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Relationship between electrical alternans of ST-T segment and ventricular arrythmia during episodes of ST segment elevation in patients with variant angina Tomohiro Hayakawa 1 , Yasuo Nagamoto 1 , Shinnosuke Abe 1 , Akio Kuroiwa 1 1The Second Department of Internal Medicine, University of Occupational and Environmental Health pp.1033-1039
Published Date 1985/8/15
DOI https://doi.org/10.11477/mf.1404204729

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  • Abstract
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Relationship between ventricular arrhythmias (VA) and electrical alternans of ST-T segment (STEA) during episodes of ST elevation was examined in 18 patients with variant angina. Eight of 18 patients (41%) showed STEA during episodes of ST elevation, while 10 (56%) showed no STEA. Of 93 episodes in 18 patients, STEA was observed in 19 episodes (20%), while no STEA was seen in other 74. VA occurred in 14 of 19 episodes (74%) with STEA, while VA occurred in only 21 of 74 episodes (28%) without STEA.

VA during STEA had the following characteris-tics. 1) Bigeminy and ventricular tachycardia occur-red frequently. 2) Most of the VA occurred during increasing ST elevation period (occlusive dysrhy-thmias). 3) Coupling index of single premature ventricular contraction was more longer than those of ventricular tachycardia. 4) STEA and VA were rather observed in patients without angiographically significant coronary stenosis. 5) An injury current might be regarded as a mechanism of VA during STEA because of a characteristic relation between STEA and VA.


Copyright © 1985, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1200 印刷版ISSN 0452-3458 医学書院

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