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Comparative effects of three calcium antagonists (nifedipine, verapamil and diltiazem) on hemodynamics in recent myocardial infarction Makoto Sakai 1 , Keiji Ueda 1 , Kenichi Nakahara 1 , Hidetsugu Tsuchimochi 1 , Satoru Mutsushita 1 , Kizuku Kuramoto 1 , Mototaka Murakami 1 1Department of Cardiology, Tokyo Metropolitan Geriatric Hospital pp.159-164
Published Date 1985/2/15
DOI https://doi.org/10.11477/mf.1404204595

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  • Abstract
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Hemodynamic effects of diltiazem and verapamil were compared with those of nifedipine in 11 patients with recent myocardial infarction by crossover method. Right heart catheterization and echocardiography were performed in 5 patients (Group A) with an oral dose of 10 mg of nifedipine followed by an intravenous injection of 10 mg of diltiazem, and in 6 patients (Gruop B) with nif-edipine followed by an intravenous injection of 10 mg of verapamil.

After the administration of nifedipine, systemic vascular resistance (SVR) decreased by 13.4%and cardiac output (CO) increased by 11.0%without the change of heart rate (HR). Ejectionfraction (EF), which was measured by echocardio-graphy, tended to increase. This vasodilator effect (JSVR) was proportional to SVR in control state and accompanied with an increase of CO.

Vasodilator effect of three calcium antagonists was not different significantly (ΔJSVR : verapamil -10.0±2.9%, nifedipine -13.4±3.0%, diltiazem -20.0±6.4%). But EF tended to decrease with verapamil and diltiazem, and HR was unchanged following the administration of both drugs. Vera-pamil and diltiazem increased pulmonary artery pressure and suppressed atrioventricular (AV) nodal conduction with a prolongation of P-R interval, but nifedipine did not show these changes.

Therefore, it is concluded that among three calcium antagonists nifedipine can be used as a vasodilator with the least untoward effects on AV conduction and cardiac contractility in patients with recent myocardial infarction.


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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