Dr Callum Little
Consultant Cardiologist
Heart Health
Sub-specialties: Interventional Cardiology, Non-interventional Cardiology.

Overview
Dr Callum Little is a Consultant Cardiologist at OneWelbeck Heart Health, specialising in interventional and non-interventional cardiology.
About Dr Callum Little
Dr. Callum Little is a Consultant Cardiologist renowned for his commitment to delivering personalised, evidence-based care. With particular expertise in cardiac risk assessment and preventative care, he leads the chest pain and cardiac rehabilitation services at the Royal Free Hospital. Dr. Little also performs complex coronary interventions, including angioplasty and stenting, as well as pacemaker implantations.
He studied medicine at Imperial College School of Medicine, graduating with Merit, and subsequently trained in general cardiology and advanced interventional procedures at the Royal Free Hospital and Imperial College Healthcare at Hammersmith Hospital. Dr. Little further distinguished himself academically by earning a PhD from University College London, and he has been honoured with awards and grants from the Wellcome Trust and the Engineering and Physical Sciences Research Council.
Dr. Little’s dedication to his field is reflected in his patient-centred approach and his focus on reducing cardiac risk through innovative treatment strategies. His blend of clinical excellence and research-driven practice makes him a trusted figure in cardiology, committed to enhancing patient outcomes and advancing the science of heart health.
Areas of Expertise
Dr Callum Little commonly treats:
- Cardiology
- Coronary Artery Disease
- Interventional Cardiology
- Chest Pain
- Breathlessness
- High Blood Pressure
- Angina
- Valve disorders
- Heart failure
- Pacemaker implantation
- Cholesterol disorders
- Preventative Cardiology
Dr Callum Little offers tests and treatments for:
- CT coronary angiography
- CT calcium scoring
- CTCA
- Echo
- Coronary Angiography
- Coronary Angioplasty
- Holter monitors
- Zio Patches
- Blood Pressure monitors
Additional Information
Dr Callum Little's active memberships:
- Member of Royal College of Physicians
- British Cardiology Society
- British Cardiovascular Intervention Society
Dr Callum Little currently holds clinical posts at:
- Royal Free Hospital NHS Foundation Trust
- OneWelbeck Heart Health
Research Highlights
Dr Callum Little's key publications:
• ‘Optical Ultrasound Imaging for Endovascular Repair of Abdominal Aortic Aneurysms: A Pitot Study’
Little CD, Zhang S, Colchester R,Noimark S, Mathews S, Zhang E, Beard P, Mastracci T, Rakhit R, Desjardin AE (2023)
Medical Imaging Computing and Computer Assisted Intervention https://doi.org/10.1007/978-3-031-43996-4_67
• ‘Bend-insensitive fiber optic ultrasonic tracking probe for cardiovascular interventions’
Mathews S, Little CD, Zhang E, Beard P, Mastracci T, Rakhit R, Desjardin AE (2023)
Medical Physics https://doi.org/10.1002/mp.16334
• ‘Morphological and physiological characteristics of ruptured plaques in native arteries and neoatherosclerotic segments: an OCT-based and computational fluid dynamics study’ Jin C, Torii R, Ramasamy A, Tufaro V, Little CD, Konstantinou K, Tan YY, Cooper J, Crake T, O'Mahony C, Rakhit R, Egred M, Ahmed J, Karamasis G, Räber L, Baumbach A, Mathur A, Bourantas CV (2022)
Frontiers in Cardiovascular Medicine
• ‘Treatment Strategies and Outcomes of Emergency Left Main Percutaneous Coronary Intervention’ Bajaj R, Little CD, Baumbach A, Mathur A, Bourantos CV (2022)
American Journal of Cardiology
• ‘Impact of COVID-19 pandemic on management of non-culprit lesions in patients presenting with ST-elevation myocardial infarction: outcomes from the pan-London Heart Attack centres’
Little CD, Demir O, Jabbour RJ, Rahman H, Sayers M, Asrar A, Connolly M, Kanyal R, MacCarthy P, Wilson S, Dalby M, Jain A, Malik M, Rakhit R, Perera D (2021)
Catheterization and Cardiovascular Interventions https://doi.org/10.1002/ccd.30056
Reviews
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