Dr Denis Michael O'Sullivan

Dr Denis Michael O'Sullivan is a Consultant Cardiologist who provides comprehensive diagnostic and therapeutic care for patients experiencing a wide range of cardiovascular conditions. He specialises in General Cardiology and Interventional Cardiology, offering an objective and patient-centred approach to heart health. Patients presenting with symptoms such as chest pain, breathlessness, palpitations, or elevated blood pressure receive reassuring, tailored guidance to manage both acute and chronic cardiac health concerns effectively.

In his clinical practice, Dr O'Sullivan focuses on the invasive and minimally invasive management of coronary artery disease and valvular heart conditions. His key areas of clinical interest include coronary angiography, angioplasty, coronary stent implantation, and transcatheter aortic valve intervention (TAVI). He also treats general cardiac conditions such as heart failure, heart rhythm disorders, hypertension, and hypercholesterolaemia. To ensure precise diagnosis and management, Dr O'Sullivan utilises diagnostic investigations including echocardiograms, electrocardiograms (ECGs), cardiac rhythm monitoring, and cardiac CT calcium scoring.

Dr O'Sullivan completed his undergraduate medical studies at Cambridge University, qualifying with distinctions in 1992. He subsequently undertook specialist postgraduate medical training across leading tertiary teaching centres. He was awarded a PhD for his research examining the mechanisms of coronary stent failure and completed an advanced fellowship in interventional cardiology in Vancouver, Canada. A Fellow of the Royal College of Physicians, Dr O'Sullivan remains actively engaged in clinical research and professional medical organisations, maintaining high standards of evidence-based care.