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  Vol. 42 No. 11, November 1985 TABLE OF CONTENTS
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Cardiac Side Effects of Phenytoin and Carbamazepine

A Dose-Related Phenomenon?

Luca Durelli, MD; Roberto Mutani, MD; Gian Pietro Sechi, MD; Francesco Monaco, MD; Nicola Glorioso, MD; Graziano Gusmaroli, MD

Arch Neurol. 1985;42(11):1067-1068.


Abstract

• Three patients with dystrophia myotonica and echocardiographic signs of subclinical cardiopathy had cardiac side effects during oral treatment with phenytoin sodium or carbamazepine. These side effects were dose related: ventricular tachycardia appeared at a toxic serum phenytoin level in one patient and disappeared as the concentration fell within the therapeutic range, and atrioventricular block grade 1 developed in two patients at low serum carbamazepine levels, its severity increasing with the drug level. Given the risk of dangerous side effects, cardiac status needs to be carefully assessed before administration of phenytoin or carbamazepine in the treatment of dystrophia myotonica.



Author Affiliations

From the Clinica Neurologica (Drs Durelli, Mutani, Sechi, and Monaco) and the Istituto di Patologia Medica II (Drs Durelli, Mutani, Monaco, and Glorioso), Università di Sassari (Italy); and the Clinica Neurologica I, Università di Torino (Italy) (Dr Gusmaroli). Dr Durelli is now with the Università di Torino.


Footnotes

Accepted for publication Jan 3, 1985.

Reprint requests to Clinica Neurologica, Facoltà di Medicina, Università di Torino, Via Cherasco 15, 1-10126 Torino, Italy (Dr Durelli).



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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES

Carbamazepine-lnduced Cardiac Dysfunction: Characterization of Two Distinct Clinical Syndromes
Kasarskis et al.
Arch Intern Med 1992;152:186-191.
ABSTRACT  





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