Form of polymorphic VTach
Gradual change in the amplitude of QRS complexes and twisting around isoelectric line
Associated with congenital or acquired prolonged QT
Gradual change in the amplitude of QRS complexes and twisting around isoelectric line<unk>  mnemonic:
Phenothiazines
Other medications (ie TCAs)
Intracranial bleed
No known cause (idiopathic)
Type I antiarrhythmics (quinidine, procainamide, disopyramide)
Electrolyte abnormalities (hypoK & hypoMg)
Syndrome of Prolonged QT (aka Long QT Syndrome)
Other causes:
Organophosphate toxicity
Hydrocarbon toxicity
Chloral hydrate toxicity
Hypothermia
Organophosphate toxicity
Hydrocarbon toxicity
Chloral hydrate toxicity
Hypothermia
Torsades de pointes
Drug induced
Brugada syndrome
Congenital long QT
Takotsubo cardiomyopathy
Hypocalcemia
Unstable angina
Hypomagnesemia