Sex-related Left Ventricle Rotational and Torsional Mechanics by Block Matching Algorithm.
Algorithm
Heart Ventricles
Motion
Rotation
Torsion
Echocardiography
Journal
Journal of biomedical physics & engineering
ISSN: 2251-7200
Titre abrégé: J Biomed Phys Eng
Pays: Iran
ID NLM: 101589641
Informations de publication
Date de publication:
Oct 2019
Oct 2019
Historique:
received:
17
08
2015
accepted:
25
09
2015
entrez:
22
11
2019
pubmed:
22
11
2019
medline:
22
11
2019
Statut:
epublish
Résumé
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. 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. 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. 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.
Sections du résumé
BACKGROUND
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
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
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
CONCLUSIONS
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.
Identifiants
pubmed: 31750268
doi: 10.31661/jbpe.v0i0.427
pii: JBPE-9-5
pmc: PMC6820028
doi:
Types de publication
Journal Article
Langues
eng
Pagination
541-550Informations de copyright
Copyright: © Shiraz University of Medical Sciences.
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