Abstract
Visine eye drops are a commonly used topical drug for irritation of the eye. The active component in Visine eye drops is tetrahydrozoline. Tetrahydrozoline is an imidazoline derivative found in several ophthalmic and nasal decongestants. Exposure is common in young children, who unintentionally ingest it, but cases have been rising in the adult population. The main systemic effects are bradycardia and hypotension due to activation of the central alpha-adrenergic receptors. In this case report, a 76-year-old man presents with bradycardia after 24 hours following ingestion of 120 mL of 0.05% tetrahydrozoline (eight bottles of Visine eye drops) in a suicide attempt. His initial ECG demonstrated complete heart block and QT prolongation. Subsequent ECGs showed unremitting first-degree atrioventricular block and QT prolongation. Here, we are presenting the first case of complete heart block following tetrahydrozoline consumption.
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