Contemporary Management of Electrical Storm

Area of Science:

• Cardiology
• Electrophysiology
• Critical Care Medicine

Background:

• Cardiac electrical storm (ES) is defined as recurrent ventricular arrhythmias, posing a significant mortality risk and often preceding heart failure.
• It is associated with psychological distress from implanted cardioverter-defibrillator (ICD) shocks and increased healthcare resource utilization.
• Up to 30% of ICD recipients may experience ES, with higher risk in secondary prevention cases; recurrence is common.

Purpose of the Study:

• To review the incidence, mechanisms, and contemporary multi-modality treatment strategies for cardiac electrical storm.
• To highlight the efficacy of catheter ablation and other emergent interventions for managing ES.
• To discuss ES management in specific conditions like channelopathies and Brugada syndrome.

Main Methods:

• Review of current literature on cardiac electrical storm.
• Analysis of multi-modality treatment approaches including ICD reprogramming, sympathetic blockade, anti-arrhythmic drugs, catheter ablation, and neuraxial modulation.
• Examination of ES management in inherited channelopathies.

Main Results:

• Catheter ablation for ES demonstrates excellent outcomes, with over 90% storm resolution at 1 year and a low complication rate (approximately 2%).
• Triggers for ES are identifiable in a minority of patients, suggesting complex interplay of factors.
• Emergent transfer to specialized centers for multi-modality treatment is warranted.

Conclusions:

• Cardiac electrical storm is a critical emergency requiring prompt, multi-modal intervention.
• Catheter ablation is a highly effective adjunctive therapy for ES.
• Recognizing ES in channelopathies and other specific conditions is crucial for tailored treatment.