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RISS 인기검색어
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- 저자 : Faride Roshanali (검색결과 1 건)
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Manijhe Mokhtari-Dizaji,Mosayyeb Mobasheri,Faride Roshanali 한국심초음파학회 2014 Journal of Cardiovascular Imaging (J Cardiovasc Im Vol.22 No.1
Background: In this study, the angle of the myocardium’s trajectory in three dimensions (Ф) was estimated by simultaneoususe of long-axis and short-axis views of left ventricle septum two-dimensional images. Then correlation of three-dimensionaltrajectory’s angle with the rotation angle from the long (χ) and short (θ) axis views was estimated and compared at the three levelsof base, mid and apex of the interventricular septum wall. Methods: Two-dimensional echocardiography images of long- and short-axis views of 19 healthy men were recorded andanalyzed. Using an electrocardiogram of each individual, the images of the two views were synchronized. The interventricularseptum wall motion at the three levels of base, mid and apex were estimated, using a block matching algorithm throughoutthree cardiac cycles. Considering the defined system of coordinates and the position vectors in long and short-axis views, the3-dimensional angle of the trajectory was calculated. Results: Maxima of the Ф, θ, and χ angles were extracted at 16.33 ± 3.01, 10.61 ± 3.38, and 15.11 ± 3.30 degrees at base level,22.77 ± 4.95, 7.78 ± 2.96, and 16.72 ± 2.66 degrees at mid level and 14.60 ± 5.81, 10.37 ± 5.48, and 8.79 ± 3.32 degrees at apexlevel, respectively, of the septum wall, respectively. This study shows significant correlation between the angle of 3-dimensionaltrajectory (Ф) with the angle in short axis view (θ) of the septum wall at the apex level; and also with the angle in long axis view(χ) of the septum wall at base and mid levels. Conclusion: Due to the motion of the wall of the left ventricle in three dimensions, and the non-isotropic structure ofmyofibers, the angle of 3-dimensional trajectory was estimated using the speckle tracking method of 2-dimentionalechocardiography images.
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