Limits...
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

Spatial distribution of the lead subvectors on the frontal and horizontal plane.
© Copyright Policy
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4940520&req=5

fig2: Spatial distribution of the lead subvectors on the frontal and horizontal plane.

Mentions: A ST injury vector could be decomposed into two orthogonal subvectors, on the horizontal plane and on the frontal plane. The lead subvectors used for the synthesis of and were distributed on the above two planes, respectively. The vectors () corresponding to limb leads and augmented limb leads (I, II, III, aVR, aVL, aVF) were distributed on the frontal plane, while the vectors () corresponding to chest leads (V1, V2,…, V6) distributed on the horizontal plane [20–23]. In the orthogonal XYZ coordinate system, the x-y plane is the frontal plane and the x-z plane is the horizontal plane. It is worth noting that all vectors and subvectors are starting from the center point of the left ventricle. Respectively (see Figure 2), the limb-lead vectors () and augmented-limb-lead vectors point to 0° (I), 60° (II), 120° (III), 30° (−aVR), −30° (aVL), and 90° (aVF) on the x-y plane; and the chest-lead vectors () point to 115° (V1), 90° (V2), 65° (V3), 40° (V4), 15° (V5), and −10° (V6) on the x-z plane.


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)

Spatial distribution of the lead subvectors on the frontal and horizontal plane.
© Copyright Policy
Related In: Results  -  Collection

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

fig2: Spatial distribution of the lead subvectors on the frontal and horizontal plane.
Mentions: A ST injury vector could be decomposed into two orthogonal subvectors, on the horizontal plane and on the frontal plane. The lead subvectors used for the synthesis of and were distributed on the above two planes, respectively. The vectors () corresponding to limb leads and augmented limb leads (I, II, III, aVR, aVL, aVF) were distributed on the frontal plane, while the vectors () corresponding to chest leads (V1, V2,…, V6) distributed on the horizontal plane [20–23]. In the orthogonal XYZ coordinate system, the x-y plane is the frontal plane and the x-z plane is the horizontal plane. It is worth noting that all vectors and subvectors are starting from the center point of the left ventricle. Respectively (see Figure 2), the limb-lead vectors () and augmented-limb-lead vectors point to 0° (I), 60° (II), 120° (III), 30° (−aVR), −30° (aVL), and 90° (aVF) on the x-y plane; and the chest-lead vectors () point to 115° (V1), 90° (V2), 65° (V3), 40° (V4), 15° (V5), and −10° (V6) on the x-z plane.

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