The Experts below are selected from a list of 78 Experts worldwide ranked by ideXlab platform
Seyed Mostafa Tayebisany - One of the best experts on this subject based on the ideXlab platform.
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A comparison of posterior wall thickness, interventricular septum thickness and relative wall thickness of left Ventricle of Heart in male athletes (badminton and karate) and non-athletes
British Journal of Sports Medicine, 2010Co-Authors: Hasan Abdi, Alireza Hajighasemi, Seyed Mostafa TayebisanyAbstract:The aim of this study was to study a comparison of posterior wall thickness, interventricular septum thickness and relative wall thickness of left Ventricle of Heart in male athlete and non–athlete, and to investigate the effect of selected submaximal tests for estimating of VO 2 max (because of frequently use of them), as submaximal short duration activities, on ST segment changes in active young men. For this purpose, 20 healthy men were randomly selected from the athletics at Shahrood city. They had at least 3 years experience in regular physical activity and sport participation. Measurements were made during four consecutive days (every day, 10:00). At the 1st day, age (23.4±1.8 years), height (173.2±3.5 cm), weight (68.7±4.1 kg) and pretest ECGs were recorded. Subjects performed PWC 195 test, Katch-McArdle step test and Astrand ergometer test at 2nd, 3rd and 4th days, randomly. Immediately after the tests, post-test ECGs were recorded. Data were analysed using paired-sample t test (for comparison between pretest and each of post-tests) and one-way analysis of variance (for comparison among post-tests). Statistical significances were accepted at p 195 test 0.024±0.012, Katch-McArdle step test 0.024±0.014, Astrand ergometer test 0.024±0.007 mv(. Our findings suggest that submaximal short duration activities (and tests) statistically reduce the voltage of ST segment, but, these depressions are not pathologically significant, because they were less than 0.1 mv.
Hasan Abdi - One of the best experts on this subject based on the ideXlab platform.
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A comparison of posterior wall thickness, interventricular septum thickness and relative wall thickness of left Ventricle of Heart in male athletes (badminton and karate) and non-athletes
British Journal of Sports Medicine, 2010Co-Authors: Hasan Abdi, Alireza Hajighasemi, Seyed Mostafa TayebisanyAbstract:The aim of this study was to study a comparison of posterior wall thickness, interventricular septum thickness and relative wall thickness of left Ventricle of Heart in male athlete and non–athlete, and to investigate the effect of selected submaximal tests for estimating of VO 2 max (because of frequently use of them), as submaximal short duration activities, on ST segment changes in active young men. For this purpose, 20 healthy men were randomly selected from the athletics at Shahrood city. They had at least 3 years experience in regular physical activity and sport participation. Measurements were made during four consecutive days (every day, 10:00). At the 1st day, age (23.4±1.8 years), height (173.2±3.5 cm), weight (68.7±4.1 kg) and pretest ECGs were recorded. Subjects performed PWC 195 test, Katch-McArdle step test and Astrand ergometer test at 2nd, 3rd and 4th days, randomly. Immediately after the tests, post-test ECGs were recorded. Data were analysed using paired-sample t test (for comparison between pretest and each of post-tests) and one-way analysis of variance (for comparison among post-tests). Statistical significances were accepted at p 195 test 0.024±0.012, Katch-McArdle step test 0.024±0.014, Astrand ergometer test 0.024±0.007 mv(. Our findings suggest that submaximal short duration activities (and tests) statistically reduce the voltage of ST segment, but, these depressions are not pathologically significant, because they were less than 0.1 mv.
Mersedeh Karvandi - One of the best experts on this subject based on the ideXlab platform.
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Mathematical modeling applied to the left Ventricle of Heart
arXiv: Medical Physics, 2014Co-Authors: Saeed Ranjbar, Mersedeh KarvandiAbstract:Background: How can mathematics help us to understand the mechanism of the cardiac motion? The best known approach is to take a mathematical model of the fibered structure, insert it into a more-or-less complex model of cardiac architecture, and then study the resulting fibers of activation that propagate through the myocardium. In our paper, we have attempted to create a novel software capable of demonstrate left ventricular (LV) model in normal Hearts. Method: Echocardiography was performed on 70 healthy volunteers. Data evaluated included: velocity (radial, longitudinal, rotational and vector point), displacement (longitudinal and rotational), strain rate (longitudinal and circumferential) and strain (radial, longitudinal and circumferential) of all 16 LV myocardial segments. Using these data, force vectors of myocardial samples were estimated by MATLAB software, interfaced in the echocardiograph system. Dynamic orientation contraction (through the cardiac cycle) of every individual myocardial fiber could be created by adding together the sequential steps of the multiple fragmented sectors of that fiber. This way we attempted to mechanically illustrate the global LV model. Result: Our study shows that in normal cases myocardial fibers initiate from the posterior basal region of the Heart, continues through the LV free wall, reaches the septum, loops around the apex, ascends, and ends at the superior-anterior edge of LV. Conclusion: We were able to define the whole LV myocardial model mathematically, by MATLAB software in normal subjects. This will enable physicians to diagnose and follow up many cardiac diseases when this software is interfaced within echocardiographic machines.
Shigeaki Ishizaka - One of the best experts on this subject based on the ideXlab platform.
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Isolation and characterization of murine hepatocytes following collagenase infusion into left Ventricle of Heart.
Journal of bioscience and bioengineering, 2010Co-Authors: Yukiteru Ouji, Masahide Yoshikawa, Kei Moriya, Mariko Nishiofuku, Noriko Ouji-sageshima, Ryosuke Matsuda, Fumihiko Nishimura, Shigeaki IshizakaAbstract:A method for obtaining mouse hepatocytes by infusing collagenase solution into the left Ventricle was established. This technique was shown to be equivalent to the intra-portal infusion method and more practical, especially in postnatal mice with a small body size.
Alireza Hajighasemi - One of the best experts on this subject based on the ideXlab platform.
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A comparison of posterior wall thickness, interventricular septum thickness and relative wall thickness of left Ventricle of Heart in male athletes (badminton and karate) and non-athletes
British Journal of Sports Medicine, 2010Co-Authors: Hasan Abdi, Alireza Hajighasemi, Seyed Mostafa TayebisanyAbstract:The aim of this study was to study a comparison of posterior wall thickness, interventricular septum thickness and relative wall thickness of left Ventricle of Heart in male athlete and non–athlete, and to investigate the effect of selected submaximal tests for estimating of VO 2 max (because of frequently use of them), as submaximal short duration activities, on ST segment changes in active young men. For this purpose, 20 healthy men were randomly selected from the athletics at Shahrood city. They had at least 3 years experience in regular physical activity and sport participation. Measurements were made during four consecutive days (every day, 10:00). At the 1st day, age (23.4±1.8 years), height (173.2±3.5 cm), weight (68.7±4.1 kg) and pretest ECGs were recorded. Subjects performed PWC 195 test, Katch-McArdle step test and Astrand ergometer test at 2nd, 3rd and 4th days, randomly. Immediately after the tests, post-test ECGs were recorded. Data were analysed using paired-sample t test (for comparison between pretest and each of post-tests) and one-way analysis of variance (for comparison among post-tests). Statistical significances were accepted at p 195 test 0.024±0.012, Katch-McArdle step test 0.024±0.014, Astrand ergometer test 0.024±0.007 mv(. Our findings suggest that submaximal short duration activities (and tests) statistically reduce the voltage of ST segment, but, these depressions are not pathologically significant, because they were less than 0.1 mv.
