Harley Street cardiologist Dr Kaloudis sees patients at 75 Harley Street, London W1G 8QL, and he is a Greek List member with a long hospital background in both Greece and London. This is general information and not advice, and it is written to help you find the right kind of specialist, not to tell you what care you need.
If you prefer a doctor from the community, our guide to Greek doctors in London brings together GPs, dentists and specialists in one place. Today we look at one of the specialists in it, Consultant Cardiologist Dr Konstantinos Kaloudis, as the colder months begin and many of us start thinking about health again.

Dr Kaloudis studied at the University of Milan and completed his specialty training in cardiology at the Hellenic Air Force General Hospital in Athens. That Athens training is the first thing many Greek patients notice, because it means a medical education that started close to home before moving to the UK.
In London he led non invasive cardiac diagnostics at University Hospital Lewisham, and he has worked with King’s College Hospital and Guy’s & St Thomas’. His listing also notes that he was a finalist for the European Society of Cardiology Young Investigator Award in 2010. These are the facts he shares publicly, and they are worth reading in full on his Greek List listing before you decide whether to get in touch.
Harley Street has been known for private medical practice for a very long time, and it sits in Marylebone, a short distance from many central London transport links. For Greeks and Cypriots who live or work in the centre, it can be a practical address to reach in a lunch break or on the way home.
The clinic describes a one visit consultation that includes an ECG and an echocardiogram. An ECG records the electrical activity of the heart, and an echocardiogram uses ultrasound to create images of it. Dr Kaloudis also lists complex echocardiography and cardiac CT among his areas of work, which reflects his years in cardiac diagnostics.
Whether any test is suitable for you is a decision for you and your doctor. If you have been referred, or you have an NHS letter or earlier results, ask the clinic what to bring and what they need before the appointment.
Dr Kaloudis lists the following areas of interest. The short descriptions come from NHS pages, which are a good starting point for plain English reading:
Listing an area of interest is not a promise of any result, and no article can say what a consultation will find. What a specialist can do is assess you, explain what he sees and tell you what the options are.
Greek stop: Dr Konstantinos Kaloudis, Comprehensive Cardiac Care, 75 Harley Street, London W1G 8QL. Phone 020 3149 9147. Hours on his listing: Monday 11 to 6, Tuesday to Thursday 11 to 7, Friday 10 to 6, closed at weekends.
Getting there: Harley Street is in Marylebone, central London. Check your route on the day, and contact the clinic for fees and availability. Opening hours can change, so confirm when you book.
Autumn and winter bring back routines after the summer, and for many people that includes catching up on appointments they postponed. It is a natural moment to read about heart health, write down questions and book a check you have been meaning to book. The NHS has clear pages on cardiovascular disease and on high blood pressure that are easy to read in ten minutes.
One important point from the NHS: if you think someone is having a heart attack, call 999 immediately. A private clinic is for planned appointments, not emergencies. For anything urgent, use emergency services, and for ongoing concerns your GP is usually the first call.
If you want to hear him first, Dr Kaloudis appears in a Hellenic TV Greek Stories video on Greek List: watch the video. His profile also links to Greek language reading, such as this guide to preventive cardiology, so you can read in the language you are most comfortable with.
Choosing a doctor is personal. Some people want a specialist who trained in Greece, some want a Harley Street address, and some simply want a clear explanation in a calm room. A listing gives you the facts to compare, and the clinic can answer the rest. Greek List does not recommend treatment, and every business we feature is a Greek List member, which means they are on a paid plan with a published listing.
Our full guide to Greek doctors in London is the place to compare GPs, dentists and other specialists if cardiology is not what you are looking for today.
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