CN103637797A - ST-segment injury vector compasses-based displaying and positioning method for myocardial blood sector - Google Patents
ST-segment injury vector compasses-based displaying and positioning method for myocardial blood sector Download PDFInfo
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- CN103637797A CN103637797A CN201310723918.4A CN201310723918A CN103637797A CN 103637797 A CN103637797 A CN 103637797A CN 201310723918 A CN201310723918 A CN 201310723918A CN 103637797 A CN103637797 A CN 103637797A
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- 230000006378 damage Effects 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000002107 myocardial effect Effects 0.000 title claims abstract description 18
- 239000008280 blood Substances 0.000 title claims abstract description 17
- 210000004369 blood Anatomy 0.000 title claims abstract description 17
- 208000027418 Wounds and injury Diseases 0.000 title abstract 3
- 208000014674 injury Diseases 0.000 title abstract 3
- 238000005259 measurement Methods 0.000 claims description 6
- 230000004807 localization Effects 0.000 claims description 5
- 230000000007 visual effect Effects 0.000 claims description 4
- 210000005240 left ventricle Anatomy 0.000 claims description 3
- 230000003190 augmentative effect Effects 0.000 abstract 1
- 239000011159 matrix material Substances 0.000 description 5
- 238000000205 computational method Methods 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 206010000891 acute myocardial infarction Diseases 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000013399 early diagnosis Methods 0.000 description 1
- 230000037149 energy metabolism Effects 0.000 description 1
- 230000005802 health problem Effects 0.000 description 1
- 230000010247 heart contraction Effects 0.000 description 1
- 230000001951 hemoperfusion Effects 0.000 description 1
- 230000000302 ischemic effect Effects 0.000 description 1
- 230000003680 myocardial damage Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000001575 pathological effect Effects 0.000 description 1
- 201000007094 prostatitis Diseases 0.000 description 1
- 230000003716 rejuvenation Effects 0.000 description 1
- 230000017105 transposition Effects 0.000 description 1
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Abstract
The invention discloses an ST-segment injury vector compasses-based displaying and positioning method for a myocardial blood sector. The displaying and positioning method comprises the specific steps as follows: placing the 10 electrodes of ECG equipment on fixed positions of a human body; acquiring the electrocardiosignals of 12 leads; analyzing to obtain the deviants of the 12 leads and displaying the deviants on the compasses (including a horizontal compass and a vertical compass), wherein the chest leads V1-V6 are placed in the horizontal plane, and the limb leads I-III and the augmented leads aVR-aVF are placed on the vertical plane; calculating a spatial vector according to the method of solving an inconsistent equation set by least square; projecting the spatial vector on the two planar compasses respectively to obtain an ST-segment injury vector compass graph.
Description
Technical field
The present invention relates to the technical field of myocardial blood damage method for expressing, particularly relate to a kind of demonstration of myocardial blood sector and localization method that damages vectorial compass based on ST section.
Background technology
Myocardial blood damage, refers to that the hemoperfusion of heart reduces, and causes the oxygen supply of heart to reduce, and energy metabolism of myocardial is undesired, can not support a kind of pathological state of the normal work of heart.The M & M of ischemic heart desease is positioned at the prostatitis of world pop disease, especially the main health problem of western developed country.The health of myocardial blood damage serious harm middle-aged and elderly people, in recent years along with growth in the living standard, myocardial blood damage presents the trend of rejuvenation, and also there is this phenomenon in the youngster in some 20-30 year.We have proposed the ST damage vector based on ST field offset, for demonstration and the location of myocardial blood sector.
Summary of the invention
The technical issues that need to address of the present invention are: propose a kind of method of the damage vector compass graph based on ST field offset value, for myocardial blood sector, show and localization method.。
Technical scheme of the present invention is:
A kind of demonstration of myocardial blood sector and localization method that damages vectorial compass based on ST section.The method comprises that calculating, the ST of the obtaining of electrocardiosignal, ST field offset amount damage the realization of vectorial algorithm and compass graph, wherein:
Obtaining by ECG collecting device of electrocardiosignal completes.The hardware components of equipment comprises: the input that receives the signal leading from ECG; Processor, this processor uses ADS1298 that the electrocardiosignal of electrode collection is converted into digital signal, and digital signal is processed and is transferred to computer through FPGA; Computer, controls the working method of ADS1298 by host computer procedure, demonstrate on computers measured original electrocardiographicdigital signal.
Ten electrodes are placed on respectively to the fixed position of the person; gather 12 lead electrocardiosignal; after signal-obtaining, it is carried out to pretreatment; a complete electrocardiosignal, in the cycle, find the wave band of electrocardiosignal amplitude maximum, be assumed to be R ripple; getting so each 108ms place after R ripple is ST measurement point; R wavefront 80ms place is isoelectric level reference point, and the potential value of 2 is used for respectively characterizing potential value V1 and reference potential value V0, the side-play amount VST=V1-V0 of ST section of ST section measurement point; The ST field offset value of 12 lead thus method is obtained successively.
Obtain after the side-play amount of each ST-Segment, be presented on compass graph, obtain ST compass graph.Wherein chest lead (V1-V6) is positioned at horizontal plane, and limb lead (I-III) and augmented-lead (aVR-aVF) are positioned on vertical.The object that proposes ST compass is that the size and Orientation of ST deviant (raise or force down) is visual, is just easy to find out like this drift condition of ST section from figure, this also just with the difference place of standard cardioelectric figure.ST compass is comprised of 5 concentric circulars, and its radius is respectively 1,2 ... 5(unit: mm), 1mm=0.1mV.In theory, the center that the center of ST compass is heart left ventricle.ST section raise time, arrow points to corresponding positive direction of leading (being the direction of dotted line) by the center of compass; While forcing down, point to corresponding opposite direction of leading.The length of arrow is to be determined by the size of ST deviant.With ST compass graph, carry out the vector analysis of ST side-play amount, represent space vector measurement ST deviation, ST compass graph can be visual the ST field offset situation of standard twelve-lead electrocardiogram.
The value of ST damage vector in myocardial blood damage obtains ST damage vector depending on the ST deviant of how to lead from 12, and what in the present invention, adopt is the method for least square solution inconsistent equation group.In Matlab software, by least square solution inconsistent equation batch total, calculate a total vector, i.e. ST damage vector.Respectively lead and damage the direction vector group that vectorial mould=total damage vector respectively leads, have contradiction solution when equation solution always damages vector thus, the transposition of direction Vector Groups is taken advantage of on the both sides while right side of equation, draws the least square solution that total damage is vectorial.ST damage vector provides a representative ST deviant of easily explaining, clinical and EMT, or doctor is particularly useful in the early diagnosis acute myocardial infarction of emergency department.ST damage vector is a space vector, and it is projected in respectively on two plane compass of horizontal and vertical, obtains ST and damages vectorial compass graph, and in figure, the direction of vectorial indication is exactly the position of myocardial blood damage, and length is the degree of myocardial blood damage.
The present invention's advantage is compared with prior art:
(1) accuracy is high.The method has very strong theoretical foundation, by a large amount of experimental datas, proves, the method is practicable.
(2) readability directly perceived.Compare with conventional twelve-lead electrocardiogram, the present invention is by the information of myocardial blood damage with a vector representation, and it is presented on compass graph, is easy to like this read vectorial size and Orientation.
These and other features of the present invention and advantage will be become and will be easier to understand by following detailed description of the present invention.
Accompanying drawing explanation
Accompanying drawing has below been described some exemplary of the present invention, and these embodiments of describing are interpreted as exemplary illustration of the present invention and are not the restrictions of any mode.
Fig. 1 is the 12 lead location drawing;
The 12 lead electrocardiosignal of Fig. 2 for going out by ECG testing of equipment;
Fig. 3 is the computational methods of ST deviant;
Fig. 4 is ST field offset value compass graph;
Fig. 5 is that ST damages vectorial compass graph.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
Fig. 1 has described 12 particular locations that lead.The figure on the left side represents the vertical plane of two-dimensional sub-spaces, and the cardioelectric field projection of heart wherein.Therefore, the figure shows vertically lead six axles of (being aVF, III, aVL, I, aVR, II (clockwise)) of 12 six of leading ECG and form, as shown in the table:
| Lead | Angle |
| Ⅰ | 0° |
| Ⅱ | 60° |
| Ⅲ | 120° |
| aVL | -30° |
| aVR | -150° |
| aVF | 90° |
The figure on the right represents the horizontal plane of two-dimensional sub-spaces, therefore by leading with 12 six horizontal Wilson that lead in ECG (being that V6, V5, V4, V3, V2, V1(are clockwise)) six axles form, as shown in the table:
| Lead | Angle |
| V 1 | 115° |
| V 2 | 90° |
| V 3 | 65° |
| V 4 | 40° |
| V 5 | 15° |
| V 6 | -10° |
The 12 lead electrocardiosignal figure that Fig. 2 is a patient going out by ECG testing of equipment, is I-III from top to bottom successively in figure, aVL-aVF, and V1-V6 leads.
Fig. 3 is the computational methods of ST deviant.Electrocardiosignal is carried out level and smooth pretreatment to it after reading, and within a complete cycle, finds out the peak swing place of each heart beating, as the amplitude of the R wave crest point in Fig. 3 is the peak swing of a heartbeat signal.Determine after R wave crest point, getting each 108ms place after R ripple is ST measurement point, and R wavefront 80ms place is isoelectric level reference point, and the potential value of 2 is used for respectively characterizing potential value V1 and the reference potential value V0 of ST section, the deviant VST=V1-V0 of ST section; The ST field offset value of 12 lead thus method is obtained successively.
Fig. 4 is the compass graph of a patient ST deviant, has shown each ST field offset value of leading of these patient's 12 lead electrocardiogram in figure.12 ST deviants of leading (when ST section is raised on the occasion of, be negative value while forcing down) as shown in the table wherein:
| Lead | ST（mm） |
| Ⅰ | -0.6 |
| Ⅱ | 2.3 |
| Ⅲ | 3.4 |
| aVR | -1.2 |
| aVL | -1.9 |
| aVF | 3.4 |
| V1 | -1.8 |
| V2 | -3.6 |
| V3 | -2.9 |
| V4 | -1.4 |
| V5 | 0.6 |
| V6 | 1.4 |
Compass is comprised of 5 concentric circulars, and its radius is respectively 1,2 ... 5(unit: mm), 1mm=0.1mV.In theory, the center that the center of compass is heart left ventricle.ST section raise time, arrow points to corresponding positive direction of leading (being the direction of dotted line) by the center of compass; While forcing down, point to corresponding opposite direction of leading.The length of arrow is to be determined by the size of ST deviant.
The ST field offset value of 12 lead is the projection of space total ST damage vector on respectively leading.The direction of known every axis of leads, measures after the ST field offset value of 12 lead, by solving inconsistent equation group, solves ST damage vector.Concrete grammar solves as follows:
If matrix A is direction matrix, b is ST field offset value matrix, and the ST damage vector matrix on vertical is x, can form equation group below: Ax=b.Matrix A, b, x are respectively:
b＝(st
I?st
II?st
III?st
aVL?st
aVR?st
aVF)
T
x＝(x
f?y
f)
T
Wherein: θ
i, θ
iI... θ
aVFthe angle of leading for corresponding subscript; St
i, st
iI... st
aVFthe ST field offset value of leading for corresponding subscript; x
f, y
fcoordinate figure for the projection on vertical of ST damage vector.
Because above equation group is inconsistent equation group, by linear algebra knowledge, equation group A
tax=A
tthe solution of b is exactly the least square solution of inconsistent equation group Ax=b.Therefore solving equations A
tax=A
tthe value that b obtains is the coordinate of ST damage vector on vertical; In like manner can obtain the coordinate of ST damage vector on horizontal plane.By solving the ST damage vector obtaining, be illustrated respectively on two plane compass of horizontal and vertical, ST damages vectorial compass graph.
The ST that Fig. 5 is this patient damages vectorial compass graph, has shown the information of this patient's myocardial blood in figure.As can be seen from the figure, this patient's myocardial damage region is lower wall and rear wall.
Claims (5)
1. a myocardial blood sector of damaging vectorial compass based on ST section shows and localization method, it is characterized in that: the fixed position that ten electrodes of ECG equipment is placed on respectively to the person, gather 12 lead electrocardiosignal, the deviant that analysis obtains respectively leading, and this deviant is presented on compass, wherein chest lead V1-V6 is positioned at horizontal plane, and limb lead I-III and augmented-lead aVR-aVF are positioned at vertical; Finally the method by least square solution inconsistent equation group calculates a space vector, and it is projected in respectively on two plane compass, obtains ST and damages vectorial compass graph.
2. method according to claim 1, it is characterized in that: the method for expressing of 12 lead in two dimensional compass, the lead angle of V6, V5, V4, V3, V2, V1 of six levels respectively is clockwise :-10 °, 15 °, 40 °, 65 °, 90 °, 115 °; Six aVF that vertically lead, III, aVL, I, aVR, the clockwise angles of II respectively are: 90 °, 120 ° ,-30 °, 0 ° ,-150 °, 60 °.
3. method according to claim 1, is characterized in that: comprise by the twelve-lead electrocardiogram of measuring and calculate ST field offset value; Ten electrodes are placed on respectively to the fixed position of the person; gather 12 lead electrocardiosignal; after signal-obtaining, it is carried out to pretreatment; a complete electrocardiosignal, in the cycle, find the wave band of electrocardiosignal amplitude maximum, be assumed to be R ripple; getting so each 108ms place after R ripple is ST measurement point; R wavefront 80ms place is isoelectric level reference point, and the potential value of 2 is used for respectively characterizing potential value V1 and reference potential value V0, the side-play amount VST=V1-V0 of ST section of ST section; The ST field offset value of 12 lead is obtained successively with reference to this method.
4. method according to claim 1, is characterized in that: comprise the deviant of each ST-Segment is presented on compass graph, obtain ST compass graph; Wherein chest lead V1-V6 is positioned at horizontal plane, and limb lead I-III and augmented-lead aVR-aVF are positioned on vertical; The object that proposes ST compass is that the size and Orientation of ST deviant (raise or force down) is visual, is just easy to find out like this drift condition of ST section from figure; ST compass is comprised of 5 concentric circulars, and its radius is respectively 1,2 ... 5, unit is mm, and 1mm represents 0.1mV, in theory, and the center that the center of ST compass is heart left ventricle; When ST section is raised, arrow points to corresponding positive direction of leading by the center of compass, and the direction of dotted line, while forcing down, points to corresponding opposite direction of leading, and the length of arrow is that the size by ST deviant determines; With ST compass graph, carry out the vector analysis of ST deviant, represent space vector measurement ST deviation, ST compass graph can be visual the ST field offset situation of standard twelve-lead electrocardiogram.
5. method according to claim 1, is characterized in that: also comprise that ST damages the method for expressing of vectorial compass; According to ST field offset value, by the method for least square solution inconsistent equation group, obtain total ST damage vector, be then projected on two plane compass of horizontal and vertical, obtain ST and damage vectorial compass graph.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108618777A (en) * | 2017-03-20 | 2018-10-09 | 深圳市理邦精密仪器股份有限公司 | The processing method and processing device of ST segment signals, cardioelectric monitor equipment in electrocardiosignal |
| CN112386264A (en) * | 2020-11-13 | 2021-02-23 | 深圳市凯沃尔电子有限公司 | Method and device for carrying out graphical display on ST-section data in multi-lead data |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0545628A2 (en) * | 1991-11-29 | 1993-06-09 | Cardiac Pacemakers, Inc. | Method and apparatus for comparing the ST segment of an electrocardiogram with a stored template |
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| US20070208260A1 (en) * | 2005-09-15 | 2007-09-06 | Afonso Valtino X | System and method for mapping complex fractionated electrogram information |
| US20100049067A1 (en) * | 2008-08-21 | 2010-02-25 | Mr Holdings (Hk) Ltd. | Systems and methods for quantifying and providing indicia of st-segment resolution in an ecg signal |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108618777A (en) * | 2017-03-20 | 2018-10-09 | 深圳市理邦精密仪器股份有限公司 | The processing method and processing device of ST segment signals, cardioelectric monitor equipment in electrocardiosignal |
| CN112386264A (en) * | 2020-11-13 | 2021-02-23 | 深圳市凯沃尔电子有限公司 | Method and device for carrying out graphical display on ST-section data in multi-lead data |
| CN112386264B (en) * | 2020-11-13 | 2022-11-22 | 深圳市凯沃尔电子有限公司 | Method and device for carrying out graphical display on ST-section data in multi-lead data |
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