About Us
Founded by Dr Syed Ahsan, The London Heart Clinic is a world-class cardiology centre based in the famous Harley Street region, with clinics around London for your convenience. Rest assured that our heart specialists understand the worry associated with heart conditions. We take the time to address your specific concerns and symptoms.
We promise to deliver the highest quality care for your health without compromise. We are here to help – please contact us if you want more information or to schedule a consultation.
Why choose London Heart Clinic
Heart problems can manifest in a variety of ways. We are experts in evaluating the cause of your symptoms through careful assessment and appropriate testing. You may already have a diagnosis and are seeking a second opinion or want a better understanding of the treatment options. You may not have any symptoms but want an assessment or screening for your heart to prevent problems in the future.
We deliver the latest and most effective evidence-based treatments at various locations in London and Surrey.
We have a network of world-class specialists in different areas of cardiology working together to ensure that you are receiving the highest standard of care.
Dr Syed Ahsan is a Consultant Cardiologist and Heart Rhythm Specialist at Barts Heart Centre within St Bartholomew’s Hospital.
Dr Syed Ahsan is a Consultant Cardiologist and Heart Rhythm Specialist at Barts Heart Centre within St Bartholomew’s Hospital – the largest cardiac centre in Europe. He previously served as a consultant at the Heart Hospital, University College London, and is also a consultant at North Middlesex University Hospital, where his practice covers all aspects of adult cardiology. Dr Ahsan is one of the leads for Atrial Fibrillation at Barts Heart Centre.
Recognised by his peers as a Top Doctor in Cardiology (2021), Dr Ahsan has also been awarded Outstanding Patient Experience (2025) and Great Patient Experience (2026) – a testament to his commitment to placing the patient at the heart of everything he does.
Dr Ahsan graduated from Guy’s, King’s and St Thomas’ Medical School in 2000 with a First Class Honours degree in his BSc. He undertook specialist cardiology training at some of London’s most prestigious hospitals, including the Royal Brompton Hospital, Great Ormond Street Hospital, and the Heart Hospital, where he completed his fellowship in Cardiac Electrophysiology.
His postgraduate medical doctorate, awarded by University College London, evaluated strategies to optimise outcomes in patients with cardiac rhythm devices. His research received the Royal Society of Medicine National Prize in 2009 and has been presented at national and international cardiac conferences. He has been a finalist in two national young investigator awards. He is the author of over 80 peer-reviewed Publications spanning atrial fibrillation ablation, hybrid convergent procedures, implantable defibrillators, cardiac resynchronisation therapy, and ventricular arrhythmia mapping.
In clinical practice, Dr Ahsan is a highly experienced operator who routinely implants all types of cardiac pacing, resynchronisation, and defibrillator devices. He performs arrhythmia ablations and coronary angiography, and sees patients with blackouts, chest pain, and high blood pressure.
Dr Ahsan is the specialist cardiologist for The Smart Clinics, a London-based private GP and healthcare company.
He takes the time to make a complete assessment and explains all aspects of the consultation and treatment clearly, ensuring patients are fully informed and involved in their care.
Dr Ahsan sees both NHS and private patients and is recognised by Bupa, AXA Health, Cigna, Pru Health, Aviva, Simplyhealth, and others.
GMC: 4743161
About London Heart Clinic FAQs
Welcome to the London Heart Clinic video library
Welcome to the London Heart Clinic video library
0:27
Dr Syed Ahsan
Video Description
Video Transcript
Hi there. My name’s Syed Ahsan from the London Heart Clinic. I see patients with all types of heart conditions and have a special interest in heart rhythm problems. Here you’ll find our video library, which deals with some of the most frequently asked questions that patients that I see will ask me in clinic. And hopefully there’ll be a use to you. Feel free to browse through the library, browse through the website, and if you’ve got any further questions or wanna make an appointment, please do get in touch.
What type of patients do you normally see?
What type of patients do you normally see?
0:27
Dr Syed Ahsan
Video Description
Video Transcript
So as a cardiologist, I see all types of patients with different heart conditions. My special interest is in heart rhythm disorders, so SVTs, atrial fibrillation, pacemakers, but we see patients with chest pain, high blood pressure, patients with dizziness, blackouts, and really any cardiac concerns.
Can I come see you for a second opinion?
Can I come see you for a second opinion?
0:29
Dr Syed Ahsan
Video Description
Video Transcript
Of course you can. We will be delighted to see you for a second opinion. We see many patients who just want another opinion and some – maybe some – reassurance, having seen a cardiologist elsewhere. If you can bring any reports or tests that you’ve had done already, that will save us from having to repeat them, but we will go through things again with a fresh pair of eyes and hopefully be able to give you that reassurance.
What procedures can be completed during an outpatients appointment?
What procedures can be completed during an outpatients appointment?
0:27
Dr Syed Ahsan
Video Description
Dr Syed Ahsan lists some of the procedures can be completed during an outpatient appointment, including an ECG, ultrasound scan, and certain diagnostic tests can also be implanted in the outpatient setting.
About Us
Video Transcript
So we can certainly do a lot of the diagnostic tests that you may need, for example, an ultrasound scan, an ECG, a heart monitor, they can all be fitted for you normally at the same time as your appointment, or very soon after. Certain diagnostic tests that we do such as implantable loop recorder or reveal LINQ device, which is there to monitor your heart, can also be implanted in the outpatient setting now, rather than requiring you to have an admission for this procedure.
When should GPs refer to a cardiologist?
When should GPs refer to a cardiologist?
0:33
Dr. Syed Ahsan
Video Description
In this short video, Dr. Syed Ahsan counsels GPs on when they should refer their patients to a cardiologist. Some of the red flags for referral include palpitations, black outs, and chest pain.
About Us
Video Transcript
So current recommendations are that any patient with atrial fibrillation, which has been documented, or felt on a pulse check, should be seen by a specialist. And this involves doing an ECG, getting an echocardiogram to confirm the heart structure is normal. Many GPs are now starting the patients on anticoagulation, but if you’ve got any concerns or you are worried about your patient, and actually it’s good practice for these patients to be seen by a cardiologist.
Questions to ask your cardiologist before a procedure?
Questions to ask your cardiologist before a procedure?
1:12
Dr Syed Ahsan
Video Description
When you are having a heart procedure, Dr. Syed Ahsan advises that you do research and ask your cardiologist to go through the procedure and its risks in detail with you.
About Us
How many consultations do you need?
How many consultations do you need?
0:39
Dr Syed Ahsan
Video Description
Dr Syed Ahsan, Consultant Cardiologist explains the step by step consultation process. Usually patients will require an initial consultation where he will go through a detailed history and arrange some preliminary tests. Patients usually are seen within 2-3 consultations.
About Us
Video Transcript
So normally you’ll need an initial consultation where we go through a detailed history, arrange some preliminary tests, and depending on what those tests results show, if we found the cause for your problems, we can either treat it or advise you what to do, or maybe we don’t need to do anything and we can discharge you. Sometimes we may need to arrange further tests after your initial tests come back, and that can require an extra consultation. But normally within two or three consultations, we can see you, give you the tests that you need, and hopefully give you answers and treatments for any problem that you have.
How long will I have to wait for an appointment?
How long will I have to wait for an appointment?
0:18
Dr Syed Ahsan
Video Description
Dr Syed Ahsan assures patients that the wait times for an appointment or consultation are not long; he runs clinics around London, and can work with your schedule. Book an appointment today.
About Us
Video Transcript
So, it’s not a long wait for a consultation. We can normally accommodate you quite quickly. I do clinics throughout London, and I run clinics both in the day and the evening. So, we can fit around your work schedule and your location.
What cardiac diagnostic tests are available at London Heart Clinic?
What cardiac diagnostic tests are available at London Heart Clinic?
0:25
Dr Syed Ahsan
Video Description
Dr. Syed Ahsan is a Consultant Cardiologist and Heart Rhythm Specialist, and in this short video he details the whole range of cardiac diagnostic tests.
Heart Screening
Video Transcript
So, we can arrange a whole set of cardiac diagnostic tests ranging from simple blood tests and ECGs to more specialist test such cardiac MRIs and CT scans. We also have a network of cardiologists with different specialist areas so we can deal with all your cardiac health needs.
Whats included in the consultation?
Whats included in the consultation?
0:56
Dr Syed Ahsan
Video Description
An initial consultation with Consultant Cardiologist Dr Syed Ahsan involves him taking a detailed history of your problem, looking at your family history and lifestyle as well as answering any questions. The consultation can last between 30-45 minutes and you may be referred for further tests.
About Us
Video Transcript
So, when you come to see me, I will take a history, a full detailed history about your problem, any other conditions you may have, family history, and your lifestyle. And depending on what your condition is or what we find, we may refer you on, for further tests. These include heart tracing scans, or CT scans. So that will give us all the information we need. The initial consultation normally lasts somewhere between half an hour to 45 minutes and follow-up consultations can be a bit shorter depending on what we need to discuss. But what I do try and do is to try and answer all your questions in quite a lot of detail and hopefully provides you with information and leave the consultation feeling more informed about your condition.
What happens during a consultation at london heart clinic?
What happens during a consultation at london heart clinic?
0:27
Dr Syed Ahsan
Video Description
Dr Syed Ahsan lists some of the things that happen during a consultation at London Heart Clinic, including a full detailed medical history and a cardiac examination, as well as arranging some routine tests, if needed.
About Us
Video Transcript
If I’m seeing you for the first time, I will take a full detailed history, regarding your problem, your cardiac history, and your other medical history. Normally we’ll do a cardiac examination and the whole consultation process lasts from between 30 to 45 minutes depending on what we agree on and what we decide is important to do next. We may arrange for you to have some routine tests either on the same day or shortly after.
Where are you based?
Where are you based?
0:17
Dr Syed Ahsan
Video Description
Dr Syed Ahsan is a Consultant Cardiologist based in London. He works out of a number of locations.
Video Transcript
So, I’m based in London. I will practice out of various locations in and around London. So, normally, there is a location which is convenient or close to you where you can be seen fairly quickly and easily.
Enquiry thank you
Enquiry thank you
0:14
Dr Syed Ahsan
Video Transcript
Hi there, it’s Dr. Syed Ahsan here. Thanks for your inquiry, someone will be in touch within the next working day regarding the details of booking an appointment at a time and place that suits you. I look forward to seeing you at the London Heart Clinic.