AJ Graham (Presenting Author) – Cardiac EP Barts Heart Centre, Islington, UK; M Orini – Cardiac EP Barts Heart Centre, London, UK; G Dhillon – Cardiac EP Barts Heart Centre, London, UK; N Srinivasan – Cardiac EP Barts Heart Centre, London, UK; H Daw – Cardiac EP Barts Heart Centre, London, UK; A Cambridge – Cardiac EP Barts Heart Centre, London, UK; T Chow – Cardiac EP Barts Heart Centre, London, UK; M Earley – Cardiac EP Barts Heart Centre, London, UK; S Sporton – Cardiac EP Barts Heart Centre, London, UK; M Dhinoja – Cardiac EP Barts Heart Centre, London, UK; R Hunter – Cardiac EP Barts Heart Centre, London, UK; R Schilling – Cardiac EP Barts Heart Centre, London, UK; PD Lambiase – Cardiac EP Barts Heart Centre, London, UK