Arrhythmia
Heart and circulation
There are a number of different types of arrhythmia. Most arrhythmias that come from the top of your heart (supraventricular or atrial) can cause symptoms but aren't life threatening. Arrhythmias that arise from your ventricles (ventricular) are more serious and can sometimes be fatal.
Related articles
Coronary heart disease is due to fatty deposits building up on the walls of the arteries to the heart. It causes angina, which is chest pain.
In the UK, more people die from...
Heart block causes your heartbeat to slow down or beat irregularly. It happens when the electrical signals that control your heartbeat are slowed down or blocked as they travel...