Amiodarone (Class IIb) and procainamide (Class IIb) are
recommended ahead of lidocaine and adenosine for the    initial
treatment of hemodynamically stable wide-complex    tachycardia,
especially in patients with Compromised   cardiac function.
 Amiodarone and sotalol (a drug that awaits Food and  Drug
Administration approval for US use) are new agents  recommended as
Class IIa agents for the treatment of stable  monomorphic and
polymorphic ventricular tachycardia   (VT).
Magnesium has shown effectiveness only in the treatment of known
hypomagnesemic states    and torsades de pointes, for which it still has
a Class IIb recommendation.
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