Radiofrequency ablation (RFA) has revolutionised treatment for tachyarrhythmias and has become first line treatment for some tachycardias. Some arrhythmias are relatively common, atrial fibrillation for example affects up to 9% of our population over the age of 80 years and provides a very significant risk for thromboembolic stroke, haemorrhagic stroke as well as impairment of quality of life whilst also contributing to heart failure.