CN103431857A - Method for automatically scanning suspicious T wave alteration (TWA) positive sections of Holter - Google Patents
Method for automatically scanning suspicious T wave alteration (TWA) positive sections of Holter Download PDFInfo
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- CN103431857A CN103431857A CN2013104040802A CN201310404080A CN103431857A CN 103431857 A CN103431857 A CN 103431857A CN 2013104040802 A CN2013104040802 A CN 2013104040802A CN 201310404080 A CN201310404080 A CN 201310404080A CN 103431857 A CN103431857 A CN 103431857A
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Abstract
The invention discloses a method for automatically scanning suspicious T wave alteration (TWA) positive sections of a Holter. The method comprises the following steps: scanning the whole course Holter, sorting suspicious fragments which meet TWA positive clinical indexes, and further determining the fragments by a doctor. According to the method, the suspicious TWA positive sections can be effectively screened and are further diagnosed and determined by the doctor, so that the phenomenon that the doctor wholly backward reads the Holter is avoided, and the workload of the doctor is greatly reduced.
Description
Technical field
The present invention relates to the processing of biomedical signals field, particularly the method for the positive section of the suspicious TWA of a kind of automatic scam ambulatory electrocardiogram.
Background technology
The phenomenon of alternate occurs in T wave-amplitude, the form of T ripple electrical alternations (TWA) while referring to sinus rhythm on electrocardiogram between the adjacent heart is clapped.TWA phenomenon and acute myocardial ischemia, Q-T extend syndrome, coronary atherosclerosis, electrolyte disturbance etc. close contacting, and has become the important and index very intuitively of of identification sudden cardiac death high-risk patient at present.The TWA phenomenon generally only has the microvolt magnitude, and on surface electrocardiogram, naked eyes are difficult to differentiate, and need the computer signal processing technology to be detected.The detection method of TWA mainly contains frequency domain method and time domain method, and wherein time-domain analysis is comparatively directly perceived, and not limited by heart rate, under noise, also can be detected, and is widely used in ambulatory electrocardiogram (Holter) inspection.At present, the flow process that commercialization Holter detects the TWA phenomenon is usually as follows: the doctor is an autonomous selected starting point in omnidistance ambulatory electrocardiogram, then the individual heart of the N (be generally 128) of analysis software after to this starting point is clapped and is analyzed, obtain the TWA time domain index, finally determine whether the positive section of TWA by the doctor again.Under such flow process, the doctor need to carry out omnidistance retaking of a year or grade to ambulatory electrocardiogram just can be confirmed whether to exist the positive section of TWA.Yet the collection duration of ambulatory electrocardiogram generally about 24 hours, relates to the heart that surpasses 100,000 and claps, therefore this by the doctor by hand the method for selected Analysis Block waste time and energy very much.
Summary of the invention
For above-mentioned prior art, the invention provides the method for the positive section of the suspicious TWA of a kind of automatic scam ambulatory electrocardiogram, purpose is scanned omnidistance ambulatory electrocardiogram, picks out the suspicious fragment that meets the positive clinical indices of TWA, for the doctor, do further to determine, to alleviate doctor's workload.In the daily life of detected person in continuous variation, ambulatory electrocardiogram is easy to be subject to various types of interference, the especially motion artifacts that non-cardiomotility causes, can greatly improve the false positive rate that TWA detects.A key of therefore, omnidistance ambulatory electrocardiogram being carried out to the positive section scanning of suspicious TWA is to identify and meets the steady electrocardiogram fragment of hole that the TWA time-domain analysis requires.
The technical solution used in the present invention is: the method for the positive section of the suspicious TWA of a kind of automatic scam ambulatory electrocardiogram is characterized in that: said method comprising the steps of:
S1. the omnidistance heart of ambulatory electrocardiogram is clapped and carried out quick morphology clustering;
S2. clap the ripple code according to the heart and with cluster result, the omnidistance heart is clapped and carried out labelling, by the ripple code, normal and cluster number is greater than 3 heart bat and is labeled as 1, and all the other are labeled as 0;
The mark value of S3. each heart being clapped is carried out Local Integral with length N, if integrated value is less than N/2, the heart is clapped to labelling and reset to 0, otherwise reset to 1, wherein N >=5 and N≤20;
S4. it is abscissa that the heart of take is clapped sequence number, and mark value is vertical coordinate, obtains curve C; Fill up length in C and be less than the null value space of N, and then remove the 1 value line segment that length is less than 128, obtain steady characteristic curve.Wherein, 1 value line segment in steady characteristic curve is to meet the steady electrocardiogram fragment of hole that the TWA time-domain analysis requires;
S5. to the steady electrocardiogram fragment of the hole marked, 128 hearts of take are clapped as unit and are carried out the TWA time-domain analysis.If analysis indexes has reached clinical threshold value, be labeled as the positive section of suspicious TWA, then skip 128 current hearts and clap the continuation analysis; Otherwise, skip 10 hearts and clap the continuation analysis.So repeat, until the steady electrocardiogram fragment of all holes is all analyzed complete.
Further, the testing result that the described heart is clapped the ripple code comprises normally, artrial premature beat, ventricular premature contraction, pace-making, artifact.
The invention has the beneficial effects as follows: can effectively filter out the positive section of suspicious TWA, do further diagnosis and confirm for the doctor, thereby avoided the omnidistance retaking of a year or grade of doctor to ambulatory electrocardiogram, greatly reduce the working doctor amount.
The accompanying drawing explanation
Fig. 1 is that the heart is clapped the Sequence Detection result schematic diagram.
The specific embodiment
Below in conjunction with accompanying drawing and the specific embodiment, the present invention is described in more detail.
As shown in Figure 1, the method for the positive section of the suspicious TWA of a kind of automatic scam ambulatory electrocardiogram said method comprising the steps of:
S1. the omnidistance heart of ambulatory electrocardiogram is clapped and carried out quick morphology clustering;
S2. clap the ripple code according to the heart and with cluster result, the omnidistance heart is clapped and carried out labelling, by the ripple code, normal and cluster number is greater than 3 heart bat and is labeled as 1, and all the other are labeled as 0;
The mark value of S3. each heart being clapped is carried out Local Integral with length N, if integrated value is less than N/2, the heart is clapped to labelling and reset to 0, otherwise reset to 1, wherein N >=5 and N≤20;
S4. it is abscissa that the heart of take is clapped sequence number, and mark value is vertical coordinate, obtains curve C; Fill up length in C and be less than the null value space of N, and then remove the 1 value line segment that length is less than 128, obtain steady characteristic curve.Wherein, 1 value line segment in steady characteristic curve is to meet the steady electrocardiogram fragment of hole that the TWA time-domain analysis requires;
S5. to the steady electrocardiogram fragment of the hole marked, 128 hearts of take are clapped as unit and are carried out the TWA time-domain analysis.If analysis indexes has reached clinical threshold value, be labeled as the positive section of suspicious TWA, then skip 128 current hearts and clap the continuation analysis; Otherwise, skip 10 hearts and clap the continuation analysis.So repeat, until the steady electrocardiogram fragment of all holes is all analyzed complete.
Wherein, the testing result that the described heart is clapped the ripple code comprises normally, artrial premature beat, ventricular premature contraction, pace-making, artifact.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (2)
1. the method for the positive section of the suspicious TWA of an automatic scam ambulatory electrocardiogram is characterized in that: said method comprising the steps of:
S1. the omnidistance heart of ambulatory electrocardiogram is clapped and carried out quick morphology clustering;
S2. clap the ripple code according to the heart and with cluster result, the omnidistance heart is clapped and carried out labelling, by the ripple code, normal and cluster number is greater than 3 heart bat and is labeled as 1, and all the other are labeled as 0;
The mark value of S3. each heart being clapped is carried out Local Integral with length N, if integrated value is less than N/2, the heart is clapped to labelling and reset to 0, otherwise reset to 1, wherein N >=5 and N≤20;
S4. it is abscissa that the heart of take is clapped sequence number, and mark value is vertical coordinate, obtains curve C; Fill up length in C and be less than the null value space of N, and then remove the 1 value line segment that length is less than 128, obtain steady characteristic curve.Wherein, 1 value line segment in steady characteristic curve is to meet the steady electrocardiogram fragment of hole that the TWA time-domain analysis requires;
S5. to the steady electrocardiogram fragment of the hole marked, 128 hearts of take are clapped as unit and are carried out the TWA time-domain analysis.If analysis indexes has reached clinical threshold value, be labeled as the positive section of suspicious TWA, then skip 128 current hearts and clap the continuation analysis; Otherwise, skip 10 hearts and clap the continuation analysis.So repeat, until the steady electrocardiogram fragment of all holes is all analyzed complete.
2. the method for the positive section of the suspicious TWA of a kind of automatic scam ambulatory electrocardiogram according to claim 1 is characterized in that: the testing result that the described heart is clapped the ripple code comprises normally, artrial premature beat, ventricular premature contraction, pace-making, artifact.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104644160A (en) * | 2015-03-18 | 2015-05-27 | 电子科技大学 | Electrocardiogram pseudo-difference signal identification method and device |
| CN111281378A (en) * | 2020-02-13 | 2020-06-16 | 苏州百慧华业精密仪器有限公司 | Method and device for screening suspected T-wave electricity alternate sections in dynamic electrocardiogram |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104644160A (en) * | 2015-03-18 | 2015-05-27 | 电子科技大学 | Electrocardiogram pseudo-difference signal identification method and device |
| CN111281378A (en) * | 2020-02-13 | 2020-06-16 | 苏州百慧华业精密仪器有限公司 | Method and device for screening suspected T-wave electricity alternate sections in dynamic electrocardiogram |
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Application publication date: 20131211 |