Polymorphic VT, Torsades de pointes, and unusual SVT (SVT with wide complexes due to aberrant conduction) may be reversible, e.g. magnesium for Torsades, but do not delay
[nhcps.com]
Catecholaminergic ventricular tachycardia is also induced by emotion, exercise, or isoprenaline and may degenerate in atypical ventricular tachycardia (torsade de pointes)
[af-ablation.org]