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Three-Dimensional Visualization of Myocardial Ischemia Based on the Standard Twelve-Lead Electrocardiogram.

Ma Y, Sheng Y, Ruixia T, Xun C - Comput Math Methods Med (2016)

Bottom Line: A novel method was proposed for transforming the ischemic information in the 12-lead electrocardiogram (ECG) into the pseudo-color pattern displayed on a 3D heart model based on the projection of a ST injury vector in this study.The projection of the ST injury vector at a point on the heart surface was used for identifying the presence of myocardial ischemia by the difference between the projection value and the detection threshold.In addition, the diagnostic accuracy of the proposed method was further confirmed by the coronary angiography.

View Article: PubMed Central - PubMed

Affiliation: Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, Anhui 230027, China.

ABSTRACT
A novel method was proposed for transforming the ischemic information in the 12-lead electrocardiogram (ECG) into the pseudo-color pattern displayed on a 3D heart model based on the projection of a ST injury vector in this study. The projection of the ST injury vector at a point on the heart surface was used for identifying the presence of myocardial ischemia by the difference between the projection value and the detection threshold. Supposing that myocardial ischemia was uniform and continuous, the location and range of myocardial ischemia could be accurately calculated and visually displayed in a color-encoding way. The diagnoses of the same patient were highly consistent (kappa coefficient k = 0.9030) between the proposed method used by ordinary people lacking medical knowledge and the standard 12-lead ECG used by experienced cardiologists. In addition, the diagnostic accuracy of the proposed method was further confirmed by the coronary angiography. The results of this study provide a new way to promote the development of the 3D visualization of the standard 12-lead ECG, which has a great help for inexperienced doctors or ordinary family members in their diagnosis of patients with myocardial ischemia.

No MeSH data available.


Related in: MedlinePlus

Comparison before and after the operation of coronary stent implantation. (a) Pattern before the stent implantation. (b) Pattern at two weeks after the stent implantation.
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fig5: Comparison before and after the operation of coronary stent implantation. (a) Pattern before the stent implantation. (b) Pattern at two weeks after the stent implantation.

Mentions: Coronary stent implantation is another scheme reliable to verify the display of myocardial ischemia on the 3D heart model. The myocardial tissue in ischemia due to coronary artery stenosis will restore the normal blood supply after stent implantation. It should be noted that the complete recovery of the normal blood supply to the cardiomyocytes is about two weeks after the stent is placed. Figure 5(a) presented the region of myocardial ischemia on the 3D heart model of a 65-year-old male patient. Coronary angiography confirmed that his left anterior descending artery was stenosed by 70%. Two weeks after his stent implantation, the patient's pattern on the 3D heart model had been detected as shown in Figure 5(b). The myocardial ischemic region shown in Figure 5(a) completely disappeared here.


Three-Dimensional Visualization of Myocardial Ischemia Based on the Standard Twelve-Lead Electrocardiogram.

Ma Y, Sheng Y, Ruixia T, Xun C - Comput Math Methods Med (2016)

Comparison before and after the operation of coronary stent implantation. (a) Pattern before the stent implantation. (b) Pattern at two weeks after the stent implantation.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4940520&req=5

fig5: Comparison before and after the operation of coronary stent implantation. (a) Pattern before the stent implantation. (b) Pattern at two weeks after the stent implantation.
Mentions: Coronary stent implantation is another scheme reliable to verify the display of myocardial ischemia on the 3D heart model. The myocardial tissue in ischemia due to coronary artery stenosis will restore the normal blood supply after stent implantation. It should be noted that the complete recovery of the normal blood supply to the cardiomyocytes is about two weeks after the stent is placed. Figure 5(a) presented the region of myocardial ischemia on the 3D heart model of a 65-year-old male patient. Coronary angiography confirmed that his left anterior descending artery was stenosed by 70%. Two weeks after his stent implantation, the patient's pattern on the 3D heart model had been detected as shown in Figure 5(b). The myocardial ischemic region shown in Figure 5(a) completely disappeared here.

Bottom Line: A novel method was proposed for transforming the ischemic information in the 12-lead electrocardiogram (ECG) into the pseudo-color pattern displayed on a 3D heart model based on the projection of a ST injury vector in this study.The projection of the ST injury vector at a point on the heart surface was used for identifying the presence of myocardial ischemia by the difference between the projection value and the detection threshold.In addition, the diagnostic accuracy of the proposed method was further confirmed by the coronary angiography.

View Article: PubMed Central - PubMed

Affiliation: Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, Anhui 230027, China.

ABSTRACT
A novel method was proposed for transforming the ischemic information in the 12-lead electrocardiogram (ECG) into the pseudo-color pattern displayed on a 3D heart model based on the projection of a ST injury vector in this study. The projection of the ST injury vector at a point on the heart surface was used for identifying the presence of myocardial ischemia by the difference between the projection value and the detection threshold. Supposing that myocardial ischemia was uniform and continuous, the location and range of myocardial ischemia could be accurately calculated and visually displayed in a color-encoding way. The diagnoses of the same patient were highly consistent (kappa coefficient k = 0.9030) between the proposed method used by ordinary people lacking medical knowledge and the standard 12-lead ECG used by experienced cardiologists. In addition, the diagnostic accuracy of the proposed method was further confirmed by the coronary angiography. The results of this study provide a new way to promote the development of the 3D visualization of the standard 12-lead ECG, which has a great help for inexperienced doctors or ordinary family members in their diagnosis of patients with myocardial ischemia.

No MeSH data available.


Related in: MedlinePlus