Although your GP may do initial tests and suggest simple steps to rule out triggers such as stress, most people in the UK can expect to be assessed by a specialised cardiac unit, so that the exact arrhythmia can be pin-pointed. Underlying disease, such as thyroid problems, which can cause arrhythmias, may need to be treated. A variety of drugs are used to control abnormal heart rhythms, while in some cases a pacemaker may need to be fitted. These devices are used when the heart is beating too slowly, and consist of an electrical wire into the heart, attached to an external battery, which delivers a regular pulse of electricity to trigger the heart to beat. Pacemakers are now the ultimate in high tech devices - and very different to the first ones used in the 1930's.
Ventricular arrhythmias can cause sudden death in someone who appeared previously fit and well.
They act by sensing the abnormal electrical stimuli in the heart and override them, sometimes by delivering a tiny electrical shock within the heart. Occasionally, surgery is needed to cut abnormal nerve wiring within the heart. The BBC is not liable for the contents of any external internet sites listed, nor does it endorse any commercial product or service mentioned or advised on any of the sites. Always consult your own GP if you're in any way concerned about your health.