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The effect of 7-oxo-prostacyclin (7-oxo-PGI2) ouabain-induced arrhyhmias in anesthetized guinea pigs. Ventricular arrhythmias (ventricular extrasystoles [Extrasyst], tachycardiac episodes [Ventr Tachyc], ventricular fibrillation [Ventr Fibrill] and cardiac arrest [Card arrest]) were evaluated in the controls and in guinea-pigs treated with 7-oxo-PGI2 24 h, 48 h, 72 h and 96 h before the induction of ouabain arrhythmias. *Significantly different from control values at P<0.01
