A case of ventricular tachycardia related to caffeine pretreatment.

Suboptimal seizure duration is commonly encountered in electroconvulsive therapy practice, especially in older patients with higher seizure thresholds. Intravenous caffeine is commonly used to improve seizure duration and quality in such patients and is generally well tolerated aside from occasional reports of relatively benign ventricular ectopy. We describe a patient with no previous history of cardiac disease or arrhythmia who developed sustained bigeminy and 2 brief runs of ventricular tachycardia after caffeine administration. Although intravenous caffeine is generally well tolerated, the clinician should be aware of the potential for unpredictable and serious ventricular arrhythmias.