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  • Title: Torsade des pointes and aprindine.
    Author: Sideris DA, Kontoyannis DA, Moulopoulos SD.
    Journal: Int J Cardiol; 1985 Apr; 7(4):413-6. PubMed ID: 2580805.
    Abstract:
    Aprindine was given orally to an 88-year-old patient with atrial fibrillation and ventricular premature depolarizations. The premature beats disappeared and sinus rhythm was restored on the third day of treatment. While on aprindine the QT interval was prolonged and the U wave became very prominent. The aprindine was stopped but 36 hr following the last oral dose, ventricular arrhythmia appeared with the characters of torsade des pointes. Three such episodes occurred within 24 hr. It is suggested that aprindine both eliminated the premature depolarizations and rendered the myocardium vulnerable by prolonging the QT interval. On discontinuing the medicament the premature beats reappeared while the myocardium was still vulnerable, so that torsade des pointes resulted.
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