It is thought there are about two million people with heart rhythm problems in the UK, although many of these will be undiagnosed.

BBC: Electrode vest gives hope to heart rhythm patients

Atrial fibrillation is the most common heart rhythm disturbance, with over half a million sufferers in the UK. It increases the risk of a person having a stroke by five times and doubles the risk of death.

BBC: Pioneering robotic arm operation at Glenfield Hospital