Recent advances in understanding the mechanisms of drug-induced torsades de pointes arrhythmias.


QTU prolongation and polymorphic ventricular tachycardia "torsades de pointes" have occurred in association with electrolyte abnormalities and during therapy with class IA and III antiarrhythmic drugs. Several recent studies have suggested that the arrhythmia may be due to bradycardia-dependent early afterdepolarizations and triggered activity. These drugs… (More)


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