Which nonpharmacologic strategy is commonly used to reduce arrhythmic burden in electrical storm?

• A. Increased physical activity
• B. High-dose caffeine
• C. Catheter ablation of VT substrate and optimized antiarrhythmic therapy; consider sedation
• D. Isolated sleep deprivation

Answer: (C)

Electrical storm is driven by recurrent ventricular tachyarrhythmias, so the most impactful nonpharmacologic approach is to target and eliminate the underlying VT circuits. Catheter ablation of the VT substrate maps scar-related reentry pathways and destroys the tissue that sustains the arrhythmias, which can dramatically reduce future VT episodes and the overall arrhythmic burden. This mechanical solution addresses the root cause of the storm rather than just suppressing rhythms with drugs. In practice, ablation is often used alongside optimized antiarrhythmic therapy to control residual triggers, and sedation is used to blunt sympathetic drive during the acute phase and the procedure. In contrast, increasing physical activity, high-dose caffeine, or sleep deprivation would provoke sympathetic activity and worsen arrhythmias, so they are not appropriate.