If amiodarone or procainamide does not terminate the rapid rhythm, why should adenosine be considered?
A) Torsades may be the underlying rhythm
B) adenosine inhibits the outward potassium current so it prolongs the QT duration
C) a wide complex tachycardia could be SVT with aberrant ventricular conduction
D) adenosine inhibits sodium channels, which slows conduction in the ventricles and prolongs QT duration