Ventricular ectopics can potentially lead to ventricular fibrillation (VF). A case of idiopathic VF that began as ventricular bigeminy is presented. A 30-year-old man lost consciousness transiently while driving but made a complete recovery soon after. He was pale and sweaty at the onset of the event. There was neither a history of ill health nor a family history of sudden cardiac death. He was asymptomatic on arrival at the emergency department (ED) with sinus tachycardia. Two hours later ventricular bigeminy was observed. This subtle presentation did not qualify him for being high risk according to the American College of Physician’s recommendations or the San Francisco syncope rule, which almost led to his discharge from the ED. Despite this, he was admitted for observation. The patient had four VF arrests overnight, which were eventually terminated by emergency radiofrequency ablation. Upon further investigation, he was found to be normal on cardiac magnetic resonance imaging, echocardiogram and 24-h Holter monitoring. His serum biochemistry was normal, ruling out electrolyte disturbances. He eventually received an implantable cardioverter and remained free of recurrences in the subsequent months. This case serves as a reminder not to ignore ventricular ectopics or bigeminy.
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