Sex-related left ventricle rotational and torsional mechanics by block matching algorithm

Bahreini Toosi, M. H. and Zarghani, H. and Poorzand, H. and Na-Seri, S. and Eshraghi, A. and Golabpour, A. (2019) Sex-related left ventricle rotational and torsional mechanics by block matching algorithm. Journal of Biomedical Physics and Engineering, 9 (5). pp. 541-550.

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Background: The aim of the present study was to evaluate how left ventricular twist and torsion are associated with sex between sex groups of the same age. Materials and Methods: In this analytical study, twenty one healthy subjects were scanned in left ventricle basal and apical short axis views to run the block matching algorithm; instantaneous changes in the base and apex rotation angels were estimated by this algorithm and then instantaneous changes of the twist and torsion were calculated over the cardiac cycle. Results: The rotation amount between the consecutive frames in basal and apical levels was extracted from short axis views by tracking the speckle pattern of images. The maximum basal rotation angle for men and women were-6.94°±1.84 and 9.85°±2.36 degrees (p-value = 0.054), respectively. Apex maximum rotation for men was-8.89°±2.04 and for women was 12.18°±2.33 (p-value < 0.05). The peak of twist angle for men and women was 16.78 ± 1.83 and 20.95± 2.09 degrees (p-value < 0.05), respectively. In men and women groups, the peak of calculated torsion angle was 5.49°±1.04 and 7.12± 1.38 degrees (p-value < 0.05), respectively. Conclusion: The conclusion is that although torsion is an efficient parameter for left ventricle function assessment, because it can take in account the heart diameter and length, statistic evaluation of the results shows that among men and women LV mechanical parameters are significantly different. This study was mainly ascribed to the dependency of the torsion and twist on patient sex. © 2019, Shiraz University of Medical Sciences. All rights reserved.

Item Type: Article
Additional Information: Export Date: 16 February 2020 Correspondence Address: Zarghani, H.; Medical Physics Department, Faculty of Medicine, Mashhad University of Medical SciencesIran; email:
Uncontrolled Keywords: Algorithm Echocardiography Heart Ventricles Motion Rotation Torsion acceleration adult analytic method Article block matching algorithm body mass circling behavior clinical article female finite element analysis heart cycle heart left ventricle function human male mechanical torsion sexual behavior two dimensional echocardiography
Subjects: QT physiology
Divisions: Mashhad University of Medical Sciences
Depositing User: mr lib1 lib1
Date Deposited: 21 Jun 2020 05:02
Last Modified: 21 Jun 2020 05:02

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