Clinical expertise

Professor John Simpson has more than 20 years of experience in paediatric and fetal cardiology.

He performs treatments such as:

  • fetal cardiology consultation
  • paediatric cardiology consultation
  • fetal echocardiography (from 13 weeks’ gestation)
  • echocardiography
  • 3D echocardiography
  • transoesophageal echocardiography


Professor John Simpson participates in both acute and outpatient management of patients with congenital heart disease. His particular focus is on ultrasound imaging of the heart, with sub-speciality interests in prenatal diagnosis, 3D echocardiography and transoesophageal echocardiography.

John is regularly consulted both within the UK and abroad for advice on diagnosis and management and holds a national clinical excellence award.


  • 1985: BSc – University of Edinburgh
  • 1987: MB ChB – graduated in medicine from the University of Edinburgh. Trained in paediatric cardiology at Guy’s Hospital in London and at the University of California, San Francisco
  • 1999: Consultant at Guy’s and St Thomas’ NHS Trust


Professor John Simpson’s research interests include:

  • 3D echocardiography
  • improving prenatal diagnosis of congenital heart disease using machine learning/automation
  • virtual reality imaging of congenital heart disease


John has published over 150 scientific papers and has contributed to the leading textbooks in this field. He recently led the USA/European expert group on the application of 3D echocardiography in congenital heart disease. John presents and teaches regularly at national and international conferences in the field.