Cardiac arrest following scorpion envenomation.

Scorpion stings are a common occurrence in Saudi Arabia. The majority of cases present with local pain at the site of envenomation, and follow a benign clinical course. Severe systemic toxicity and mortality are uncommon. Reported deaths have been attributed to a primary effect of the venom on the cardiovascular system. Toxicity of envenomation varies between species and within the same species of scorpions in different geographic regions. Severe systemic toxicity is rarely encountered in the Central Province of Saudi Arabia. The case presented is that of cardiac arrest, following scorpion envenomation in a 51year-old male from the Riyadh area. This complication of envenomation is highly unusual. Mechanisms of venom toxicity and management guidelines are discussed.