Paper Abstract and Keywords |
Presentation |
2010-08-10 13:45
Visualization of propagation of myocardial response to electric excitation in human hearts by ultrasonic measurement of vibrations Hiroshi Kanai (Tohoku Univ.) EA2010-55 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
Electrocardiography is an invaluable clinical tool for diagnosis of a broad range of cardiac conditions, and clinical imaging tools. The aim of the present study is to visualize subtle features of the initial myocardial response to the propagation of the electrochemical depolarization waves, which corresponds to the beginning of the heart contraction. The three-dimensional propagation of the proximate response to the electrical excitation caused by cell polarization in the human heart wall was visualized by a novel ultrasonic-based measurement method noninvasively for the first time. Visualization demonstrated that at the time of the Q-wave of the electrocardiogram, pulsive vibration is generated at the center of the interventricular septum, and progresses to the entire left ventricle at a propagation speed of about 0.8 m/s. The subtle dynamic response of the myocardium to the arrival of electrical excitation visualized by this approach with a high temporal resolution of 2 ms shows great potential for noninvasive assessment of heart wall damage due to heart failure and desynchronization due to fibrillation. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
Action potentials / depolarization / echocardiography / imaging / ultrasonics / / / |
Reference Info. |
IEICE Tech. Rep., vol. 110, no. 171, EA2010-55, pp. 69-73, Aug. 2010. |
Paper # |
EA2010-55 |
Date of Issue |
2010-08-02 (EA) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
Copyright and reproduction |
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. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) |
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EA2010-55 |
Conference Information |
Committee |
EA |
Conference Date |
2010-08-09 - 2010-08-10 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
Tohoku Univ. |
Topics (in Japanese) |
(See Japanese page) |
Topics (in English) |
Acoustic Signal Processing, Psychological and Physiological Acoustics, and Related Topics |
Paper Information |
Registration To |
EA |
Conference Code |
2010-08-EA |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
Visualization of propagation of myocardial response to electric excitation in human hearts by ultrasonic measurement of vibrations |
Sub Title (in English) |
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Action potentials |
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depolarization |
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echocardiography |
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imaging |
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ultrasonics |
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Hiroshi Kanai |
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Tohoku University (Tohoku Univ.) |
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Speaker |
Author-1 |
Date Time |
2010-08-10 13:45:00 |
Presentation Time |
30 minutes |
Registration for |
EA |
Paper # |
EA2010-55 |
Volume (vol) |
vol.110 |
Number (no) |
no.171 |
Page |
pp.69-73 |
#Pages |
5 |
Date of Issue |
2010-08-02 (EA) |
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