The Function of the Myocardium of the Left Ventricle Before and after Coronary Artery Bypass using Velocity Vector Imaging
Abstract
The aim: to assess functional parameters of the left ventricle (LV) in patients with coronary heart disease (CHD) using Velocity Vector Imaging before and early after surgical revascularisation. Materials and methods. The analysis of the strain (S) and strain rate (SR) of longitudinal, circular and radial fibers in 216 segments of the left ventricle before and on the 12th day after surgery. Results. The impact of CHD on the LV segments is expressed not only in the reduction or compensatory increase S and SR, but also a variety of options associated with the change mainly the strain or strain rate. Along with this marked change in the direction of motion of the LV myocardial fibers. After revascularization, the normalization of the deformation properties of the longitudinal and radial fibers occurred in 51 (24%) and 139 (64%) segments, respectively. Significant improvement in the function of circular fibers in the early stages is not registered. Low indices S and SR longitudinal, radial and circular fibers registered in 55 (25%), 15 (7%) and 167 (77%) LV segments. Conclusion. All segments with a change of direction of motion after revascularization regained its function, however, the deformation indicators remained low.
About the Author
Ekaterina Borisovna Petrova
Nizhny Novgorod State Medical Academy
Russian Federation
Russian Federation
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Review
For citations:
Petrova E.B. The Function of the Myocardium of the Left Ventricle Before and after Coronary Artery Bypass using Velocity Vector Imaging. Medical Visualization. 2015;(3):35-42. (In Russ.)
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