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 Φ(M) 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.
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 Φ(M) 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.
Authors: F Torrent-Guasp; M Ballester; G D Buckberg; F Carreras; A Flotats; I Carrió; A Ferreira; L E Samuels; J Narula Journal: J Thorac Cardiovasc Surg Date: 2001-08 Impact factor: 5.209
Authors: Manuel D Cerqueira; Neil J Weissman; Vasken Dilsizian; Alice K Jacobs; Sanjiv Kaul; Waren K Laskey; Dudley J Pennell; John A Rumberger; Thomas Ryan; Mario S Verani Journal: Int J Cardiovasc Imaging Date: 2002-02 Impact factor: 2.357
Authors: Yuichi Notomi; Peter Lysyansky; Randolph M Setser; Takahiro Shiota; Zoran B Popović; Maureen G Martin-Miklovic; Joan A Weaver; Stephanie J Oryszak; Neil L Greenberg; Richard D White; James D Thomas Journal: J Am Coll Cardiol Date: 2005-06-21 Impact factor: 24.094
Authors: Partho P Sengupta; Vijay K Krishnamoorthy; Josef Korinek; Jagat Narula; Mani A Vannan; Steven J Lester; Jamil A Tajik; James B Seward; Bijoy K Khandheria; Marek Belohlavek Journal: J Am Soc Echocardiogr Date: 2007-05 Impact factor: 5.251