M Leo (Presenting Author) – Oxford University Hospitals NHS Foundation Trust, Oxford; M Pedersen – Oxford University Hospitals NHS Foundation Trust, Oxford; K Rajappan – Oxford University Hospitals NHS Foundation Trust, Oxford; M Ginks – Oxford University Hospitals NHS Foundation Trust, Oxford; R J Hunter – Barts Heart Centre, London; R Bowers – Hampshire Hospitals NHS Foundation Trust, Hampshire; M Kalla – Queen Elisabeth Hospital, Birmingham; Y Bashir – Oxford University Hospitals NHS Foundation Trust, Oxford; T R Betts – Oxford University Hospitals NHS Foundation Trust, Oxford