Understanding electrical storms in heart rhythm disorders

An “electrical storm” is a situation in which multiple shocks from an ICD are delivered in a short period of time (more than 3 shocks in 24 hours). This situation corresponds to an urgent situation in which your condition has changed and arrhythmias become very frequent. It justifies rapid treatment to avoid the repetition of arrhythmias and therefore shocks. In general, if you receive more than one shock in the course of 24 hours, you must very quickly contact your doctor or your implantation center because this can be the onset of an electrical storm. An electrical storm requires hospitalization and, often, intravenous treatment or even general anesthesia to stabilize the situation.

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FREQUENTLY ASKED QUESTIONS

What causes an electrical storm in the heart?

Electrical storms are recurring episodes (more than 3 within 24h) of sustained ventricular arrhythmias or ICD shocks. They can be caused by acute ischemia (myocardial infarction), electrolyte imbalances or linked to an underlying disease, such as an aquired or inherited cardiomyopathy.

How is an electrical storm treated?

Treatment may include antiarrhythmic medications, ICD programming, catheter ablation, or addressing underlying conditions like electrolyte disturbances.

Is an electrical storm life-threatening?

Yes, an electrical storm is life-threatening and requires immediate medical support to prevent cardiac arrest and sudden death.