WO2020154910A1

WO2020154910A1 - Method and apparatus for drawing vector cardiographic loop

Info

Publication number: WO2020154910A1
Application number: PCT/CN2019/073746
Authority: WO
Inventors: 刘晓潞; 李上奖
Original assignee: 深圳市科曼医疗设备有限公司
Priority date: 2019-01-29
Filing date: 2019-01-29
Publication date: 2020-08-06

Abstract

A method and apparatus for drawing a vector cardiographic loop. The method comprises: acquiring a known point set of a vector cardiographic loop, wherein the known point set is a set of sampling points obtained by means of sampling the vector cardiographic loop (S101); simulating the contour of the vector cardiographic loop based on the known point set, and using a preset method to add at least one interpolation point between adjacent sampling points, so as to draw the vector cardiographic loop (S102); establishing a unit group composed of the sampling points and an interpolation point set, wherein the interpolation point set is a set of at least one interpolation point located on one side of the sampling points (S103); and determining, based on a display unit of a lacrimal point, a point needing to be displayed, and extracting, according to the point needing to be displayed, at least one interpolation point from an interpolation point set in a unit group corresponding to the point needing to be displayed, so as to draw the lacrimal point, wherein the point needing to be displayed is a sampling point needing to be displayed under the display unit of the lacrimal point (S104). According to the method and apparatus for drawing a vector cardiographic loop, a lacrimal point model can be optimized, the level of drawing a vector cardiographic loop can be improved, and visual misleading of a user can be reduced.

Description

Method and device for drawing electrocardiogram vector loop

Technical field

The invention belongs to the technical field of electrocardiogram vector analysis, and specifically relates to a method and device for drawing an electrocardiogram vector loop.

Background technique

The current ECG vector loop is drawn using discrete data from Frank leads. The discrete data constitutes discrete points, and the tear points of the ECG ring are drawn on these discrete points. The tear points have a large head and a small tail, and the large head points in the direction of the ring. The traditional punctum is in a straight line mode, and the slope adopts the slope value between the current point P _n and the previous point P _n-1 .

In the ECG vector loop, P wave loop, QRS wave loop, and T wave loop are mainly concerned. Because the contours of the P wave ring and the T wave ring are small, and the QRS wave ring has a large contour, at the same sampling rate, when the sampling points of the P wave ring and the T wave ring are dense, the sampling points of the QRS wave ring It may appear sparse. In the case of sparseness, continuing to draw the puncta in a straight line mode will cause the running direction of these puncta to not represent the running direction of the ring at the sampling point. The sparser the point, the less it can represent the overall contour of the ring. When the display unit of the punctum is changed, the above situation is more serious, and even deformity may appear.

Therefore, how to optimize the punctum model, improve the level of drawing the ECG vector loop, and reduce the visual misleading to the user, has become an urgent technical problem to be solved.

Summary of the invention

The technical problem to be solved by the present invention is how to optimize the punctum model, improve the level of drawing the ECG vector loop, and reduce the visual misleading to the user.

To this end, according to the first aspect, an embodiment of the present invention discloses a method for drawing an ECG vector loop, which includes:

Obtain the known point set of the ECG vector loop, the known point set is the set of sampling points obtained by sampling the ECG vector loop; the contour of the ECG vector loop is simulated based on the known point set, and the preset method is used in the phase Add at least one interpolation point between adjacent sampling points to draw the ECG vector loop; establish a unit group consisting of sampling points and interpolation point sets, where the interpolation point set is a set of at least one interpolation point located on one side of the sampling point; based on The display unit of the tear point determines the point to be displayed, and extracts at least one interpolation point from the interpolation point set of the corresponding unit group according to the point to be displayed to draw the tear point. The point to be displayed is the sample that needs to be displayed in the display unit of the tear point. point.

Optionally, the point to be displayed is determined in the display unit based on the punctum, and at least one interpolation point is extracted from the interpolation point set of the unit group corresponding to the point to be displayed to draw the punctum, and the point to be displayed is the display on the punctum After the sampling points that need to be displayed in the unit, it further includes: setting the transparency of at least one interpolation point according to the distance from the at least one interpolation point to the point to be displayed.

Optionally, simulate the contour of the ECG vector loop based on the known point set, and use a preset method to add at least one interpolation point between adjacent sampling points to draw the ECG loop and establish the sampling point and interpolation The unit group composed of point sets, where the interpolation point set is a set of at least one interpolation point located on one side of the sampling point, further includes: storing a known point set and at least one added interpolation point.

Optionally, the preset method is interpolation.

According to the second aspect, an embodiment of the present invention provides an electrocardiogram vector loop drawing device, including:

The known point set module is used to obtain the known point set of the ECG vector loop. The known point set is the set of sampling points obtained by sampling the ECG vector loop; the contour drawing module is used to simulate based on the known point set The contour of the ECG vector loop, and the preset method is used to add at least one interpolation point between adjacent sampling points to draw the ECG vector loop; the unit group establishment module is used to establish a set of sampling points and interpolation points The unit group, the interpolation point set is a collection of at least one interpolation point located on one side of the sampling point; the punctal drawing module is used to determine the point to be displayed based on the display unit of the punctum, and according to the need to display the point from the corresponding unit group At least one interpolation point is extracted from the interpolation point set to draw the punctum, and the point to be displayed is the sampling point that needs to be displayed in the display unit of the punctum.

Optionally, it further includes: a transparency setting module for setting the transparency of at least one interpolation point according to the distance from the at least one interpolation point to the point to be displayed.

Optionally, it further includes: a point set storage module, configured to store the known point set and the added at least one interpolation point.

Optionally, the preset method is interpolation.

According to a third aspect, the present invention provides a computer device, including a processor, configured to execute a computer program stored in a memory to implement the ECG loop drawing method of any one of the above-mentioned first aspect.

According to a fourth aspect, the present invention provides a computer-readable storage medium on which a computer program is stored, and the processor is configured to execute the computer program stored in the storage medium to implement the ECG loop drawing of any one of the above-mentioned first aspect method.

The beneficial effects of the present invention are:

The method and device for drawing an electrocardiogram loop disclosed in the embodiment of the present invention first obtain a known point set of the electrocardiogram loop, and then simulate the contour of the electrocardiogram loop based on the known point set, and adopt a preset method At least one interpolation point is added between adjacent sampling points, and then a unit group consisting of sampling points and interpolation point sets is established, the point to be displayed is determined based on the display unit of the punctum, and the point to be displayed is determined from the corresponding unit according to the point to be displayed At least one interpolation point is extracted from the group to draw the punctum and the ECG vector loop. Compared with the solution in the prior art that draws the punctum and the ECG ring based only on sampling points, the solution disclosed in the embodiment of the present invention adds interpolation points between adjacent sampling points to promote the drawn wave ring to be more smooth and full Instead of the obvious polygonal polygon, it is closer to the shape of the real ECG ring. By adding interpolation points, the punctal model is optimized, which improves the accuracy of the drawn ECG ring shape and reduces the user’s vision Misleading.

In an alternative embodiment, the known point set and the added interpolation points are stored. Regardless of whether the display unit of the punctum is changed or not, the points to be displayed are drawn first, and then the interpolation points in the same unit group as the points to be displayed are queried. And select a certain proportion of interpolation points for drawing, and finally the display points and the interpolation points together form the tear point. Compared with the solution in the prior art that only draws the punctum according to the straight line mode for the display point, it avoids the inconsistency or even deformity that easily occurs after the display unit of the punctum is changed, and improves the tearing when the display unit of the punctum is changed. Point display effect.

Description of the drawings

In order to explain the specific embodiments of the present invention or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings that need to be used in the specific embodiments or the description of the prior art. Obviously, the appendix in the following description The drawings are some embodiments of the present invention. For those skilled in the art, without creative work, other drawings can be obtained from these drawings.

FIG. 1 is a flowchart of a method for drawing an ECG vector loop according to an embodiment of the present invention;

Fig. 2a is a schematic diagram of the contour simulation of a center electric vector loop in the prior art;

2b is a schematic diagram of the contour simulation of the central electric vector loop according to the embodiment of the present invention;

Fig. 3 is a schematic structural diagram of an electrocardiogram vector loop drawing device according to an embodiment of the present invention.

detailed description

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the pointed device or element must have a specific orientation or a specific orientation. The structure and operation cannot therefore be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.

In the description of the present invention, it should be noted that the terms "installation", "connected" and "connected" should be interpreted broadly unless otherwise clearly specified and limited. For example, it can be a fixed connection or a detachable connection. Connected or integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of the two components, which can be a wireless connection or a wired connection connection. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present invention can be understood in specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

Please refer to FIG. 1, which is a flowchart of a method for drawing an ECG vector loop disclosed in this embodiment. The drawing method of the ECG vector loop includes:

Step S101: Obtain a known point set of the ECG vector loop.

In this embodiment, the known point set is a set of sampling points obtained by sampling the ECG vector loop. The user can select different sampling frequencies to sample the points on the known ECG vector loop, and record the coordinates of the sampling points to integrate the known point set.

Step S102: Simulate the contour of the ECG vector loop based on the known point set, and use a preset method to add at least one interpolation point between adjacent sampling points to draw the ECG vector loop.

In this embodiment, the preset method refers to the interpolation method. In the specific implementation process, the sampling points in the known point set are connected by straight lines to simulate the contour of the ECG loop, as shown in Figure 2a, where points i ₁ , i ₂ , i ₃ , and i ₄ , i ₅ , i ₆ , i ₇ , and i ₈ are the sampling points in the known point set. Then use interpolation to add at least one interpolation point between adjacent sampling points, as shown in Figure 2b, where points j ₁ ,j ₂ ,j ₃ ,j ₄ ,j ₅ ,j ₆ ,j ₇ ,j ₈ is the added interpolation point, and then the sampling points and the adjacent interpolation points are connected by straight lines to simulate the contour of the ECG vector loop. Due to the increase in the number of connection points, the drawn ECG vector loop is more The sleek and full body is closer to the real physiological ECG loop.

Step S103, establishing a unit group consisting of sampling points and interpolation point sets.

In this embodiment, the interpolation point set is a set of at least one interpolation point located on one side of the sampling point. In the specific implementation process, since at least one interpolation point is added between two adjacent sampling points, the interpolation points between two adjacent sampling points are respectively formed into an interpolation point set, and the sampling point set is established according to the preset direction. A unit group consisting of a point and an interpolation point set on its side.

In an optional embodiment, between step S102 and step S103, it may further include: storing the known point set and the added at least one interpolation point.

When the display unit of the punctum is changed, the traditional drawing scheme draws the punctum in a straight line mode based only on the need to display the point. As a result, the punctum is prone to inconsistencies in form before and after the display unit is changed, and even deformed punctum occurs. First store the known point set and interpolation points and then establish a unit group. Regardless of whether the display unit of the punctal point is changed, first draw the point to be displayed, and then query the interpolation point set in the same unit group as the point to be displayed, and start from the interpolation point A certain proportion of interpolation points are selected intensively. In a specific embodiment, it is preferable to select an interpolation point that is closer to the point to be displayed, and then draw the selected interpolation point, and finally the point to be displayed and the interpolation point together form a tear point. In this way, no matter how the punctum display unit changes, the shape of the punctum will not change, nor will it appear deformed.

Step S104: Determine the point to be displayed based on the display unit of the punctum, and extract at least one interpolation point from the interpolation point set of the unit group corresponding to the point to be displayed to draw the punctum.

In this embodiment, the point to be displayed is the sampling point that needs to be displayed in the display unit of the current tear point. After determining the points to be displayed, determine the unit group currently to be used according to the determined points to be displayed, and extract at least one interpolation point from the interpolation point set of the unit group, and then draw the points to be displayed and the interpolation points respectively to draw tears point.

Since the display unit of the punctum is larger, the system chooses to display the ECG loop at a smaller sampling rate, which results in fewer sampling points displayed, which means fewer points to be displayed. When the number of points to be displayed is small, the morphology of the drawn punctum will change when drawing the punctum, and even deformity will appear. Using the interpolation point to draw the punctum with the need to be displayed can improve the accuracy of the punctual drawing.

In an optional embodiment, after step S104, the method may further include: respectively setting the transparency of at least one interpolation point according to the distance from the at least one interpolation point to the point to be displayed.

In this embodiment, the transparency of the interpolation point can be adjusted according to the distance between the interpolation point and the point to be displayed. The farther away from the point to be displayed, the smaller the value of transparency. Thus, the length of the punctum with different transparency changes with the amplitude of the ECG vector. When the amplitude changes rapidly, the length becomes longer, otherwise, it becomes smaller. The length of tear spots with different transparency. With this drawing method borrowing from the phenomenon of shooting stars shuttle trajectory in nature, according to the natural common sense of shooting stars, you can know the direction of the tear spots and the relative speed, so that the amount of information expressed by the tear spots Increase and reduce the user’s learning cost.

This embodiment first obtains the known point set of the ECG loop, then simulates the contour of the ECG loop based on the known point set, and uses a preset method to add at least one interpolation point between adjacent sampling points, and then Establish a unit group consisting of sampling points and interpolation point sets, determine the point to be displayed based on the display unit of the punctum, and extract at least one interpolation point from the corresponding unit group based on the point to be displayed to draw the punctum and the ECG vector ring . Compared with the solution in the prior art that only draws the punctum and the ECG ring based on the sampling points, the solution disclosed in the embodiment of the present invention increases the interpolation points between adjacent sampling points to promote the drawn wave ring to be more smooth and full. Rather than the obvious polygonal polygons, it is closer to the shape of the real ECG ring. By adding interpolation points, the punctal model is optimized, and the accuracy of the drawn ECG ring shape is improved.

This embodiment also discloses an electrocardiographic vector loop drawing device. Please refer to FIG. 3, which is a schematic diagram of the structure of the electrocardiographic vector loop drawing device. The electrocardiographic vector loop drawing device includes:

The known point set module 301 is used to obtain the known point set of the ECG vector loop. The known point set is the set of sampling points obtained by sampling the ECG vector loop; the contour drawing module 302 is used to obtain the known points Set to simulate the contour of the ECG vector loop, and use a preset method to add at least one interpolation point between adjacent sampling points to draw the ECG loop; the unit group establishment module 303 is used to establish the sampling point and the interpolation point The interpolation point set is a set of at least one interpolation point located on one side of the sampling point; the punctal drawing module 304 is used to determine the points to be displayed based on the display unit of the punctum, and according to the points to be displayed corresponding to it At least one interpolation point is extracted from the interpolation point set of the unit group to draw the punctum, and the required display point is the sampling point that needs to be displayed in the display unit of the punctum.

In an optional embodiment, the device for drawing the ECG loop further includes: a transparency setting module for setting the transparency of at least one interpolation point according to the distance from the at least one interpolation point to the point to be displayed.

In an optional embodiment, the device for drawing an ECG loop further includes: a point set storage module, configured to store a known point set and at least one added interpolation point.

In the specific implementation process, the preset method is interpolation.

In addition, an embodiment of the present invention also provides a computer device, and the processor executes the computer instruction to implement the following method:

Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing relevant hardware through a computer program. The program can be stored in a computer readable storage medium. During execution, it may include the procedures of the above-mentioned method embodiments. Wherein, the storage medium can be a magnetic disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc. The computer processor is used to execute the computer program stored in the storage medium to implement the following methods:

The above are only the embodiments of the present invention, and common knowledge such as specific structures and characteristics known in the solutions are not described here. It should be pointed out that for those skilled in the art, a number of modifications and improvements can be made without departing from the structure of the present invention. These should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of protection claimed in this application shall be subject to the content of the claims, and the specific implementation modes in the description can be used to interpret the content of the claims.

Claims

A method for drawing an ECG vector loop, which is characterized in that it includes:

Acquiring a known point set of the ECG vector loop, where the known point set is a set of sampling points obtained by sampling the ECG vector loop;

Simulating the contour of the electrocardiogram loop based on the known point set, and adding at least one interpolation point between adjacent sampling points by using a preset method to draw the electrocardiogram loop;

Establishing a unit group consisting of the sampling point and an interpolation point set, where the interpolation point set is a set of at least one interpolation point located on one side of the sampling point;

The point to be displayed is determined based on the display unit of the punctum, and at least one interpolation point is extracted from the interpolation point set of the unit group corresponding to the point to be displayed to draw the punctum, and the point to be displayed is The sampling point that needs to be displayed in the display unit of the tear point.
The method for drawing an electrocardiogram vector loop according to claim 1, wherein the point to be displayed is determined in the display unit based on the punctum, and the point to be displayed is determined from the corresponding unit group according to the point to be displayed. Extracting at least one interpolation point from the interpolation point set to draw a punctum, and the point to be displayed is after the sampling point that needs to be displayed in the display unit of the punctum, and further includes:

The transparency of at least one interpolation point is respectively set according to the distance from at least one interpolation point to the point to be displayed.
The method for drawing an electrocardiogram vector loop according to claim 2, wherein the contour of the electrocardiogram loop is simulated based on the known point set, and a preset method is used to set the At least one interpolation point is added between the sampling points to draw an ECG vector loop and the establishment of a unit group consisting of the sampling points and an interpolation point set, the interpolation point set being at least one located on one side of the sampling point The set of interpolation points further includes:

The known point set and the added at least one interpolation point are stored.
The method for drawing an ECG vector loop according to claim 3, wherein the preset method is interpolation.
An electrocardiogram vector loop drawing device, characterized in that it comprises:

The known point set module is used to obtain a known point set of the ECG vector loop, where the known point set is a set of sampling points obtained by sampling the ECG vector loop;

The contour drawing module is configured to simulate the contour of the ECG vector loop based on the known point set, and add at least one interpolation point between adjacent sampling points by using a preset method to draw the ECG vector loop ；

A unit group establishment module, configured to establish a unit group consisting of the sampling point and an interpolation point set, the interpolation point set being a set of at least one interpolation point located on one side of the sampling point;

The punctum drawing module is used to determine the point to be displayed based on the display unit of the punctum, and extract at least one interpolation point from the interpolation point set of the unit group corresponding to the point to be displayed to draw the punctum , The point to be displayed is the sampling point that needs to be displayed in the display unit of the tear point.
The drawing device of the ECG vector loop according to claim 5, further comprising:

The transparency setting module is used to set the transparency of at least one interpolation point according to the distance from at least one interpolation point to the point to be displayed.
The drawing device of the ECG vector loop according to claim 6, characterized in that it further comprises:

The point set storage module is used to store the known point set and the added at least one interpolation point.
8. The drawing device of the ECG vector loop according to claim 7, wherein the preset method is an interpolation method.
A computer device, characterized by comprising a processor, configured to execute a computer program stored in a memory to implement the ECG loop drawing method according to any one of claims 1-4.
A computer-readable storage medium with a computer program stored thereon, wherein the processor is used to execute the computer program stored in the storage medium to implement the method for drawing an ECG loop according to any one of claims 1 to 4 .