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Paper Abstract and Keywords
Presentation 2017-10-05 14:55
Ultrasonic measurement of propagation of myocardial contraction response in interventricular septum
Itsuki Kobayashi, Mototaka Arakawa, Hiroshi Kanai (Tohoku Univ.) US2017-60
Abstract (in Japanese) (See Japanese page) 
(in English) It is known that ischemia occurred in the cardiac muscle introduces abnormality in the contraction function of the myocardium in the ischemic region. Therefore, if we can measure myocardial contractile movement caused by electrical excitation, there is a possibility of early detection of cardiomyocyte abnormalities due to disease. However, the mechanism of the transition process in myocardial contraction has not been fully elucidated. In the present study, we analyzed the two-dimensional motion in the heart wall using the speckle tracking method for the ultrasonic RF signals measured at the high frame rate and evaluated the contraction characteristic of the myocardium. We estimated the two dimensional velocity of the interventricular septum (IVS) at the time near the R-wave of the electrocardiogram (ECG) and observed the motion transiting to the contraction. Furthermore, the state of propagation of myocardial contraction response was evaluated by estimating the temporal change of the spatial distribution in the velocity waveforms and their phase components.
Keyword (in Japanese) (See Japanese page) 
(in English) Ultrasound / Heart wall / High frame rate / Speckle tracking / Propagation of myocardial contraction response / / /  
Reference Info. IEICE Tech. Rep., vol. 117, no. 227, US2017-60, pp. 21-26, Oct. 2017.
Paper # US2017-60 
Date of Issue 2017-09-28 (US) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (No. 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee US  
Conference Date 2017-10-05 - 2017-10-05 
Place (in Japanese) (See Japanese page) 
Place (in English)  
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Paper Information
Registration To US 
Conference Code 2017-10-US 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Ultrasonic measurement of propagation of myocardial contraction response in interventricular septum 
Sub Title (in English)  
Keyword(1) Ultrasound  
Keyword(2) Heart wall  
Keyword(3) High frame rate  
Keyword(4) Speckle tracking  
Keyword(5) Propagation of myocardial contraction response  
1st Author's Name Itsuki Kobayashi  
1st Author's Affiliation Tohoku University (Tohoku Univ.)
2nd Author's Name Mototaka Arakawa  
2nd Author's Affiliation Tohoku University (Tohoku Univ.)
3rd Author's Name Hiroshi Kanai  
3rd Author's Affiliation Tohoku University (Tohoku Univ.)
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Date Time 2017-10-05 14:55:00 
Presentation Time 25 
Registration for US 
Paper # IEICE-US2017-60 
Volume (vol) IEICE-117 
Number (no) no.227 
Page pp.21-26 
#Pages IEICE-6 
Date of Issue IEICE-US-2017-09-28 

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