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Beneficial effects of intravenous diltiazem on supraventricular tachyarrhythmias Masahito Naito 1,2 , Akio Ijiri 1,2 , Isao Mitani 1,2 , Shunichi Fukuhara 1,2 , Masako Toyama 1,2 , Shinichiro Ishikawa 1,2 , Hideki Nagoshi 1,2 , Masasada Honda 1,2 1Department of Cardiology, The Second Tokyo National Hospital pp.655-659
Published Date 1987/6/15
DOI https://doi.org/10.11477/mf.1404205077
  • Abstract
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Effects of intravenous diltiazem hydrochloride was evaluated in 50 patients with supraventricular tach-yarrhythmias including 10 patients with paroxysmal supraventricular tachycardia, 25 patients with chronic atrial fibrillation and 15 patients with transient atrial fibrillation or flutter. Diltiazem hydrochloride was administered intravenously over 10 seconds, 20~30 mg initially and additional 10~20 mg if necessary. No patients had received digitalis and/or betabloc-kers in the previous 24 hours. All patients with artial fibrillation or flutter had ventricular rate above 130 beats/min at time of the study.

All patients with paroxysmal supraventricular tachycardia converted to normal sinus rhythm 30 seconds to 1 minute after the administration of dil-tiazem hydrochloride, and ventricular rate fell below 100 beats/min in all of patients with atrial fibrilla-tion or flutter after a mean of 1.8 minutes. This heart rate reduction persisted for 1 to 2 hours follo-wing an intravenous administration of the drug. The systolic blood pressure decreased minimally and no adverse effects were seen in none of these cases following diltiazem administration. Diltiazem hyd-rochloride had no significant effects on either the QRS or QTc intervals. No patients developed symp-toms after diltiazem administration. Intravenous dii-tiazem hydrochloride was safe in patients who had heart failure related to the occurrence of atrial fibril-lation and was also well tolerated by 5 patients who had an acute myocardial infarction.

Thus, intravenous diltiazem hydrochloride is very potent, highly effective, and well tolerated and may be the drug of choice for the acute management of patients with supraventricular tachyarrhythmias.


Copyright © 1987, 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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