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  • Title: [Treatment of recurrent supraventricular tachyarrhythmias with flecainide or a flecainide and amiodarone combination].
    Author: Purcaro A, Capestro F, Ciampani N, Fratadocchi GB, Mazzanti M, Costantini C, Molini E.
    Journal: G Ital Cardiol; 1987 Aug; 17(8):690-8. PubMed ID: 3121426.
    Abstract:
    The acute electrophysiologic effects and therapeutic efficacy of intravenous and oral flecainide were assessed in 18 patients with recurrent supraventricular tachyarrhythmias, resistant to conventional antiarrhythmic agents. They were 22 to 76 years old (mean 50). Twelve patients underwent electrophysiologic study for the investigation of tachyarrhythmias. Of the whole four patients had functional longitudinal AH dissociation (dual AV pathways). These patients had provocable intra-AV nodal reentrant tachycardia (Group I). Six patients had a direct accessory AV pathway, that showed bidirectional conduction in 5 and retrograde conduction alone in 1 (Group II). These patients had provocable atrioventricular reentrant tachycardia using the accessory pathway as the retrograde limb of the tachycardia circuit. Two patients suffered from automatic supraventricular tachycardia (Group III). Group IV included patients with paroxysmal atrial flutter or fibrillation. The patients of this group did not discontinue chronic treatment with amiodarone. After baseline electrophysiologic evaluation, intravenous flecainide (2 mg/Kg body weight over 5 minutes) was given to patients of I and II group during induced reentrant tachycardia. Flecainide was administered to other patients during spontaneous episodes of tachyarrhythmias. Flecainide resulted in tachycardia termination in all patients of group I and in 4 patients of group II (66%). Tachycardia termination was due to block in the retrograde limb of the circuit. Before termination tachycardia cycle length increased significantly, mainly as the result of an increase in ventriculo-atrial conduction time. After intravenous flecainide therapy, reentrant SVT was non inducible in the patients of group I and in 4 patients of group II. Flecainide was successful in the acute termination of 100% of automatic supraventricular tachycardia and 75% of fibrillation. The patients with atrial flutter developed a faster ventricular rate.(ABSTRACT TRUNCATED AT 250 WORDS)
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