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A Case of Pure Septal Myocardial Infarction Shinichiro Yamagami 1 , Masataka Sumiyoshi 1 , Keiko Kobayashi 1 , Haruto Hujioka 1 , Hidehiko Sakurai 1 , Yasuro Nakata 1 , Hiroshi Yamaguchi 1 1Department of Cardiology, Juntendo University School of Medicine Keyword: 急性心筋梗塞 , 第一中隔枝 , 心電図 , acute myocardial infarction , first septal branch , electrocardiogram pp.309-313
Published Date 1996/3/15
DOI https://doi.org/10.11477/mf.1404901221

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  • Abstract
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A 67-year old man was admitted to our hospital with the chief complaint of prolonged chest pain. On admis-sion, an electrocardiogram showed ST elevation in V1~3 and T wave inversion in I, aVL, V5,6 Echocardiography showed hypokinesis at the base of the interventricular septum. The emergent coronary angiography demon-strated 90% narrowing in the first septal branch which suggested an infarct-related artery. The left ventriculo-graphy also showed hypokinesis in its septal wall. The 201Tl SPECT imaging taken on the 11th hospital day also revealed a defect at the base of the interventricular septum. Therefore, we made a diagnosis of a pure septal myocardial infarction. An electrocardiogram on the 11th hospital day showed decreased R wave ampli-tude in V1~2 and disappearance of pre-existing left axis deviation. We assessed the characteristics of electrocardiographic findings for predicting a pure se-ptal myocardial infarction from findings in this case as well as from the previous reports. QS pattern in V1, disappearance of septal Q wave in V5,6 appearance of intraventricular conduction disturbance, and ST eleva-tion in V1~3 at the acute phase are probably finding suggestive of a pure septal infarction. 201Tl imaging is still most essential for the definitive diagnosis of septal infarction.


Copyright © 1996, 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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