Abstract
Background
In this study, three-dimensional torsion angle of myocardium was extracted by two-dimensional images of the left ventricle at three levels of base, mid, and apex of interventricular septum wall.
Methods
Two-dimensional echocardiography images of long- and short-axis views of healthy men were synchronized using an electrocardiogram of each individual and processed. Interventricular septum wall motion at three levels of base, mid, and apex were measured using a motion-detection algorithm throughout three cardiac cycles. Considering position vectors in long and short-axis views, the three-dimensional torsion angle is extracted throughout the cardiac cycle.
Results
The average and standard deviation of ΦM during three cardiac cycles for interventricular septal wall in healthy individuals in this study are estimated as 16.3 ± 3.0° at base level, 22.8 ± 5.0° at mid level, and 14.6 ± 5.8° at apex level of septum wall, respectively.
Conclusions
This angle suggested for examination of regional and global biomechanical behavior of myocardium in different pathologic conditions.
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Acknowledgments
This study was approved and funded by Faculty of Medical Sciences, Tarbiat Modares University.
Conflict of interest
Mosayyeb Mobasheri, Manijhe Mokhtari-Dizaji, and Faride Roshanali declare that they have no conflicts of interest to declare.
Human rights statements and informed consent
All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (the medical ethics committee of Tarbiat Modares University, Iran) and with the Helsinki Declaration of 1975, as revised in 2000. Informed consent was obtained from all patients included in the study.
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Mobasheri, M., Mokhtari-Dizaji, M. & Roshanali, F. Measurement of ventricular three-dimensional torsion. J Echocardiogr 13, 59–65 (2015). https://doi.org/10.1007/s12574-015-0241-9
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DOI: https://doi.org/10.1007/s12574-015-0241-9