Hunaid A Vohra1
, Samena Chaudhry1
, Christopher MR Satur1
, Mary Heber2
, Rob Butler3
and Paul D Ridley1 
1
Department of Cardiothoracic Surgery, University Hospitals North Staffordshire NHS Trust, Stoke-on-Trent, UK
2
Department of Cardiology, Princess Royal Hospital, Telford, UK
3
Department of Cardiology, University Hospitals North Staffordshire NHS Trust, Stoke-on-Trent, UK