder diagnosis based on subcutaneous cardiac monitoring data, comprising: (6) (5)

recording cardiac action potentials of a patient over a set time period using a subcutaneous insertable cardiac monitor, comprising an implantable housing comprised of a biocompatible material that is suitable for implantation within a living body; at least one pair of electrocardiographic (ECG) sensing electrodes provided on a ventral surface and on opposite ends of the implantable housing operatively placed to facilitate sensing in closest proximity to the low amplitude, low frequency content cardiac action potentials that are generated during atrial activation; and electronic circuitry provided within the housing assembly comprising a low power microcontroller operable to execute under modular micro program control as specified in firmware, an ECG front end circuit interfaced to the microcontroller and configured to capture the cardiac action potentials sensed by the pair of ECG sensing electrodes which are output as ECG signals, and non-volatile memory electrically interfaced with the microcontroller and operable to continuously store samples of the ECG signals; and

retrieving the stored samples of the ECG signals as ECG data;

identifying a set of R-wave peaks within the ECG data;

constructing an R-R interval plot, comprising: determining a difference between recording times of successive pairs of the R-wave peaks in the set;

determining a heart rate associated with each difference; and

plotting the pairs of the R-wave peaks and associated heart rate as the R-R interval plot;

facilitating diagnosis of a cardiac disorder of the patient based on patterns of the plotted pairs of the R-wave peaks and the associated heart rates in the R-R interval plot.

12. A method in accordance with claim 11, further comprising: (1) (1)

14. A method in accordance with claim 11, further comprising at least one of: (0) (2)

15. A method in accordance with claim 11, further comprising: (0) (1)

16. A method in accordance with claim 11, wherein each ECG data view comprises one of a near field view providing ECG data corresponding to the data for the R-wave peak pairs at a center of the R-R interval plot and an intermediate field view providing presentation of additional ECG data than the near field view. (0)

17. A method in accordance with claim 11, wherein the set of R-wave peaks is collected over a period of at least 40 minutes. (0)

18. A method in accordance with claim 11, further comprising: (1) (1)

selecting the set of R-wave peaks, comprising: identifying a potential cardiac event within the ECG data; and

obtaining a portion of the ECG data corresponding to a time during, prior to, and after the potential cardiac event as the set of R-wave peaks.

19. A method in accordance with claim 18, further comprising: (1) (1)

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Application US20190069794

SYSTEM AND METHOD FOR FACILITATING A CARDIAC RHYTHM DISORDER DIAGNOSIS BASED ON SUBCUTANEOUS CARDIAC MONITORING DATA

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