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  • Haemorrhage

    Bleeding caused by blood escaping into the tissues. 

  • Haemorrhagic stroke

    A stroke that happens when a blood vessel bursts, leading to bleeding in the brain (also called a ‘brain haemorrhage’). 

  • Healthcare professional

    A professional involved in stroke care, such as a doctor, nurse, therapist, or care staff.  


    A cholesterol charity. 

  • Hemianopia

    Blindness or some loss of vision in one part of the visual field.  

  • Homeostasis

    Regulation of internal environment (e.g. body temperature regulated at 37°C).  

  • Hydrocephalus

    A build up of fluid within the skull. 

  • Hyperacute stroke unit/centre/service

    A stroke unit, centre or service that treats patients in the first 72 hours of symptom onset. 

  • Hyperlipidaemia

    Raised levels of lipids (cholesterol, triglycerides or both) in the blood serum. 

  • Hypertension

    Raised blood pressure. 

  • Hypertensive encephalopathy

    Brain damage caused by raised blood pressure. 

  • Hypoglycaemia

    Blood sugar levels lower than the normal range. 

  • Hypoxia

    Blood oxygen levels outside the normal range, e.g. below 95% saturation. 

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