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26 years of experience
Interventional Cardiology

Dr Sam Firoozi is a Consultant Interventional Cardiologist at St George’s Hospital in London. He graduated in 1995 from Guy’s & St Thomas’ Hospitals Medical School and subsequently completed his medical and cardiology training in several London teaching hospitals. In 1999 he was awarded a British Heart Foundation Fellowship enabling clinical research into heart muscle disease and sports cardiology at St George’s University of London.

Between 2002 and 2008, Dr Firoozi completed training in general and interventional cardiology, including an interventional cardiology fellowship at St George’s Hospital. This lead to his appointment as consultant general and interventional cardiologist in 2009. He has a special interest in high-risk coronary intervention and structural heart intervention, including TAVI. He has developed a very high-volume interventional practice and regularly consults a large number of patients.

Dr Firoozi is also involved in higher medical education for undergraduate and postgraduate students and has run training courses. He is also an active member of several organisations including The British Cardiovascular Society (BCS) and The British Cardiac Interventional Society (BCIS) and a Fellow of the Royal College of Physicans.

Dr Firoozi sees patients at the following location:

The Harley Street Clinic, 78 Harley Street London W1J 7HJ

Available on Thursdays (other days on an ad hoc basis)

He carries out interventional procedures every week at:

The Harley Street Clinic, 35 Weymouth Street London W1G 8BJ

Special interests:

Dr Firoozi specialises in interventional cardiology with particular interest in:

• Coronary artery disease and coronary intervention (angioplasty and stenting) • Structural heart intervention • TAVI • Treatment of complex coronary disease and surgical turn downs

Diseases, Medical Tests and Treatments:

  • TAVI (transcatheter aortic valve implantation)
  • Atrial fibrillation
  • Syncope
  • Pacemaker implantation
  • Angiogram
  • Cardiac catheterisation
  • Coronary angiogram
  • PCI
  • PTCA
  • Coronary angioplasty
  • Coronary stenting
  • Aortic stenosis
  • Coronary angiography
  • Cardiac screening test
  • Coronary and ischaemic heart disease
  • Interventional Cardiology
  • Pacing (cardiology)
  • Angina
  • Chest pain
  • Breathlessness
  • Shortness of breath
  • Hypertension
  • High blood pressure
  • Palpitation
  • Arrhythmia
  • Blackouts
  • Faints
  • Heart attack
  • Myocardial infarction
  • Heart valve disorder
  • Valvular heart disease
  • Sports cardiology
  • Cardiomyopathy
  • Atrial fibrillation
  • Tachycardia
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46 years of experience

Dr Wyn Davies is a consultant cardiologist who has long had an interest in the management of cardiac arrhythmias. He has been based at St Mary's and Hammersmith Hospitals in London where he established the department of cardiac electrophysiology. He has pioneered a number of new treatments, including the use of a robotic arm to carry out delicate procedures to eliminate heart rhythm disorders. He introduced non-contact mapping of cardiac arrhythmias into clinical practice for humans performing the first human studies and studied the Rhythmia heart rhythm mapping system which uses a whisk shaped probe, covered with electrodes, to enable fast and accurate measurement of a cardiac chamber in under 15 minutes.

Current research interests include mechanisms of causing clinical rhythm abnormalities, mapping and ablation of cardiac arrhythmias, new energy sources for catheter ablation and automatic arrhythmia recognition. Dr Davies is also the medical director for HCA's Harley Street Clinic, leading interactions with medical staff and the leadership team. He is the Chairman of HCA's pan London Cardio-thoracic and Vascular Department. He was the first President of the European Cardiac Arrhythmia Society and has been Honorary Treasurer of the British Cardiovascular Society. He has sat on or chaired numerous National and International Scientific and Advisory Boards.

He qualified in 1976 from Westminster Medical School and undertook post-graduate training at St Stephen's, Westminster, the London Chest, Guy's and St Bartholomew's Hospitals. He is a Fellow of the Royal College of Physicians, the Heart Rhythm Society and of the British Heart Rhythm Society.

It is important that HCA is transparent about our relationship with those doctors who provide us with clinical guidance on delivering the best possible care to patients and operating our hospitals safely and efficiently. We set out here some of the ways in which we work together and the amount we pay this doctor for such services.

Diseases, Medical Tests and Treatments

  • ECG
  • Cardiac Arrhythmias
  • Catheter Ablation
  • Atrial fibrillation
  • Cardiac electrophysiology
  • Pacemaker implantation
  • ICD implantation

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22 years of experience
Heart Muscle Disease/Cardiomyopathy, Electrophysiology, Interventional Cardiology

Dr Whinnett is a cardiologist with a specialist interest in pacing, heart rhythm disturbances and heart failure. He performs ablation for atrial and ventricular arrhythmias and implantation of pacemakers including cardia resynchronisation devices and defibrillators.

Dr Whinnett is an international expert in the field of cardiac pacemaker implantation and treatment of heart rhythm problems. He is frequently invited to present at the major international conferences. He regularly trains other cardiologists from around the world in advanced techniques for pacemaker implantation. 

He leads a research program at Imperial College London which is focused on developing more effective treatments for people with heart rhythm problems. He has published many scientific papers in medical journals.

Diseases, Medical Tests and Treatments

  • pacemaker implantation
  • cardiac pacing
  • Atrial Fibrillation ablation 
  • Ablation to treat arrhythmia
  • Leadless pacemaker implantation
  • Pacemaker extraction
  • pacing and heart failure
  • cardiac electrophysiology 
  • atrial fibrillation 
  • ventricular fibrillation 
  • dizziness
  • loss of consciousness
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19 years of experience

Dr Nick Linton works as a consultant Cardiologist specializing in heart rhythm problems. It is a field he finds hugely rewarding. Dr Linton treats patients who have a wide range of presentations, such as palpitation, chest pain, shortness of breath, or collapses. He performs cardiac ablation procedures and pacemaker implantation.

Before pursuing a career in medicine Nick Linton obtained a master's degree in engineering, economics and management from Oxford University. After a period developing new cardiac output monitoring technology, he then studied medicine at King's College, London and qualified with distinction in 2002.

He obtained membership of the Royal Colleges of Physicians (MRCP) and trained in cardiology at Imperial College Healthcare NHS Trust (St Mary's and Hammersmith hospitals), St Thomas' Hospital and also completed a clinical fellowship in Bordeaux, a world renowned centre for cardiac electrophysiology.

Dr Linton is an expert in clinical assessment, investigation as well as invasive procedures for heart problems. As a cardiologist with a background in engineering, he utilised this unique experience in medical research. He has a particular interest in ablation treatments using 3D Mapping technologies. He has developed a leading cardiac mapping system with colleagues at Imperial College.

Diseases, Medical Tests and Treatments

  • Pacemaker Implantation
  • Cardiac Pacing
  • Cardiac ablation (ablation for all types of arrhythmia
  • General cardiology 
  • Heart Rhythm Disorders 

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27 years of experience

Dr Prapa Kangarantnam is a well-respected Consultant Cardiologist with Imperial College Healthcare NHS Trust. Additionally, he practices with HCA Healthcare offering prompt treatment at a time suitable to his clients. He specialises in the interventional treatment of cardiac arrhythmias and treats patients with palpitations, heart failure and atrial fibrillation. Dr Kanagaratnam was one of the first users of robotic ablation technology and throughout his career has used innovative and advanced technologies to offer first-class treatments and services. 


 Dr Kanagaratnam began his career at the prestigious Cambridge University graduating with a Medical Degree before completing specialist training in cardiology and electrophysiology at St Mary's Hospital in London. In 2002 he was awarded his PhD during which he won the British Cardiac Society Young Investigator Prize for his outstanding work. Following this, he received funding from the British Heart Foundation to continue his research and currently is involved in the research of atrial fibrillation, ventricular tachycardia and robotic ablation. He is an Honorary Senior Lecturer at Imperial College, and regularly supervised students during PhD studies. 

Diseases, Medical Tests and Treatments

  • Pacemaker Insertion
  • Angiogram
  • Echocardiogram
  • ECG monitor
  • Inherited Cardiac Conditions
  • Heart Attack
  • Syncope
  • Arrhythmias
  • Atrial Fibrillation

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Offers video consultation
Recommended by 2 specialists
31 years of experience
Heart Failure, Heart Muscle Disease/Cardiomyopathy, Interventional Cardiology + 1more

Dr Punit Ramrakha is a Consultant Cardiologist with over 20 years of experience. He specialises in coronary heart disease, hypertension, arrhythmia, blackouts and dizziness, heart failure, and valve disease. He is a skilled interventional cardiologist with broad expertise. His attention to detail and passion for results strengthens his performance across procedures, from coronary angioplasty with stents (including complex treatments such as rotablation and shock wave therapy) as well as structural heart interventions (ASD and PFO closure), and pacemaker implantation.

Dr Ramrakha graduated from Cambridge and Oxford Universities with first-class honoursand was appointed as a Consultant Cardiologist in 2002. His NHS practice is at the Buckinghamshire Hospitals NHS Trust and Imperial College Healthcare NHS Trusts. He has been the Clinical Director of Medicine at Stoke Mandeville Hospital, the Clinical Lead for Cardiology and is currently the Clinical Lead for Heart Failure in Buckinghamshire.

in 2005, Dr Ramrakha founded the Chiltern Hills Heart Clinic, Buckinghamshire's first private cardiology clinic. The clinic has been inspected by the Care Quality Commission several times and has passed each time with flying colours. In 2020, he co-founded the London Heart Practice, to provide excellence in cardiac care even in the time of coronavirus pandemic.

Dr Ramrakha is also well established in the scientific research community, authoring various medical textbooks, such as the Oxford Handbook of Clinical Medicine, Oxford Handbook of Acute Medicine, Oxford Handbook of Cardiology, as well as peer reviewed journals. His research interest is in vascular biology and clinical application of new and digital technologies such as the unique patient app HeartHealth (

Diseases, Medical Tests and Treatments


Arrhythmia (e.g. Atrial Fibrillation)

Blackouts and dizziness


Cardiac Rehabilitation

Chest Pain (Angina)

Cholesterol (Hyperlipidaemia)

Diabetic heart disease


Heart Failure

Heart Health (Wellbeing)

High Blood Pressure

Holes in the Heart



Stents / Angioplasty

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Offers video consultation
Recommended by 10 specialists
14 years of experience
Heart Muscle Disease/Cardiomyopathy

Dr Kanaganayagam is a Cardiologist and Honorary Senior Lecturer in Cardiology for Imperial and Chelsea and Westminster NHS Trusts and also offers private consultations. He sees patients with complaints of chest pain, breathlessness, palpitations, dizziness and leg swelling. He also treats patients with known coronary disease, valve disease, arrhythmias and heart failure as well as common conditions such as hypertension and high cholesterol.

He is the Lead for Cardiology Imaging at Chelsea and Westminster Hospitals, and has expertise in CT coronary angiography (with calcium score), stress echocardiography, transoesophageal echos and cardiac MRIs. Importantly, he uses these to thoroughly investigate and treat his patients appropriately, and performs these for other heart specialists to help manage their patients. He has been the Lead for a Community Heart Failure service at Imperial and continues to manage patients with both reduced and preserved systolic function (HFPEF and HFREF).

He continues to participate in original cardiovascular research, and has written review articles and lectured on cardiac CT, echocardiography and cardiac MRI.

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Recommended by 8 specialists
16 years of experience
Electrophysiology, Heart Failure, Heart Muscle Disease/Cardiomyopathy + 2more

 Dr Afzal Sohaib is a leading Consultant Cardiologist with a special interest in the management of heart rhythm disorders, such as atrial fibrillation (AF), and causes of palpitations, shortness of breath, and blackouts. He implants pacemakers and defibrillators and performs ablation procedures for heart rhythm disorders.

His NHS practice is at the Bart’s Heart Centre at St Bartholomew's Hospital in London, one of Europe’s largest specialist heart centres, and he is Clincal Lead for the heart rhythm service at Barking, Havering & Redbridge Unversity Hospitals, one of London's busiest Trusts. He is also an Honorary Clinical Senior Lecturer at Bart's and the London School of Medicine and Dentistry.

He graduated from the University College London in 2005 with a distinction and numerous prizes including the Betuel Prize for finishing second in the University of London Gold Medal Examination. After graduating he completed his cardiology training at leading centres in London including Hammersmith Hospital, the Royal Brompton Hospital, and Harefield Hospital.

He was awarded a prestigious Clinical Research Training Fellowship funded by the British Heart Foundation which funded his PhD at Imperial College London. Dr Sohaib’s PhD investigated how pacemakers improve symptoms in heart failure. He has published numerous articles in international peer reviewed scientific journals and regularly speaks at national and international cardiology meetings. He is author of the book "Decoding Cardiac Electrophysiology".

He enjoys teaching and training young aspiring cardiologists. He was President of the British Junior Cardiologists’ Association (BJCA) and was on the Council of the British Cardiovascular Society. You can learn more about his practice on

It is important that HCA is transparent about our relationship with those doctors who provide us with clinical guidance on delivering the best possible care to patients and operating our hospitals safely and efficiently. We set out here some of the ways in which we work together and the amount we pay this doctor for such services.

Read more
Offers video consultation
Recommended by 7 specialists
21 years of experience
Heart Failure, Electrophysiology, Interventional Cardiology

Dr Ahsan is a consultant cardiologist at Barts Health Centre, St Bartholomew's Hospital, where he is also the training lead for the heart rhythm section. He typically sees patients who are experiencing a range of cardiac symptoms including blackouts, chest pain, dizziness, and high blood pressure. Dr Ahsan regularly performs simple and complex catheter ablation treatments for all arrhythmias, including atrial fibrillation, using the most up-to-date technologies. He also specialises in the implantation of pacemakers, defibrillators, cardiac resynchronisation therapy, and other cardiac devices. In addition to his role at Barts Health Centre, Dr Ahsan also works at North Middlesex University Hospital, where he was responsible for establishing the arrhythmia service.

Dr Ahsan graduated with a first-class honours degree from Guy’s, King’s, and St Thomas' Medical School and went on to complete his specialist cardiology training in the London area and completed a fellowship in cardiac electrophysiology and cardiac devices at the Heart Hospital. He also achieved an MD from University College London, where he investigated techniques to improve outcomes in patients with cardiac rhythm devices, achieving the Royal Society of Medicine National Prize for his work.

Dr Ahsan puts his patients first in everything he does and takes the time to thoroughly exam his patients and ensure they understand their condition and treatment options. He is also passionate about research and is currently looking at new technologies for atrial fibrillation treatment. 

It is important that HCA is transparent about our relationship with those doctors who provide us with clinical guidance on delivering the best possible care to patients and operating our hospitals safely and efficiently. We set out here some of the ways in which we work together and the amount we pay this doctor for such services.

Read more
Recommended by 6 specialists
27 years of experience
Interventional Cardiology

Dr Balvinder Wasan trained at St Mary’s Hospital Medical School, which is now part Imperial College Medical School. He qualified in 1994 and undertook his specialist cardiology training in London. He was appointed as an Interventional Cardiology Consultant to the Queen Elizabeth & St Thomas’ Hospitals in 2005 and he also sees patients privately.

Dr Wasan was responsible for setting up a local angioplasty service at QEH and served as Clinical Director for Cardiology from 2013-2018. He has led on numerous patient-care improvement programmes and is also on the interventional rota at the Heart Attack Centre at St Thomas’

Dr Wasan has undertaken research to investigate the changes that occur in heart function after angioplasty and bypass surgery. He is an author of multiple papers on cardiac function, echocardiography, atrial fibrillation and hypertension.

Diseases, Medical Tests and Treatments

  • Screening high risk patients
  • Coronary angiography
  • Coronary angioplasty
  • Pacemaker implantation

  • Ischaemic heart disease (screening, prevention, diagnosis and management)
  • CT Coronary Angiography
  • Coronary Angiography 
  • Percutaneous coronary intervention - Angioplasty
  • Identifying patients at risk of cardiovascular disease
  • Cardiac risk factor identification and management 

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