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  • Title: [Can the supraventricular proarrhythmic effects of class 1C antiarrhythmic drugs be prevented with the association of beta blockers?].
    Author: Brembilla-Perrot B, Houriez P, Claudon O, Yassine M, Suty-Selton C, Vancon AC, Abo el Makarem Y, Makarem E, Courtelour JM.
    Journal: Ann Cardiol Angeiol (Paris); 2000 Dec; 49(8):439-42; discussion 442-3. PubMed ID: 12555430.
    Abstract:
    Due to their electrophysiological characteristics, class 1 antiarrhythmic drugs can induce an auricular flutter with a 1/1 response. In addition to antiarrhythmic treatment, several authors have therefore considered using drugs capable of slowing auriculoventricular nodal conduction and preventing the 1/1 response. Beta-blockers have been proposed as candidate drugs. In this study, two patients were treated with an association of class 1 antiarrhythmic drugs (cibenzoline in one case, flecainide in the other) and beta-blockers. The administration of these drugs resulted in an atrial proarrhythmic response, and wide QRS tachycardia. Although both subjects had underlying heart disease, the tachycardia was relatively well tolerated in both instances. It was concluded that although beta-blockers may not suppress the risk of atrial proarrhythmia, they at least permit an improved tolerance to this complication.
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