A method for analyzing electrocardiogram based on three-dimensional electrocardiogram

Abstract

The present application provides an electrocardiogram analysis method based on a three-dimensional electrocardiogram superposition diagram, which can realize the rapid location of abnormal P wave and T wave sample data in the whole heartbeat for a large amount of dynamic electrocardiogram data, and the method is simple and easy to grasp. It constructs a three-dimensional electrocardiogram superposition diagram, and establishes a graphical correspondence between the waveform superposition diagram, the chromatogram, the characteristic parameter scatter diagram and the sample diagram through the three-dimensional electrocardiogram superposition diagram; the QRS wave with drastic amplitude changes is quickly found through the electrocardiogram superposition diagram, and the P wave or / and T wave with obvious changes is quickly found through the chromatogram, and the data suspected of abnormality is located; the characteristic parameter scatter diagram based on the characteristic parameter and time representation is designed to make up for the difficulty of observation caused by the voltage amplitude of the central electric wave of the chromatogram being converted into the depth of color, and the heartbeat characteristic parameter value of each heartbeat data is confirmed through the characteristic parameter scatter diagram, and each suspected data is confirmed in combination with the sample diagram, and finally the abnormal data is located.

Description

Technical Field

[0001] The invention relates to the technical field of electrocardiograms, and in particular to an electrocardiogram analysis method based on a three-dimensional electrocardiogram superposition diagram. Background Art

[0002] Holter is a method that can continuously record the ECG changes of the human heart in active and quiet states for a long time. In practical applications, the Holter usually monitors and records a large amount of ECG data of the human body for 1 day to 30 days or longer. When analyzing the Holter, in order to achieve a rapid review of the full heartbeat of the Holter data and batch processing of erroneous heartbeats, most of the Holter analysis systems in the prior art are committed to developing information stacking technology to present the waveforms of a large number of heartbeats in one graph. Commonly used methods include: waveform overlay graph and chromatogram.

[0003] The waveform overlay is formed by repeatedly drawing curves by intercepting the ECG waves of fixed lengths with the QRS wave position of each heartbeat as the center. The waveform overlay can clearly observe the main QRS wave morphology of the entire recorded ECG, but it ignores the trend information of the waveform changing over time, so it cannot process waveforms such as P waves / T waves that are relatively short or rely on relative changes for image judgment, and it cannot quickly locate the position of abnormal waves in P waves / T waves.

[0004] The chromatogram intercepts the ECG wave of a fixed length in chronological order with the QRS wave position of each heartbeat as the center, represents the ECG wave as a one-dimensional vector of voltage amplitude and puts it into the two-dimensional data matrix column, and finally the two-dimensional data matrix column is color-coded and displayed. Although the heartbeat waveform in the chromatogram is arranged in time and the change of the waveform over time can be observed, the voltage amplitude of the ECG wave is converted into the depth of color, and it is difficult for analysts to infer the trend information of the waveform change over time by observing the color gradient with the human eye. Therefore, in the prior art, the chromatogram is only used in the screening of relatively obvious atrial fibrillation waves and atrial flutter waves. Summary of the invention

[0005] In order to solve the problem that the prior art lacks a method that can quickly search and locate abnormal P waves and T waves in the whole heartbeat for massive dynamic electrocardiogram data, the present application provides an electrocardiogram analysis method based on a three-dimensional electrocardiogram superposition diagram, which can quickly locate sample data of abnormal P waves and T waves in the whole heartbeat for massive dynamic electrocardiogram data. At the same time, the method is simple and easy to master.

[0006] The technical solution of the present invention is as follows: an electrocardiogram analysis method based on a three-dimensional electrocardiogram superposition diagram, characterized in that it comprises the following steps:

[0007] S1; Obtaining ECG sample data to be analyzed;

[0008] S2: Build a graphical analysis tool;

[0009] The graphical analysis tools include: three-dimensional electrocardiogram overlay diagram, waveform overlay diagram, chromatogram, characteristic parameter scatter diagram and sample diagram;

[0010] The three-dimensional electrocardiogram superposition diagram is: based on the electrocardiogram sample data to be analyzed, the sampling point sequence number, sample number, and voltage value are used as the coordinates of the X-axis, Y-axis, and Z-axis, and the three-dimensional electrocardiogram curve of each heartbeat data is drawn, and the electrocardiogram waves of all heartbeats are drawn in one image, so as to obtain the three-dimensional electrocardiogram superposition diagram;

[0011] The waveform superposition diagram is: the electrocardiogram of a fixed length is intercepted with the QRS wave position of each heart beat as the center and the curve is repeatedly drawn;

[0012] The chromatogram: intercepts a fixed length of electrocardiographic wave with the QRS wave position of each heart beat as the center in time sequence, represents the electrocardiographic wave as a one-dimensional vector of voltage amplitude and puts it into a two-dimensional data matrix column, and finally the two-dimensional data matrix column is displayed by color coding;

[0013] The characteristic parameter scatter plot: each scatter point represents a heartbeat, the horizontal axis is the heartbeat number, and the vertical axis is the heartbeat characteristic parameter value; the heartbeat characteristic parameter value includes: the statistical voltage average value, the maximum and minimum voltage difference, the maximum voltage and the minimum voltage of each heartbeat in the specified focus time period;

[0014] The sample graph: for each heartbeat sample, displays the heartbeat electrocardiogram waveform with the R wave as the center;

[0015] S4: establishing a graphical correspondence between the waveform overlay graph, the chromatogram, the characteristic parameter scatter plot and the sample graph through the three-dimensional electrocardiogram overlay graph;

[0016] The horizontal coordinate and the vertical coordinate of the waveform superposition diagram correspond to the X-axis coordinate and the Z-axis coordinate of the three-dimensional electrocardiogram superposition diagram;

[0017] The horizontal coordinate and the vertical coordinate of the chromatogram correspond to the Y-axis coordinate and the X-axis coordinate of the three-dimensional electrocardiogram superposition diagram;

[0018] The horizontal coordinate of the characteristic parameter scatter plot corresponds to the Y-axis coordinate of the three-dimensional electrocardiogram superposition graph;

[0019] The sample graph supports displaying a graph of each heartbeat data in the three-dimensional electrocardiogram superposition graph;

[0020] S5: Based on the graphic correspondence between the visualization tools, construct the data linkage logic between the visualization analysis tools, and perform data linkage on the heart rate data operations between all the visualization analysis tools;

[0021] S6: Based on the waveform overlay graph, find abnormal data with drastic amplitude changes, select the data, and display the selected data in the chromatogram;

[0022] In the chromatogram, data with obvious changes based on color are found and recorded as: suspect data;

[0023] Determine a focus time period in which the suspicious data is located, and select the focus time period;

[0024] S7: marking the suspected data area of ​​the focus time period on the three-dimensional electrocardiogram overlay diagram and the chromatogram; and only displaying the suspected data of the focus time period in the characteristic parameter scatter diagram and the sample diagram;

[0025] S8: confirming the heartbeat characteristic parameter value corresponding to the suspected data based on the characteristic parameter scatter plot;

[0026] Combine the specific waveform of each heartbeat data in the sample graph to locate abnormal data;

[0027] S9: Based on the sample graph, use the waveform graph of each abnormal data to perform subsequent batch operations on the abnormal data to complete the review and analysis of the abnormal data.

[0028] It is further characterized by:

[0029] All of the above-mentioned visualization tools are provided in one interface;

[0030] The three-dimensional electrocardiogram overlay image supports viewing angle switching, and realizes the change of the three-dimensional image display angle based on the X-axis, Y-axis and Z-axis;

[0031] The data linkage logic of the waveform overlay diagram includes:

[0032] Linkage refresh: When performing template stripping in a specified template, the 3D ECG overlay, chromatogram, characteristic parameter time scatter plot, and sample graph are redrawn at the same time;

[0033] Select the data area of ​​the waveform overlay graph, calculate the heartbeat samples in the selected area, record them as samples to be redrawn, and input the samples to be redrawn into its image analysis tool for synchronous response;

[0034] Specify the focus time period; after setting the focus time period in the waveform overlay diagram, calculate the heartbeat characteristic parameter values ​​of all heartbeats and electrocardiograms included in the focus time period in the time period, and redraw the characteristic parameter time scatter diagram based on the heartbeat characteristic parameter values; at the same time, other graphical analysis tools respond to the data of the focus time period;

[0035] The data linkage logic of the characteristic parameter scatter plot includes: selecting any scatter point, highlighting it in the interfaces of other three-dimensional ECG overlay graphs, chromatograms, and waveform overlay graphs, and displaying the selected sample graph in the sample graph interface;

[0036] The data linkage logic of the sample graph includes: selecting any sample and changing the attributes, and the selected sample is highlighted in the interface of other graphical analysis tools.

[0037] The present application provides an electrocardiogram analysis method based on a three-dimensional electrocardiogram overlay diagram, which constructs a three-dimensional electrocardiogram overlay diagram. The electrocardiogram overlay diagram and the chromatogram are projections of the three-dimensional electrocardiogram overlay diagram in two lateral directions, respectively. A graphical correspondence is established between the waveform overlay diagram, the chromatogram, the characteristic parameter scatter diagram and the sample diagram through the three-dimensional electrocardiogram overlay diagram, so as to ensure that the entire process is implemented based on a graphical interface, which is easy to understand and reduces the probability of errors in the results due to misunderstandings; the QRS wave with drastic amplitude changes can be quickly found through the electrocardiogram overlay diagram, and the P wave or / and T wave with obvious changes can be quickly found through the chromatogram, so that data suspected of abnormality can be located very quickly; the design is based on the feature The characteristic parameter scatter plot represented by parameter and time makes up for the observation difficulty caused by the voltage amplitude of the central radio wave of the chromatogram being converted into the depth of color. The heartbeat characteristic parameter value of each heartbeat data is confirmed through the characteristic parameter scatter plot, and each suspected data is confirmed in combination with the sample chart, and finally the abnormal data is located, ensuring that the analyst can quickly and accurately locate the abnormal data. In this method, data linkage logic is established between all graphical analysis tools to achieve the unification of observation and editing, so as to avoid the problem that some modules are only suitable for observation and some modules are only suitable for editing, further improving the analysis efficiency, especially suitable for batch analysis and processing of massive data. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A flowchart of an electrocardiogram analysis method based on a three-dimensional electrocardiogram superposition diagram;

[0039] Figure 2 An embodiment of a three-dimensional electrocardiogram superposition diagram;

[0040] Figure 3 An embodiment of an analysis interface for a graphical analysis tool;

[0041] Figure 4 is an embodiment of a waveform overlay diagram;

[0042] Figure 5 is an example of a chromatogram;

[0043] Figure 6 is an embodiment of a characteristic parameter scatter plot;

[0044] Figure 7This is an example of a single sample graph. DETAILED DESCRIPTION

[0045] like Figure 1 As shown, the present application includes an electrocardiogram analysis method based on a three-dimensional electrocardiogram overlay diagram, which includes the following steps.

[0046] S1: Obtain the electrocardiogram sample data to be analyzed.

[0047] S2: Build a graphical analysis tool;

[0048] like Figure 3 As shown, the graphical analysis tools include: three-dimensional ECG wave overlay diagram, waveform overlay diagram, chromatogram, characteristic parameter scatter diagram and sample diagram.

[0049] like Figure 2 As shown, the three-dimensional ECG wave superposition diagram is: based on the ECG sample data to be analyzed, the sampling point sequence number, sample number, and voltage value are used as the coordinates of the X-axis, Y-axis, and Z-axis to draw a three-dimensional ECG wave curve for each heartbeat data, and the ECG waves of all heartbeats are drawn in one image, so as to obtain a three-dimensional ECG wave superposition diagram, as shown in FIG. Figure 2 shown.

[0050] The three-dimensional ECG wave overlay image supports viewing angle switching, and realizes the change of the three-dimensional image display angle based on the X-axis, Y-axis and Z-axis; in this embodiment, the viewing angle can be changed to the left or right or up or down by clicking a button, and the viewing angle status is displayed in numbers on the left.

[0051] like Figure 4 As shown, the waveform overlay diagram: the ECG wave of a fixed length is intercepted with the QRS wave position of each heartbeat as the center and the curve is repeatedly drawn. In specific implementation, the waveform overlay diagram is drawn based on the technology of the waveform overlay diagram in the prior art. The waveform overlay diagram has multiple templates, and a certain number of samples can be classified into a specified template through template stripping. Figure 4 In the illustrated embodiment, template 0 is a waveform overlay diagram, and templates 1 to 4 contain the data stripped out by the analyst.

[0052] like Figure 5 As shown in the figure, the chromatogram: intercepts the ECG wave of fixed length in time sequence with the QRS wave position of each heart beat as the center, represents the ECG wave as a one-dimensional vector of voltage amplitude and puts it into the two-dimensional data matrix column, and finally the two-dimensional data matrix column is color-coded and displayed. In the specific implementation, the time period can be selected in the chromatogram to define the event type to which the time period belongs.

[0053] like Figure 6As shown, the characteristic parameter scatter plot: each scatter point represents a heartbeat, the horizontal axis is the heartbeat number, and the vertical axis is the heartbeat characteristic parameter value; the heartbeat characteristic parameter value includes: the statistical voltage average value, the maximum and minimum voltage difference, the maximum voltage and the minimum voltage of each heartbeat in the specified focus time period. In this embodiment, the upper left corner switches the current statistical characteristic parameter by means of a drop-down menu or a switch button.

[0054] like Figure 7 As shown in the sample diagram: for each heart beat sample, the heart beat ECG waveform is displayed with the R wave as the center.

[0055] In specific implementation, all graphical tools are set in one interface to ensure that analysts can more easily grasp the relationship between data from different tools and further improve analysis efficiency.

[0056] S4: establishing a graphical correspondence between the waveform overlay graph, the chromatogram, the characteristic parameter scatter plot and the sample graph through the three-dimensional electrocardiogram overlay graph;

[0057] The horizontal coordinate and the vertical coordinate of the waveform superposition diagram correspond to the X-axis coordinate and the Z-axis coordinate of the three-dimensional electrocardiogram superposition diagram;

[0058] The horizontal and vertical coordinates of the chromatogram correspond to the Y-axis coordinate and X-axis coordinate of the three-dimensional electrocardiogram superposition diagram;

[0059] The horizontal coordinate of the characteristic parameter scatter plot corresponds to the Y-axis coordinate of the three-dimensional electrocardiogram superposition diagram;

[0060] The sample graph supports displaying graphs of each heartbeat data in a 3D ECG overlay.

[0061] In this method, the traditional waveform overlay diagram and the chromatogram are linked by a three-dimensional ECG overlay diagram to achieve a more comprehensive observation of the heartbeat waveform. The ECG overlay diagram and the chromatogram are projections of the three-dimensional ECG overlay diagram in two lateral directions, respectively. The ECG overlay diagram is suitable for observing QRS waves with drastic amplitude changes, and the chromatogram is suitable for observing P waves / T waves with obvious changes. By linking the traditional waveform overlay diagram and the chromatogram by a three-dimensional ECG overlay diagram, not only can analysts easily grasp the data relationship between graphical analysis tools, but also can perform data analysis more efficiently. By designing a characteristic parameter time scatter plot to make up for the difficulty in observation caused by the voltage amplitude of the central electric wave of the chromatogram being converted into the depth of color, not only the advantages of the characteristic parameter time scatter plot are used, but also the shortcomings of the characteristic parameter time scatter plot are made up.

[0062] S5: Based on the graphic correspondence between the graphical tools, the data linkage logic between the graphical analysis tools is constructed, and the operations of the heart rate data among all the graphical analysis tools are linked;

[0063] The data linkage logic of the waveform overlay graph includes:

[0064] Linked refresh: When performing template stripping in the specified template, the 3D ECG overlay diagram, chromatogram, characteristic parameter time scatter diagram, and sample diagram are redrawn at the same time.

[0065] In this embodiment, when template stripping is performed in template No. 0, the three-dimensional ECG overlay diagram, chromatogram, characteristic parameter time scatter diagram, and sample diagram will be redrawn. For example: select the sample heart beats in the stripping area to template No. 1 by using the mouse, and then type the number 1 on the keyboard to execute "strip the sample heart beats in the area to template No. 1", and the selected data will be stripped to template No. 1. At this time, the heart beats included in template No. 0 have changed, and the three-dimensional ECG overlay diagram, chromatogram, characteristic parameter time scatter diagram, and sample diagram are redrawn according to the remaining heart beats in template No. 0. The linkage refresh function is mainly used to clean up the artifact samples in template 0 to ensure the consistency of the QRS wave morphology of the central electric wave in template 0, and to further analyze the small fluctuation areas such as P waves or T waves.

[0066] The data area of ​​the waveform overlay is selected, and the heartbeat samples in the selected area are calculated and recorded as samples to be redrawn. The samples to be redrawn are input into the graphical analysis tool for synchronous response. The specific corresponding method can be designed and implemented according to actual needs. In this embodiment, the three-dimensional ECG overlay will highlight the selected samples, the following triangle will indicate the position in the chromatogram bar chart, the characteristic parameter time scatter plot will highlight the corresponding sample scatter points, and the sample chart will list all selected samples in the form of a bar chart.

[0067] Specify a focus time period; after setting the focus time period in the waveform overlay diagram, calculate the heartbeat characteristic parameter values ​​of all heartbeats and electrocardiograms included in the focus time period, and redraw the characteristic parameter time scatter plot based on the heartbeat characteristic parameter values; at the same time, other graphical analysis tools respond to the focus time period.

[0068] In this embodiment, in the waveform overlay diagram, use the mouse to select the time period of interest, and this time period is designated as the focus time period. The characteristic parameters of all heart beats and ECG waves contained in template No. 0 in this time period (average voltage, maximum and minimum voltage difference, maximum voltage, minimum voltage, maximum voltage drop of positive peaks, and maximum voltage drop of negative peaks) will be calculated, and these values ​​will be input into the characteristic parameter time scatter plot module, where one scatter point represents a heart beat, the horizontal axis is the beat number, and the vertical axis is the characteristic parameter value. At the same time, the sample diagram lists all the selected samples in the focus time period in the form of a bar graph; the chromatogram and the three-dimensional ECG overlay diagram indicate the data of the time area of ​​the corresponding focus time period with horizontal lines. Specifically, Figure 3 As shown, in Figure 3 The mid-focus time period is labeled as the focus period.

[0069] The data linkage logic of the characteristic parameter scatter plot includes: selecting any scatter point, highlighting it in the interfaces of other 3D ECG overlay graphs, chromatograms, and waveform overlay graphs, and displaying the selected sample graph in the sample graph interface.

[0070] The data linkage logic of the sample graph includes: select any sample and change its attributes, and the selected sample will be highlighted in the interface of other graphical analysis tools. Based on the sample graph, batch modification of the selected samples can be achieved.

[0071] S6: Based on the waveform overlay graph, find the abnormal data with drastic amplitude changes, select it, and display the selected data in the chromatogram;

[0072] In the chromatogram, find data with obvious changes based on color, which are recorded as: suspect data;

[0073] Determine the focus time period where the suspect data is located and select the focus time period.

[0074] S7: Mark the suspected data area in the focus time period on the three-dimensional electrocardiogram overlay diagram and the chromatogram; and only display the suspected data in the focus time period in the characteristic parameter scatter diagram and the sample diagram.

[0075] S8: based on the characteristic parameter scatter plot, confirm the heartbeat characteristic parameter value corresponding to the suspected data;

[0076] Combined with the specific waveform of each heartbeat data in the sample graph, the abnormal data is located.

[0077] S9: Based on the sample graph, use the waveform graph of each abnormal data to perform subsequent batch operations on the abnormal data and complete the review and analysis of the abnormal data.

[0078] For example, in the ECG sample data to be analyzed, there is data of inverted P waves. Regarding the ECG with inverted P waves, since the P waves are relatively short and affected by baseline fluctuations, it is difficult to screen them by template stripping in the waveform overlay diagram, and it is necessary to identify them by analyzing the trend information of the waveform changes over time. Based on the technical solution of the present application, the three-dimensional ECG wave overlay diagram and the chromatogram play a role in quick observation and preview. When locating the suspected area of ​​abnormal P waves, the target heart beat samples are screened out by waveform overlay diagram → characteristic parameter scatter diagram → sample diagram. Specifically, the following steps are included:

[0079] a1: Use the waveform overlay to remove the artifacts or messy samples of template 0 through template stripping to ensure that the heartbeat waveform remains basically consistent. Then, specify the time focus area as the P wave area.

[0080] a2: Use the characteristic parameter time scatter plot, select the maximum voltage drop of the forward peak in the upper left corner, and select the outlier points using the scatter plot box.

[0081] a3: Sample graph: Check or review the sample and modify it in batches to the property of premature ejaculation. Complete the positioning and modification of the inverted P wave data.

[0082] After using the technical solution of the present invention, the traditional waveform overlay diagram and the chromatogram are associated through the three-dimensional ECG overlay diagram, and the characteristic parameter time scatter diagram is designed to make up for the problem that the voltage amplitude of the central electric wave of the chromatogram is converted into the depth of color, which makes it difficult for analysts to observe specific data. Based on the graphical analysis tool, rapid review and batch modification of abnormal P waves and T waves in the whole heartbeat are realized, which greatly improves the analysis efficiency and is particularly suitable for the analysis of massive data.

Claims

1. An electrocardiogram analysis method based on a three-dimensional electrocardiogram superposition diagram, characterized in that: It includes the following steps: S1； Obtaining electrocardiogram sample data to be analyzed; S2: Build a graphical analysis tool; The graphical analysis tools include: three-dimensional electrocardiogram overlay diagram, waveform overlay diagram, chromatogram, characteristic parameter scatter diagram and sample diagram; The three-dimensional electrocardiogram superposition diagram is: based on the electrocardiogram sample data to be analyzed, the sampling point sequence number, sample number, and voltage value are used as the coordinates of the X-axis, Y-axis, and Z-axis, and the three-dimensional electrocardiogram curve of each heartbeat data is drawn, and the electrocardiogram waves of all heartbeats are drawn in one image, so as to obtain the three-dimensional electrocardiogram superposition diagram; The waveform superposition diagram is: the electrocardiogram of a fixed length is intercepted with the QRS wave position of each heart beat as the center and the curve is repeatedly drawn; The chromatogram: intercepts a fixed length of electrocardiographic wave with the QRS wave position of each heart beat as the center in time sequence, represents the electrocardiographic wave as a one-dimensional vector of voltage amplitude and puts it into a two-dimensional data matrix column, and finally the two-dimensional data matrix column is displayed by color coding; The characteristic parameter scatter plot: each scatter point represents a heartbeat, the horizontal axis is the heartbeat number, and the vertical axis is the heartbeat characteristic parameter value; the heartbeat characteristic parameter value includes: the statistical voltage average value, the maximum and minimum voltage difference, the maximum voltage and the minimum voltage of each heartbeat in the specified focus time period; The sample graph: for each heartbeat sample, displays the heartbeat electrocardiogram waveform with the R wave as the center; S4: establishing a graphical correspondence between the waveform overlay graph, the chromatogram, the characteristic parameter scatter plot and the sample graph through the three-dimensional electrocardiogram overlay graph; The horizontal coordinate and the vertical coordinate of the waveform superposition diagram correspond to the X-axis coordinate and the Z-axis coordinate of the three-dimensional electrocardiogram superposition diagram; The horizontal coordinate and the vertical coordinate of the chromatogram correspond to the Y-axis coordinate and the X-axis coordinate of the three-dimensional electrocardiogram superposition diagram; The horizontal coordinate of the characteristic parameter scatter plot corresponds to the Y-axis coordinate of the three-dimensional electrocardiogram superposition graph; The sample graph supports displaying a graph of each heartbeat data in the three-dimensional electrocardiogram superposition graph; S5: Based on the graphic correspondence between the graphical analysis tools, construct the data linkage logic between the graphical analysis tools, and perform data linkage on the operations on the heartbeat data between all the graphical analysis tools; S6: based on the waveform overlay graph, find abnormal data with drastic amplitude changes, select the data, and display the selected data in the chromatogram; In the chromatogram, data with obvious changes based on color are found and recorded as: suspect data; Determine a focus time period in which the suspicious data is located, and select the focus time period; S7: marking the suspected data area of ​​the focus time period on the three-dimensional electrocardiogram overlay diagram and the chromatogram; and only displaying the suspected data of the focus time period area in the characteristic parameter scatter diagram and the sample diagram; S8: confirming the heartbeat characteristic parameter value corresponding to the suspected data based on the characteristic parameter scatter plot; Combine the specific waveform of each heartbeat data in the sample graph to locate abnormal data; S9: Based on the sample graph, use the waveform graph of each abnormal data to perform subsequent batch operations on the abnormal data to complete the review and analysis of the abnormal data.

2. The electrocardiogram analysis method based on three-dimensional electrocardiogram superposition diagram according to claim 1, characterized in that: All of the graphical tools are provided in one interface.

3. The electrocardiogram analysis method based on three-dimensional electrocardiogram superposition according to claim 1, characterized in that: The three-dimensional electrocardiogram overlay image supports viewing angle switching, and realizes the change of the three-dimensional image display angle based on the X-axis, Y-axis and Z-axis.

4. The electrocardiogram analysis method based on three-dimensional electrocardiogram superposition according to claim 1, characterized in that: The data linkage logic of the waveform overlay diagram includes: Linkage refresh: When performing template stripping in a specified template, the 3D ECG overlay, chromatogram, characteristic parameter time scatter plot, and sample graph are redrawn at the same time; Select the data area of ​​the waveform overlay graph, calculate the heartbeat samples in the selected area, record them as samples to be redrawn, and input the samples to be redrawn into its image analysis tool for synchronous response; Specify the focus time period; after setting the focus time period in the waveform overlay diagram, calculate the heartbeat characteristic parameter values ​​of all heartbeats and electrocardiograms included in the focus time period in the time period, and redraw the characteristic parameter time scatter plot based on the heartbeat characteristic parameter values; at the same time, other graphical analysis tools respond to the data of the focus time period.

5. The electrocardiogram analysis method based on three-dimensional electrocardiogram superposition according to claim 1, characterized in that: The data linkage logic of the characteristic parameter scatter plot includes: selecting any scatter point, highlighting it in the interfaces of other three-dimensional ECG overlay graphs, chromatograms, and waveform overlay graphs, and displaying the selected sample graph in the sample graph interface.

6. The electrocardiogram analysis method based on three-dimensional electrocardiogram superposition diagram according to claim 1, characterized in that: The data linkage logic of the sample graph includes: selecting any sample and changing the attributes, and the selected sample is highlighted in the interface of other graphical analysis tools.

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