Analysis method and apparatus for high-frequency QRS waveform curve, computer device and storage medium

A computer device for improving real-time assessment of collateral circulation during an exercise stress test using high-frequency QRS waveform analysis, the computer device comprising

• an ECG acquisition front-end,
• a display, a memory, and
• one or more processors, wherein the memory stores computer-readable instructions that, when executed by the one or more processors, cause the one or more processors to
• acquire, during the exercise stress test, multi-lead exercise electrocardiogram data via the ECG acquisition front-end;
• for each lead, generate a high-frequency QRS waveform curve by segmenting the data into sliding windows aligned to QRS complexes, band-pass filtering each window to isolate a high-frequency QRS component, averaging aligned complexes, and computing, for each window, an RMS voltage to form the high-frequency QRS waveform curve;
• select, for each lead, as a reference waveform curve, the high-frequency QRS waveform curve in a preset time period that begins at a starting point of an exercise phase and has a duration of three minutes;
• select, on the reference waveform curve, a first reference point at which an RMS voltage is smallest within the preset time period;
• select, from the reference waveform curve, (i) a second reference point that is a starting point of the preset time period and (ii) a third reference point that is a first inflection point occurring after the first reference point;
• determine an amplitude falling relative value based on respective RMS voltages of the first point and the second reference point and
• determine an amplitude rising relative value based on respective RMS voltages of the first and third reference points;
• responsive to both relative values satisfying respective preset thresholds, determine reference information including first reference information
• determined from at least one indicator selected from:
• an amplitude recovery degree indicator, an amplitude rising duration, and an area of a waveform falling region;
• and cause the display to present, during the exercise phase, a classification of an establishment degree of collateral circulation derived from the first reference information.

A non-transitory computer-readable storage media storing instructions for improving real-time assessment of collateral circulation during an exercise stress test using high-frequency QRS waveform analysis, the instructions when executed by one or more processors of a stress-test electrocardiograph system, cause the stress-test electrocardiograph system to perform a method comprising:

• acquiring, during the exercise stress test, multi-lead exercise electrocardiogram data, wherein the stress-test electrocardiogram includes an electrocardiogram (ECG) acquisition front-end coupled to electrodes and a display;
• for each lead, generating a high-frequency QRS waveform curve by segmenting the data into sliding windows aligned to QRS complexes, band-pass filtering each window to isolate a high-frequency QRS component, averaging aligned complexes, and computing, for each window, an RMS voltage to form the high-frequency QRS waveform curve;
• selecting, for each lead, as a reference waveform curve, the high-frequency QRS waveform curve in a preset time period that begins at a starting point of an exercise phase and has a duration of three minutes;
• selecting, on the reference waveform curve, a first reference point at which an RMS voltage is smallest within the preset time period;
• selecting, from the reference waveform curve, (i) a second reference point that is a starting point of the preset time period and (ii) a third reference point that is a first inflection point occurring after the first reference point;
• determining an amplitude falling relative value based on respective RMS voltages of the first and second reference
• points and determine an amplitude rising relative value based on respective RMS voltages of the first and third reference points;
• responsive to both relative values satisfying respective preset thresholds, determining first reference information
• from at least one indicator selected from:
• an amplitude recovery degree indicator, an amplitude rising duration, and an area of a waveform falling region;
• and
• causing the stress-test electrocardiograph system to present, on the display during the exercise phase, a classification of an establishment degree of collateral circulation derived from the first reference information.