Dr Georgios Karagiannis | Royal Brompton & Harefield Hospitals Education

Dr Georgios Karagiannis

Consultant cardiologist
Specialises in heart failure, preventative cardiology, echocardiography and acute cardiac care.

Dr Georgios Karagiannis is a consultant cardiologist at Harefield Hospital.

He studied medicine at the Aristotle University of Thessaloniki in Greece. He accomplished his specialist training in Greece and was awarded ‘excellent’ marks on completion. In 2009, he completed his PhD in Cardiology, in which he also received an ‘excellent’ mark.

Dr Karagiannis had been awarded fellowship of the European Society of Cardiology and fellowship of the European Heart Failure Association for this academic and clinical work.

Clinical expertise

Dr Karagiannis has substantial experience in general and acute cardiology with a specialist interest in:

  • heart failure
  • preventive cardiology
  • echocardiography
  • acute cardiac care.
Research interests

Dr Karagiannis mainly focuses on heart failure research. He has been awarded three national prizes for his research


Dr Karagiannis has developed a broad academic portfolio including publication in high profile medical journals. He has presented his work in both national and international congresses.

He has published papers on a range of topics, including:

  • left ventricular geometry as a major determinant of left ventricular ejection fraction: physiological considerations and clinical implications
  • a simple score for early risk stratification in acute heart failure
  • in-hospital bleeding events in acute coronary syndrome patients undergoing percutaneous coronary intervention in the era of novel P2y12 inhibitors
  • prevalence of impaired coronary flow reserve and its association with left ventricular diastolic functions in asymptomatic individuals with major cardiovascular risk factors
  • the sympathetic nervous system in heart failure physiology, pathophysiology, and clinical implications.

Dr Georgios Karagiannis has a keen interest in teaching and has the following roles:

  • honorary senior clinical lecturer at Imperial College London
  • senior lecturer at Brunel University London
  • Royal College of Physicians tutor
  • Educational lead for medicine at Hillingdon Hospital.