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Word Definition


A blot clot forms after bleeding from a burst blood vessel. A haemorrhagic stroke can cause a haematoma to form within the skull.
Haematoma is a type of blot clot. 

It forms after a blood vessel has burst. 

It can form inside your skull.


When a blood vessel bursts, causing bleeding into the surrounding tissues.
Haemorrhage is when a blood vessel bursts. 

It causes bleeding into the surrounding area.

Haemorrhagic stroke

Occurs when a blood vessel or an aneurysm bursts in the brain, causing bleeding inside the brain.
Haemorrhagic stroke is when a blood vessel bursts in the brain. 

It causes bleeding inside the brain.


Loss of one half of the visual field in each eye. People may experience other people appearing to have only half a face. When reading, words and sentences disappear once they fall into the missing visual field.
Hemianopia is when you lose one half of your vision. 

You might see people with only half a face. 

If you read a book, you might only see half the page.


Weakness on one side of the body, affecting the arm, the leg or both.
Hemiparesis is when you are weak on one side of the body.

It can affect your arm or your leg, or both.


Paralysis on one side of the body, affecting the arm, the leg or both.
Hemiplegia is when you can’t move one side of your body. 

It can affect your arm or your leg, or both.


The brain is divided into two halves: a left hemisphere and a right hemisphere. The left hemisphere controls most functions on the right side of the body, while the right hemisphere controls most functions on the left side.
A hemisphere is one half of the brain.

The brain has two halves.

One half is the left hemisphere.

The other half is the right hemisphere.

The left hemisphere mostly controls the right side of the body.

The right hemisphere mostly controls the left side of the body.


An anticoagulant medication that stops the blood from forming clots.
Heparin is a type of medicine. 

It stops your blood from forming clots.

High-density lipoprotein

Also known as the good cholesterol; a compound consisting of a lipid and a protein that carries a small percentage of the total cholesterol in the blood and deposits it in the liver.
High-density lipoprotein is a type of particle in your body. 

It is also known as ‘good cholesterol’.

It helps remove fats from cells and artery walls.

It carries fats to the liver.

The liver can get rid of fats from the body.


Hormone replacement therapy
Hormone replacement therapy


Therapy in warm water, which allows the body to float and strengthens the power in those muscles that need it. It provides gentle resistance to movement in the water for exercise and enables relaxation of the muscles.
Hydrotherapy is when you do exercise in warm water. 

Moving in water helps you strengthen your muscles. 

It also lets you float and relax your muscles.


High cholesterol (also known as hyperlipidaemia).
Hypercholesterolaemia is when you have high cholesterol.

It is also known as hyperlipidaemia.


High blood pressure.
Hypertension is when you have high blood pressure.


Also known as spasticity. High muscle tone where the affected muscles are stiff or tight.
Hypertonia is when your muscles are stiff or tight. 

It is also called spasticity. 


Low Blood Pressure.
Hypotension is when you have low blood pressure.


Low muscle tone where affected muscles are floppy.
Hypotonia is when your muscles are weak and floppy.


Also known as anoxia. Lack of oxygen delivery to a cell, resulting in low energy production and possible cell death.
Hypoxia is when your cells don’t get enough oxygen. 

This means they don’t produce much energy. 

The cells might even die.