A 72-year-old with symptomatic atrial fibrillation for 4 days (onset well documented) desires electrical cardioversion today. He is haemodynamically stable and not anticoagulated. What is the best next step?APerform transoesophageal echocardiography today to exclude left atrial thrombus and proceed with cardioversion with periprocedural anticoagulationBDelay cardioversion and start aspirin onlyCProceed with cardioversion without anticoagulation because onset <7 daysDStart rate control and avoid cardioversion for 3 monthsEStart warfarin and cardiovert when INR >1.5Check my answer