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About Us

heart hologram doctor

Our story

Harefield Hospital has 50 years of experience in heart transplantation.

Professor Sir Magdi Yacoub carried out Harefield’s first heart transplant on the 8th September 1973.

Since then, we have performed more than 2,000 heart transplant operations, with one of the best long-term survival rates in the UK.

The unit has one of the UK’s largest ventricular assist device (LVAD) services, which provides many patients with severe heart failure the chance to live longer, better quality lives.

Heart transplant

In 2023 Harefield carried out 39 adult heart transplants.


Harefield has more than 70 living LVAD patients under regular follow-up.


The unit has more than 500 living heart transplant recipients under its care.

We are driven by values

The principal value of our course is to share our knowledge.

We believe in sharing what we know so that what we teach can help patients everywhere.

dr owais dar

Dr Owais dar MRCP, MDres

Course convenor

Consultant Cardiologist in Heart Failure, Transplant and MCS, Harefield Hospital.
Honorary Senior Lecturer, Adjunct Senior Lecturer School of Cardiovascular Medicine and Sciences Kings College London.

Dr Dar completed his specialist general cardiology training and sub-speciality heart failure training in London (United Kingdom), Vienna General Hospital (Austria) and Stanford Health Care (California, USA). In Oct 2015 he took up his current post within Harefield Hospital.

Dr Dar got his research degree from the National Heart and Lung Institute, Imperial College London, in 2010, studying the role of telemonitoring in heart failure patients. His research interests include studying non-invasive techniques in cardiac rejection diagnosis, obesity and weight loss in advanced heart failure, advanced heart failure epidemiology, and development of non-invasive cardiac output monitoring techniques.