
Dr G. Sunthar Kanaganayagam
Professional statement
Dr G. Sunthar Kanaganayagam is a well-respected consultant cardiologist based in London, specialising in the diagnosis of chest pain, breathlessness, palpitations and the treatment of coronary disease, valve disease, heart failure, and hypertension. He has extensive expertise in cardiac imaging, including CT coronary angiography, cardiac MRI, and transoesophageal echocardiography.
Dr Kanaganayagam sees private patients at Chiswick Outpatients, The Harley Street Clinic, Welbeck and Syon Clinic. With over 15 years of experience, he also leads the cardiology imaging department at Chelsea and Westminster Hospital NHS Foundation Trust. He has had senior management roles at Imperial College Healthcare NHS Trust, where he served as a divisional director of governance and was on the executive management board. He also pioneered a community heart failure service working closely with local GPs to serve patients.
Dr Kanaganayagam holds a PhD from St Thomas’ Hospital and an MBBS from King’s College London, as well as an intercalated BSc in Pharmacology. He trained at Guy’s and St Thomas’ NHS Foundation Trust before completing his specialist cardiology training at Imperial College Healthcare and Royal Brompton and Harefield NHS Foundation Trust.
In addition to his clinical work, Dr Kanaganayagam is an honorary senior lecturer in cardiology at Imperial College London. He has published research in leading medical journals and contributes significantly in multidisciplinary teams in the management of both common and rare heart conditions.
Clinics

Syon Clinic - part of Circle Health Group
West London, 941 Great West Road, Brentford , TW8 9DUMedical insurances accepted
Credentials
Professional experience
- 19 years of experience
- Consultant Cardiologist, Chiswick Outpatients (present)
Professional memberships
- British Society of Echocardiography
- European Society of Cardiology
Education
- FRCP, Royal College of Physicians
- FRCP (Edin), Royal College of Physicians, Edinburgh (2010)
Teaching posts
- Honorary Senior Lecturer in Cardiology, Imperial College London (present)
Positions in organisations
- Lead for Cardiology Imaging, Chelsea and Westminster Hospital NHS Foundation Trust (present)
- Divisional Director of Clinical Governance for Surgery, Imperial College Healthcare NHS Trust (past)
Publications and conferences
- Dr Kanaganayagam's publications are available on his PubMed profile
- Dr Kanaganayagam's publications are available on ResearchGate
Languages spoken
- English
Reviews
- Would you recommend this doctor?
- Treatment of the doctor
- Treatment of the staff
- Waiting time
- Condition of facilities
- Dr Sunthar Kanaganayagam is A++++ across the board. I left my consultation appointment feeling at ease with any questions I’d gone in with answered and confident that I am in the absolute best care moving forward.
- Although I arrived a few minutes late - (traffic) Dr Kanaganayagam was his usual charming self. He was very thorough in his follow up to my hospital admission for 4 days in July. He offered me advice for the next consultation in 6 months and discussed the new medications.
- I am very happy for the care and concern that I have received from the Doctor, He is kind and very humble person. I am happy for all the information he had explained me.
- Dr Gajen was very helpful, knowledgeable, approachable throughout the consultation. We were able to ask him all our questions, share all the date we brought. We felt listened to and heard. He explained his interpretation of the situation and the options we have.