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Effects of a New β-receptor Blocking Agent, Carteolol, on the Patients with or without ECG Abnormalities during Antipsychotic Drug Therapy Tetsujiro Takashiba 1 , Makoto Arita 2 , Yuno shin Sasaki 1 1Department of Psychiatry, Fukuma Hospital 2Department of Physiology, Medical College of Oita Keyword: Antipsychotic drug , ECG abnormality , Sinus tachycardia , β-blockers , Carteolol pp.617-625
Published Date 1983/6/15
DOI https://doi.org/10.11477/mf.1405203600

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  • Abstract
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 We studied the effects of Carteolol, a β-blocker, on 22 patients (13 males, 9 females ; average age, 39.5 years old) with ECG abnormalities which had been induced by the treatment with major tranquilizers such as chlorpromazine, levomepromazinc, thioridazine, haloperidol, floropipamide, etc. The average daily doses used were calculated to be about 900 mg in terms of chlorpromazine. The abnormalities include sinus tachycardia, decreased amplitude of T wave, and prolongation of corrected QT interval (QTc). Carteolol was administered 5 mg b.i.d. for 7 days and the ECG just before and onthe 7th day of the treatment were compared.

 Results are as follows : 1) Carteolol significantly decreased the heart rate from 82.3+2.3 (mean+ S.E.)/min. to 64.7+1.4/rnin. 2) Carteolol shortened the QTc significantly from 0.445+0.007 sec to 0.422±0.006 sec. 3) Carteolol significantly increased the amplitude of the T wave (measured at V5 lead) in the low T group (9 cases) in which the amplitude of T wave was equal to or smaller than 1/5 of the R wave. 4) Carteolol produced no significant change in either systolic or diastolic blood pressure.

 In contrast, the drug did not produce any significant changes, in all parameters described above, in 15 patients (8 males, 7 females ; average age, 31.0 years old) who had been treated with the equivalent doses of similar major tranquilizers but without ECG abnormalities.

 We conclude that Carteolol normalizes the sinus tachycardia and the abnormalities of ventricular repolarization which have been encountered during antipsychotic drug therapy, but that the drug did not have any significant effects on the patients without ECG abnormalities.


Copyright © 1983, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-126X 印刷版ISSN 0488-1281 医学書院

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