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  • Title: Flecainide acetate in the treatment of supraventricular tachycardias: value of programmed electrical stimulation for long-term prognosis.
    Author: van Wijk LM, Crijns HJ, van Gilst WH, Wesseling H, Lie KI.
    Journal: Am Heart J; 1989 Feb; 117(2):365-9. PubMed ID: 2492738.
    Abstract:
    Twenty patients with recurrent symptomatic supraventricular tachycardia were studied to estimate the efficacy of flecainide in the long-term treatment of these arrhythmias and to evaluate the prognostic value of programmed electrophysiologic stimulation. All patients had their arrhythmia inducible at baseline evaluation. Nine patients had a Wolff-Parkinson-White (WPW) syndrome, five had a concealed bypass tract, and two had dual atrioventricular (AV) nodal pathways. In the remaining patients there was an intraatrial reentry circuit. Previous medication was no to five antiarrhythmic drugs (mean 2.4 drugs). At baseline, a circus movement tachycardia was induced in 12, AV nodal tachycardia was induced in two, atrial tachycardia was induced in three, atrial fibrillation was induced in five, and a flutter was induced in two patients. After flecainide, 2 mg/kg intravenously in 10 minutes, six patients no longer had their arrhythmia inducible. In the WPW patients, atrial fibrillation was no more inducible. In 65% of the patients there was no recurrence during a follow-up period of 11 +/- 10 months. None of the six patients who no longer had their arrhythmia inducible had a recurrence of the tachycardia over a period of up to 3 years. Seven of the other 14 patients (who still had their arrhythmia inducible) had a recurrence of the tachycardia. Positive and negative predictive values are 50% and 100%, respectively. We conclude that flecainide prevents recurrences of supraventricular tachycardias in 65% of patients with inducible supraventricular tachycardias during a mean follow-up of 11 months. Programmed electrical stimulation has a high negative predictive value in this setting. Flecainide is especially effective in preventing atrial fibrillation in patients with WPW syndrome.
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