Inventing ICD devices has been of great use for many patients needing correction of even the most life-threatening cardiac arrhythmias, although with their implantation or function come many complications. Electrical storm is characterized by occurrence of three or more ventricular tachyarrhythmias which require electrotherapy within 24 hours. It occurs in about 10% to 20% of patients with ICD used for secondary prevention of sudden cardiac death while when implanted for primary prevention its incidence is about 4%. It is linked with a high mortality risk and increased rate of hospitalization but also could be a crucial symptom of lead-dependent infective endocarditis (LDIE). Management includes ablation, pharmacotherapy and reprogramming of the ICD.