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AI Biotech/Diagnostics: Other Innovation
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Application US20190069794
Published 2019-03-07
System And Method For Facilitating A Cardiac Rhythm Disorder Diagnosis Based On Subcutaneous Cardiac Monitoring Data
A system and method for facilitating a cardiac rhythm disorder diagnosis based on subcutaneous cardiac monitoring data with the aid of a digital computer are provided. Cutaneous action potentials of a patient are recorded as electrocardiogram (EGC) data over a set time period using a subcutaneous insertable cardiac monitor. A set of R-wave peaks is identified within the ECG data and an R-R interval plot is constructed. A difference between recording times of successive pairs of the R-wave peaks in the set is determined. A heart rate associated with each difference is also determined. The pairs of the R-wave peaks and associated heart rate are plotted as the R-R interval plot. A diagnosis of cardiac disorder is facilitated based on patterns of the plotted pairs of the R-wave peaks and the associated heart rates in the R-R interval plot.
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- 1. A system for facilitating a cardiac rhythm disorder diagnosis based on subcutaneous cardiac monitoring data, comprising:
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.
- 11. A method for facilitating a cardiac rhythm disorder diagnosis based on subcutaneous cardiac monitoring data, comprising:
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.
