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Dr Jonathan Byrne
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Dr Jonathan Byrne has been a Consultant Cardiologist at King’s College Hospital since 2008. Dr Byrne completed his undergraduate medical training in Bristol and then continued general professional medical training in the South East of England and London. He was awarded a PhD in the academic department of Cardiology at King’s College Hospital in 2004. He completed extensive training in interventional cardiology at King’s College Hospital from 2004 and continued this along with transoesophageal echocardiography and cardiac CT scanning training on Vancouver Island, Canada in 2006 as an international fellow.
Alongside a wealth of general cardiology experience including the assessment and treatment of coronary and valvular heart disease and risk stratification he also treats hypertension and general heart rhythm disturbances, patients with angina, heart failure and high blood pressure. Dr Byrne is an interventional cardiologist who specialises in the treatment of coronary artery disease. This includes the treatment of narrowed, diseased heart arteries with angioplasty and stents, with the majority of procedures performed form the radial (wrist). He also treats patients with valvular heart disease with new treatments which do not require an operation, such as TAVI (transcatheter aortic valve implantation) and Mitraclip (percutaneous treatment of the mitral valve). As well as coronary and structural intervention he also carries out a number of imaging tests for the heart including transoesophageal echocardiography and cardiac CT scanning to screen and assess patients with the potential coronary disease.
Since his appointment as a consultant in 2008, he has also been pioneering in the development of the structural programme at Kings College Hospital, with the use of novel percutaneous techniques to treat aortic and mitral valve disease.
His research interests have included the molecular mechanisms which underlie the development of left ventricular hypertrophy and the application of coronary physiology in an interventional setting. His research has also explored the differences and potential advantages of intervention performed from the radial artery.

Outside of work Dr Byrne enjoys music, both listening and playing! He is currently re-learning the piano. If he’s not practicing the piano he can be found cycling, playing tennis or skiing. 

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Medical Procedures

  • Narrowed diseased heart arteries
  • Angioplasty
  • Stents
  • TAVI (transcatheter aortic valve implantation)
  • Mitraclip (percutaneous treatment of the mitral valve)`
  • Transoesophageal Echocardiography
  • Cardiac CT Scanning

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Special Interests

  • Heart Failure
  • Left Ventricular Hypertrophy
  • Coronary Heart Disease
  • Hypertension
  • Arrhythmia
  • Palpitations
  • Angina
  • Interventional Cardiology



  • MB Chb - University of Bristol
  • PhD - University of London - 2004



  • British Cardiac Society
  • British Cardiovascular Intervention Society



Very speedy response


Very calm and reassuring