PREVACT : Preventive REversal of Vitamine K Antagonist in Minor Craniocerebral Trauma

Inclusion Criteria: * Admission in an emergency departement for a recent and isolated minor head trauma with at least one of the following characteristic : a period of alteration in the level of consciousness, a period of loss of consciousness (\< 30 min), a posttraumatic amnesia, persistant posttraumatic headache, repeated vomitting (at least 2 episodes) or any other neurological sign such a convulsion or a localised neurological sign, wound of the scalp or the face testifying of the importance of the cranial trauma... * Subject receiving anticoagulant treatment with anti-vitamin K for the treatment of atrial fibrillation (AF) * Initial ED Glasgow Coma Scale (GCS) score of ≥13 * Achievable follow up * Informed consent form signed by the patient or if he/she isn't able an emergency inclusion can be realised. Exclusion Criteria: * Delay between the minor head trauma and the possible preventive PCC's administration \> 6h * Subject receiving anticoagulant treatment other than anti vitamin K (heparin, fondaparinux, dabigatran, rivaroxaban, apixaban...) * Subject receiving anticoagulant treatment for other reason than a AF * Subject on antiplatelet treatment (except the use of low dose of aspirin (≤ 100 mg/day) * Delocalised biology INR in capillary blood \< 1.5 if it's available (only in departement where this analyse is a usual practice) * Haemorrhage or suspected haemorrhage other than intracranial which could led to a reversion of the anticoagulation * Head trauma associated with one or further potential haemorrhagic traumatic lesions * Subject who reject the use of products derived from human blood * Women who are pregnant * Subject with any condition that, as judged by the investigator, would place the subject at increased risk of harm if he/she participated in the study * Subject without social security registered