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A Case of Sick Sinus Syndrome with Polymorphic Ventricular Tachycardia and Marked Prolongation of QT Interval after Cerebral Infarction Masayuki Yasuda 1 , Kenichi Kuremoto 1 , Takeshi Kurata 1 , Hiroshi Mokuno 1 , Hisashi Yokoi 1 , Masataka Sumiyoshi 1 , Yuji Nakazato 1 , Hiroyuki Daida 1 , Hidehiko Sakurai 1 , Yasuro Nakata 1 , Hiroshi Yamaguchi 1 1Juntendo University School of Medicine, Department of Cardiology Keyword: 多形性心室頻拍 , QT間隔延長 , 脳梗塞 , polymorphic ventricular tachycardia , prolongation of QT interval , cerebral infarction pp.1135-1139
Published Date 1998/11/15
DOI https://doi.org/10.11477/mf.1404901798

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  • Abstract
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A 55-year-old man was admitted to our hospital because of cerebral infarction due to occlusion of the right middle cerebral artery. During the course of his hospitalization, the patient developed atrial flutter (AF) with 2 : 1 atrioventricular conduction, which was treat-ed by intravenous digoxin. Although sinus rhythm was restored after the treatment, sinus arrest with a jun-ctional escape rhythm of 30 beats/min was noted. Marked prolongation of the QT interval (0.94 sec) and giant negative T waves in V4-6 following polymorphic ventricular tachycardia (VT) were also recognized. VT was successfully converted to sinus rhythm by a car-dioversion of 200 joule. The QT interval gradually recovered to 0.50 sec during temporary ventricular pacing (70 beats/min), and VT was suppressed. How-ever, the patient sufferred from repetitive paroxysmal AF and sinus arrest and electrophysiological study in-dicated prolonged sinus node recovery time, he was implanted with a cardiac pacemaker under the diagno-sis of sick sinus syndrome. In this case, prolongation ofthe QT interval due to cerebral infarction, which was promoted by bradycardia, might have been the cause of the induced polymorphic VT.


Copyright © 1998, 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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