All of the following Clinical Features are seen in isolated head injury except

(B) Hypertension # History of Head Injury reveals: Mechanism of injury Loss of consciousness or amnesia Level of consciousness at scene and on transfer Evidence of seizures Probable hypoxia or hypotension Pre-existing medical conditions Medications (especially anticoagulants) Illicit drugs and alcohol> Causes of Brain Injury Hypoxia: P02 < 8 kPa Hypotension: Systolic blood pressure (SBP) <90 mmHg Raised intracranial pressure (ICP): ICP > 20 mmHg Low cerebral perfusion pressure (CPP): CPP <65 mmHg Pyrexia Seizures Metabolic disturbance.