[Etiologies of electric storm].

The electrical storm is defined as recurrent ventricular tachycardia or fibrillation leading to cardiac shock occurring two or more times within 24 hours and usually requiring cardioversion or defibrillation. Recent advances in our understanding of this severe arrhythmia and its pharmacological treatment have improved the prognosis of these patients. The authors review several clinical syndromes of the electrical storm and the treatment of each.