Dr Boon Lim

Cardiologist in London

MB BChir(Hons) MA FRCP PhD

Topdoctors Awards Top Doctors Awards: 2017, 2018 and 2021

Dr Boon Lim areas of expertise:

Professional statement

Dr Boon Lim is one of London's leading cardiologists and electrophysiologists. He specialises in heart rhythm disturbances, pacing and syncope at Imperial College and at his Harley Street clinic. He leads the established Imperial Syncope Diagnostic Service at Hammersmith Hospital and is frequently invited to national and international meetings to share his experience. He has a special interest in the mapping and ablation of atrial fibrillation (AF) and is highly-skilled at using modern 3-D mapping technologies.

Dr Lim has been awarded the prestigious Top Doctors Award in each of it's editions in 2017, 2018, and 2019-20. The Top Doctors Awards are peer-nominated by other medical specialists of the doctors that they would recommend to friends and family in times of medical need.

Dr Lim was awarded several distinguished prizes during his medical training at Cambridge University where he obtained a double First Class Honours Degree. He has continued his passion for education and research serving as an Honorary Senior Lecturer at Imperial College where he supervises several PhD students. He is very actively engaged in all aspects of research with a particular interest in developing the best techniques for treating atrial fibrillation. He is invited to speak both nationally and internationally to discuss his findings and to teach other physicians about the best techniques for complex mapping and ablation of atrial fibrillation and other complex arrhythmias.

He leads a very active syncope research team based at the Imperial Syncope Diagnostic Unit and is looking to improve healthcare delivery for patients through use of effective online education to help improve the quality of life for patients across the UK. 

Dr Lim is the author of the Penguin Life Experts book 'Keeping Your Heart Healthy' published in September 2021.

Would you recommend this doctor?

  • Bedside manner
  • Friendliness of the staff
  • Wait time
  • Facility's features
All reviews are from real patients and have been verified by our Client Relations department to ensure they meet the service standards.

Patient reviews

Verified Patient
28/01/2025

Would you recommend this doctor?

  • Bedside manner
  • Friendliness of the staff
  • Wait time
  • Facility's features

Patients comments

I cannot recommend Dr Boon Lim highly enough. He is extremely professional and personable. He has a well trained and friendly team supporting him who all put me at ease for my ablation procedure. To sum up cool, competent and caring.

Verified Patient
15/10/2024

Would you recommend this doctor?

  • Bedside manner
  • Friendliness of the staff
  • Wait time
  • Facility's features

Patients comments

Dr.Boon is an incredible, caring and professional doctor. I was rushed to the hospital came in as an emergency, a few minutes later I was diagnosed with WPW. Fast forward 2 hours later I was in the OR .It is only fair to say he saved my life. I'm forever grateful. He is the best.

Verified Patient
07/06/2023

Would you recommend this doctor?

  • Bedside manner
  • Friendliness of the staff
  • Wait time
  • Facility's features

Verified Patient
21/01/2022

Would you recommend this doctor?

  • Bedside manner
  • Friendliness of the staff
  • Wait time
  • Facility's features

Patients comments

Dr Lim was professional, insightful and thorough. He was able to disseminate the salient information quickly but without rushing, and I found his general manner to be reassuring, along with this diagnosis.


(71 reviews)
I had a consolation with Dr Boon Lim having suffered with ectopic heartbeats for some time now. Dr Boon Lim was exceptionally knowledgable, friendly, and a great listener. He was incredibly generous with his time, and articulated in a very accessible fashion what I was experiencing, why, and what I could do to alleviate the symptoms. I cannot recommend Dr Boon Lim more highly! I have also found his online content to be very informative and helpful.
16th March 2024
Written by a private patient
Dr Boon Lim understood my AF condition quickly and recommended immediate treatment without any hesitation. The surgery has given me a new lease of life and I can't thank Dr Boon Lim enough. I would highly recommend his services.
8th July 2023
Written by a private patient
I have seen Dr Boon Lim a number of times since 2019 regarding my heart health, syncope and AF. He has always explained things in a clear manner and taken the time to listen. He has a holistic approach and has advised on how to make effective and achievable lifestyle changes. I have also found his book 'Keeping Your Heart Healthy' an easy and informative read. I would have no hesitation in recommending his care and expertise.
31st May 2023
Written by a private patient
Dr Lim reassured my 21 year old son with his calm, patient and professional manner. He explained in detail the treatment plan and procedures that he put in place. He and his team made whole process smooth at an anxious time. After a successful procedure my son can resume his competitive sporting activities. We can’t thank him enough.
5th May 2021
Written by a private patient
He is both excellent at listening and explaining. his manner is assured but warm. I never sensed that my consultations had been in any way hurried
30th March 2021
Written by a private patient
I saw Dr Boon Lim at the end of 2020 on the recommendation of another cardiologist, as I needed a pacemaker and my first cardiologist suggested that Dr Boon Lim was the absolute best in class. I can honestly say I felt looked after and listened to every step of the way during my treatment. I was also incredibly impressed at Dr Boon Lim’s holistic approach to my healthcare, which has resulted in me making some fundamental changes to my lifestyle and having further conversations with an endocrinologist. I would have no hesitation in recommending Dr Boon Lim for any cardiology issues.
27th February 2021
Written by a private patient
I’m a 69 year old man. I have had Atrial Flutter for a few years and it has increasingly been affecting me, and how I felt with exercise. Some shortness of breath and anxiousness associated with the arrhythmia. I was lucky enough to have Dr Lim and his team give me an ablation. Professional painless and wow, I now feel great. Dr Lim really knows what he is doing. Thanks to all
14th August 2020
Written by a private patient
He is very skilled in what he does and explains everything very clearly .
14th August 2020
Written by a private patient
I have suffered with what was termed as anxiety and a fast heart rate for years. I have seen countless cardiologists before Dr Boon Lim but no one really got to the bottom of it. Dr Boon Lim quickly ascertained that I was likely suffering with a fast heart and anxiety because of blood pooling in my legs and the resulting activation of my nervous system. He explained everything very carefully to me and gave me specific advice to help mitigate the effects. Dr Boon Lim is a very caring and supportive Dr and since receiving his reassurance and putting into practice his advice, I have felt so much better. Dr Lim is extremely knowledgeable and uses very up to date testing methods, such as the zip patch 14 day heart monitor. This allowed Dr Lim to confirm that I did not have any other heart rhythm disturbance. I really can not recommend him highly enough and my experience has been life changing.
3rd August 2020
Written by a private patient
Wow! Doctor Lim, What an amazing Doctor and what an amazing human being. After my Cardiac arrest in November 2019, the prospect of getting an ICD Installed was very daunting for me. With other health issues. and a very Anxious person by nature, I am very weak facing these things, and get extremely stressed. Doctor Lim, after speaking to me very soon realised what sort of person I am and absolutely went out of his way , spending a great deal of time talking to me, not only about the Medical side of an ICD and how it all works, but so patiently and passionately with great empathy converted me into a confident, now knowledgeble patient who with great courage accepted and then got my ICD Installed. I am 65 years old and have never ever , met a Doctor who was not just a doctor with great experience and know how , but had the incredible skills to give me his precious time and expert advise . My wife who was listening to our conversation , is so so impressed that , she had tears in her eyes, as before Doctor Lim spoke to me , I was stressing her out, with my Anxieties, and Doctor Lim fixed that. Dear Doctor Lim, I and my family thankyou very very much and are very grateful. Look forward to see you or one of your team , in clinic, or phone consultation, if possible for my Post ICD Installation follow up clinic on Wednesday 1 July 2020, around 15.30. best wishes and best regards Mr Bharat sharma CC227916
29th June 2020
Written by a private patient

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