A 67-year-old has abrupt transient loss of consciousness while walking, with rapid recovery and no vasovagal prodrome. Initial ECG shows complete right bundle branch block. Examination and glucose are normal. What is the next step?AArrange an outpatient EEG because abrupt recovery favours focal epilepsyBRefer for cardiovascular assessment reviewed within 24 hoursCArrange routine echocardiography and review in six weeksDPerform carotid Doppler ultrasonography as the first vascular investigationEDiagnose uncomplicated syncope and provide hydration and posture adviceCheck my answer