Direct current (DC) cardioversion is an everyday clinical procedure used to restore sinus rhythm from atrial fibrillation. This review summarises the current state of art in Denmark. Sufficient anticoagulation must be ensured before DC cardioversion to reduce the risk of thromboembolism. Biphasic maximum energy shocks delivered via anterolateral electrodes are recommended. Overall success is high, and the complication rate is low. Relapse of atrial fibrillation is common, and a long-term treatment strategy which may include antiarrhythmics, ablation and lifestyle change should be established in collaboration with the patient.