Ten-year-old boy with congenital long QT syndrome type 2 (LQTS2) and life-threatening electrical storm: a case report of successful treatment with mexiletine.

We present a case of a boy with long QT syndrome type 2, who was admitted after an out of hospital cardiac arrest due to ventricular fibrillation. Subsequently, all treatments - intravenous magnesium, optimisation of electrolytes, an isoproterenol infusion - failed to terminate his electrical storm. As a last option before left-sided cardiac sympathetic denervation, mexiletine was started and the electrical storm resolved completely.