The function of the left ventricular myocardial segments assessed by velocity vector imaging in patients with a myocardial infarction before and after coronary artery bypass
Rationale: Velocity vector imaging is a non-invasive technique to analyze left ventricle (LV) fibers and determine the depth and area of an ischemic injury and the response to revascularization.Aim: To assess LV functional parameters in patients with non Q-wave myocardial infarction and Q-wave myoca...
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| Format: | Article |
| Language: | Russian |
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MONIKI
2017-06-01
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| Series: | Alʹmanah Kliničeskoj Mediciny |
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| Online Access: | https://www.almclinmed.ru/jour/article/view/541 |
| _version_ | 1818886775826808832 |
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| author | E. B. Petrova |
| author_facet | E. B. Petrova |
| author_sort | E. B. Petrova |
| collection | DOAJ |
| description | Rationale: Velocity vector imaging is a non-invasive technique to analyze left ventricle (LV) fibers and determine the depth and area of an ischemic injury and the response to revascularization.Aim: To assess LV functional parameters in patients with non Q-wave myocardial infarction and Q-wave myocardial infarction using velocity vector imaging before and in the early postoperative period after coronary bypass grafting.Methods: We analyzed the strain (S) and strain rate (SR) of longitudinal, circular and radial fibers in 252 LV segments in 14 patients with non Q-wave myocardial infarction (group I) and in 252 segments in 14 patients with Q-wave myocardial infarction (group II) before and at day 12 after coronary bypass grafting.Results: General analysis of the fibers from all LV segments, as well as a detailed analysis of each segment was performed by velocity vector imaging. The general analysis showed the following: the function of longitudinal fibers in group I was characterized by a low S parameter (-15.2 ± 7.4%) and normal SR (-1.04 ± 0.6 s-1); in group II – a low S (-12.7 ± 6.4%) and SR (-0.80 ± 0.4 s-1). The deformation characteristics of the circular fibers were reduced in both groups (group I: S -17.1 ± 8.9%, SR 1.23 ± 0.7 s-1; group II: S -14.02 ± 8.3%, SR -0.98 ± 0.6 s-1). The radial fibers had normal S values (group I: 29.1 ± 19.9%, group II: 25.9 ± 19.7%), high SR value in group I (1.73 ± 1.0 s-1) and normal SR in group II (1.35 ± 0.6 s-1). After coronary bypass surgery, the group II demonstrated an improvement in the SR of longitudinal (-0.91 ± 0.5 s-1, p = 0.001) and circumferential (-1.11 ± 0.5 s-1, p = 0.001) fibers, whereas the S of radial fibers deteriorated (21.7 ± 8.9%, p = 0.0004). In group I, radial fiber SR became normal (1.39 ± 0.6 s-1, p = 0.0004). A detailed analysis of the LV identified 10 groups of segments depending on the changes S and/or SR. Revascularization had an impact on all segments in patients of both groups. The segments with combined changes in S and SR improved its function. The segments with changes only in S or only in SR reduce their function, which is considered as a step to harmonic contraction.Conclusion: General analysis of LV fibers shows the impact of myocardial infarction, and the detailed analysis helps to identify the impact of revascularization. |
| first_indexed | 2024-12-19T16:26:42Z |
| format | Article |
| id | doaj.art-67ec5fc555734972ac42baad89ffa379 |
| institution | Directory Open Access Journal |
| issn | 2072-0505 2587-9294 |
| language | Russian |
| last_indexed | 2024-12-19T16:26:42Z |
| publishDate | 2017-06-01 |
| publisher | MONIKI |
| record_format | Article |
| series | Alʹmanah Kliničeskoj Mediciny |
| spelling | doaj.art-67ec5fc555734972ac42baad89ffa3792022-12-21T20:14:18ZrusMONIKIAlʹmanah Kliničeskoj Mediciny2072-05052587-92942017-06-0145320821710.18786/2072-0505-2017-45-3-208-217449The function of the left ventricular myocardial segments assessed by velocity vector imaging in patients with a myocardial infarction before and after coronary artery bypassE. B. Petrova0Nizhny Novgorod State Medical AcademyRationale: Velocity vector imaging is a non-invasive technique to analyze left ventricle (LV) fibers and determine the depth and area of an ischemic injury and the response to revascularization.Aim: To assess LV functional parameters in patients with non Q-wave myocardial infarction and Q-wave myocardial infarction using velocity vector imaging before and in the early postoperative period after coronary bypass grafting.Methods: We analyzed the strain (S) and strain rate (SR) of longitudinal, circular and radial fibers in 252 LV segments in 14 patients with non Q-wave myocardial infarction (group I) and in 252 segments in 14 patients with Q-wave myocardial infarction (group II) before and at day 12 after coronary bypass grafting.Results: General analysis of the fibers from all LV segments, as well as a detailed analysis of each segment was performed by velocity vector imaging. The general analysis showed the following: the function of longitudinal fibers in group I was characterized by a low S parameter (-15.2 ± 7.4%) and normal SR (-1.04 ± 0.6 s-1); in group II – a low S (-12.7 ± 6.4%) and SR (-0.80 ± 0.4 s-1). The deformation characteristics of the circular fibers were reduced in both groups (group I: S -17.1 ± 8.9%, SR 1.23 ± 0.7 s-1; group II: S -14.02 ± 8.3%, SR -0.98 ± 0.6 s-1). The radial fibers had normal S values (group I: 29.1 ± 19.9%, group II: 25.9 ± 19.7%), high SR value in group I (1.73 ± 1.0 s-1) and normal SR in group II (1.35 ± 0.6 s-1). After coronary bypass surgery, the group II demonstrated an improvement in the SR of longitudinal (-0.91 ± 0.5 s-1, p = 0.001) and circumferential (-1.11 ± 0.5 s-1, p = 0.001) fibers, whereas the S of radial fibers deteriorated (21.7 ± 8.9%, p = 0.0004). In group I, radial fiber SR became normal (1.39 ± 0.6 s-1, p = 0.0004). A detailed analysis of the LV identified 10 groups of segments depending on the changes S and/or SR. Revascularization had an impact on all segments in patients of both groups. The segments with combined changes in S and SR improved its function. The segments with changes only in S or only in SR reduce their function, which is considered as a step to harmonic contraction.Conclusion: General analysis of LV fibers shows the impact of myocardial infarction, and the detailed analysis helps to identify the impact of revascularization.https://www.almclinmed.ru/jour/article/view/541coronary heart diseasevelocity vector imagingleft ventricular functionstrainstrain rate |
| spellingShingle | E. B. Petrova The function of the left ventricular myocardial segments assessed by velocity vector imaging in patients with a myocardial infarction before and after coronary artery bypass Alʹmanah Kliničeskoj Mediciny coronary heart disease velocity vector imaging left ventricular function strain strain rate |
| title | The function of the left ventricular myocardial segments assessed by velocity vector imaging in patients with a myocardial infarction before and after coronary artery bypass |
| title_full | The function of the left ventricular myocardial segments assessed by velocity vector imaging in patients with a myocardial infarction before and after coronary artery bypass |
| title_fullStr | The function of the left ventricular myocardial segments assessed by velocity vector imaging in patients with a myocardial infarction before and after coronary artery bypass |
| title_full_unstemmed | The function of the left ventricular myocardial segments assessed by velocity vector imaging in patients with a myocardial infarction before and after coronary artery bypass |
| title_short | The function of the left ventricular myocardial segments assessed by velocity vector imaging in patients with a myocardial infarction before and after coronary artery bypass |
| title_sort | function of the left ventricular myocardial segments assessed by velocity vector imaging in patients with a myocardial infarction before and after coronary artery bypass |
| topic | coronary heart disease velocity vector imaging left ventricular function strain strain rate |
| url | https://www.almclinmed.ru/jour/article/view/541 |
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