About Dr Boon Lim

Top Rated Doctor in UK

Dr. Boon Lim is an experienced leading London Cardiologist with a passion and specialist interest in syncope and arrhythmia.

Dr Boon Lim was Voted Top Doctor in Cardiology in 2017 by his peers and awarded a certificate of excellence for care provision by patients in 2018. Dr Boon Lim was again awarded Top Doctor of the year in 2018, and 2021 for cardiology, making it the three years that Dr Lim has been awarded this accolade voted by physician peers across the UK.

About Dr. Boon Lim

Dr Boon Lim is an experienced Consultant Cardiologist and Cardiac Electrophysiologist. Boon Lim is considered one of the best cardiologist in London, UK. He is the clinical lead for the nationally-renowned Imperial Syncope Diagnostic Service based at Hammersmith Hospital London. He has experience in reporting and reviewing over 8000 tilt table tests, and has one of the largest volume practices in London and the UK for patients with syncope based the Imperial Syncope Diagnostic Unit, with the team reviewing over 1000 patients each year, often with difficult-to-treat syncopal symptoms.

He has many years of experience as a cardiac electrophysiologist, working in a heavy-volume centre of excellence in Electrophysiology, and has performed over 1800 electrophysiology and ablation procedures, and further supervised and taught

Dr. Boon Lim - Best Cardiologist in London UK

his registrars on over 2000 procedures, making him one of the most experienced cardiologists in electrophysiology and ablation in the UK. He is invited to speak at National and International meetings to share his experience particularly in challenging procedures, including complex 3D mapping of atrial tachycardias and atrial fibrillation (AF).

He is specialization highly complex ablations for recurrent atrial tachycardia and persistent atrial fibrillation (AF), using state-of-the-art 3 Dimensional Mapping Technology such as Carto, Rhythmia, Precision, Cardioinsight and Cryoablation.

He has performed over 800 pacemaker and complex device implantations, including defibrillators. He has a keen interest in training junior doctors and has guided them to implant over 1200 devices.

top doctor award 2017                Dr lim reviews                london cardiovascular clnic        bupa caridologist.


Education and Training in Top Institutions

Universitiy of Cambridge

Dr Boon Lim attends medical school at Gonville and Caius College, Cambridge University in 1995, and graduated with double-first class honours, winning numerous scholarships including the Michelle Prize for Medicine and the Hoechst Roussel Prize. After completing his medical degree in Cambridge, Dr Lim trained in prestigious rotations, including top London Rotations based at Kings College Hospital, and Oxford University Rotations, before completing his PhD at Imperial College London studying the role of the autonomic nervous system in atrial fibrillation in 2010. He conducted his electrophysiology training in high-volume excellent hospitals in London, including St Mary’s Hospital, and the Heart Hospital in central London. He also took time to train briefly at international centres of excellence at University Hospital Bordeaux, as well as University Hospital Hamburg, to gain experience in ablation for atrial fibrillation (AF).

He returned to Imperial College Healthcare to lead the Imperial Syncope Diagnostic Unit in 2011, growing this unit and expanding its research productivity and is recognised as a national expert in Syncope. Referrals are frequently made from other tertiary centres to the Imperial Syncope Diagnostic Unit for patients who are highly symptomatic, who continue to suffer from syncope which is difficult to treat. He teaches regularly at junior doctor and GP training events across the UK, to share his knowledge about the best methods for treating syncope.

Imperial College London



Dr Boon Lim is considered one of the best lecturers and trainers and is invited to lecture annually at the British Heart Rhythm Society Conference on both the patient education days, as well as the training sessions for other doctors. Dr Lim has a candid and open way of sharing his experiences in the clinic, and explains things clearly and concisely and is often rated very highly in the quality and delivery of his lectures.

Dr Boon Lim also trains junior doctors in syncope, arrhythmia and procedures, including complex ablation and pacing procedures. He lectures annually at the British Junior Cardiologists’ Association on syncope and pacemaker therapy to over 100 registrars from UK and Europe and is frequently invited to lecture both nationally and internationally on Syncope and Atrial Fibrillation. He is passionate about learning, as well as teaching, and considers that everyone should be “learning something new every day!”


He is passionate about research in syncope, and understanding the best methods for treating Atrial Fibrillation. He has authored over 60 peer-reviewed publications and has presented over 200 at National and International meetings worldwide. He was appointed Honorary Senior Lecturer at the prestigious Imperial College London, where he is the Principal Investigator for over 6 trials, including trials in understanding mechanisms to Syncope and atrial fibrillation (AF) and developing novel methods and best techniques to successfully treat these conditions.

Dr Lim has active research interests in several different fields, with a particular interest in developing the most effective treatment methods for patients with syncope and atrial fibrillation. The list below is a summary of Dr Lim’s research and publications since 2015, but please see his full publication and research profile on links below:



If you’d like to be seen by Dr Lim, please call us or contact us on the link below

Research in Syncope

NoPublication year:Title:Link:
1:2021Be Careful What You Swallow": A Case Series of Swallow Syncope.https://pubmed.ncbi.nlm.nih.gov/34317560/
2:2021Orthostatic hypotension in older people: considerations, diagnosis and management.https://pubmed.ncbi.nlm.nih.gov/34001585/
3:2021Understanding the future research needs in Postural Orthostatic Tachycardia Syndrome (POTS): Evidence mapping the POTS adult literature.https://pubmed.ncbi.nlm.nih.gov/33901811/
4:2021Tilt testing remains a valuable asset.https://pubmed.ncbi.nlm.nih.gov/33624801/
5:2021Autonomic dysfunction in 'long COVID': rationale, physiology and management strategies.https://pubmed.ncbi.nlm.nih.gov/?term=lim-pb&sort=date&page=2
6:2019Cardioneuroablation: Present status as a tenable therapy for vasovagal syncope.https://www.ncbi.nlm.nih.gov/pubmed/30628895
7:2018Predicting Vasovagal Syncope from Heart Rate and Blood Pressure: A Prospective Study in 140 Subjects.https://www.ncbi.nlm.nih.gov/pubmed/29715516
8:20182018 ESC Guidelines for the diagnosis and management of syncope.https://www.ncbi.nlm.nih.gov/pubmed/29562304
9:2016Diagnostic role of head-up tilt test in patients with cough syncope.https://www.ncbi.nlm.nih.gov/pubmed/26787669
10:2016A long-term follow-up of patients with prolonged asystole of greater than 15s on head-up tilt testing.https://www.ncbi.nlm.nih.gov/pubmed/26547742
11:2014Diagnostic algorithm for syncope.
12:2014Ivabradine in treatment of sinus tachycardia mediated vasovagal syncope.

Dr Boon Lim's Research in Atrial Fibrillation and Complex Mapping of Arrhythmia

NoPublication year:Title:Link:
1:2022Ectopy-triggering ganglionated plexuses ablation to prevent atrial fibrillation: GANGLIA-AF study.https://pubmed.ncbi.nlm.nih.gov/34915187/
2:2021Classification of Fibrillation Organisation Using Electrocardiograms to Guide Mechanism-Directed Treatments.https://pubmed.ncbi.nlm.nih.gov/34858198/
3:2021Cycle Length Evaluation in Persistent Atrial Fibrillation Using Kernel Density Estimation to Identify Transient and Stable Rapid Atrial Activity.https://pubmed.ncbi.nlm.nih.gov/34453278/
4:2021Single Ectopy-Triggering Ganglionated Plexus Ablation Without Pulmonary Vein Isolation Prevents Atrial Fibrillationhttps://pubmed.ncbi.nlm.nih.gov/34317098/
5:2021RETRO- MAPPING: A New Approach to Activation Mapping in Persistent Atrial Fibrillation Reveals Evidence of Spatiotemporal Stability.https://pubmed.ncbi.nlm.nih.gov/33999670/
6:2021Targeting the ectopy- triggering ganglionated plexuses without pulmonary vein isolation prevents atrial fibrillation.https://pubmed.ncbi.nlm.nih.gov/33421265/
7:2021Left Atrial Enhancement Correlates With Myocardial Conduction Velocity in Patients With Persistent Atrial Fibrillation.https://pubmed.ncbi.nlm.nih.gov/33304272/
8:2021"Granger Causality-Based Analysis for Classification of Fibrillation Mechanisms and Localization of Rotational Drivers".https://pubmed.ncbi.nlm.nih.gov/32809880/
9:2020The ectopy- triggering ganglionated plexuses in atrial fibrillation.https://pubmed.ncbi.nlm.nih.gov/32769021/
10:2020Anatomical Distribution of Ectopy-Triggering Plexuses in Patients With Atrial Fibrillation.https://pubmed.ncbi.nlm.nih.gov/32718187/
11:2019Ripple-AT Study.https://www.ncbi.nlm.nih.gov/pubmed/31394921
12:2019Evaluation of a new algorithm for tracking activation during atrial fibrillation using multipolar catheters in humans.https://www.ncbi.nlm.nih.gov/pubmed/31211473
13:2019Voltage during atrial fibrillation is superior to voltage during sinus rhythm in localizing areas of delayed enhancement on magnetic resonance imaging: An assessmenthttps://www.ncbi.nlm.nih.gov/pubmed/31170484
14:2018Outcomes of paroxysmal atrial fibrillation ablation studies are affected more by study design and patient mix than ablation technique.https://www.ncbi.nlm.nih.gov/pubmed/30230101
15:2018Analytical approaches for myocardial fibrillation signals.https://www.ncbi.nlm.nih.gov/pubmed/30025847
16:2018Isthmus sites identified by Ripple Mapping are usually anatomically stable: A novel method to guide atrial substrate ablation?https://www.ncbi.nlm.nih.gov/pubmed/29341322
17:2017High-Density Electroanatomical Mapping to Identify Point of Epicardial to Endocardial Breakthrough in Perimitral Flutter.https://www.ncbi.nlm.nih.gov/pubmed/29759439
18:2017The sawtooth EKG pattern of typical atrial flutter is not related to slow conduction velocity at the cavotricuspid isthmus.https://www.ncbi.nlm.nih.gov/pubmed/28833757
19:2017Cavotricuspid-Isthmus Dependent Flutter or Left-Sided Atrial Tachycardia?https://www.ncbi.nlm.nih.gov/pubmed/28756424
20:2017Microreentrant left atrial tachycardia circuit mapped with an ultra-high-density mapping system.https://www.ncbi.nlm.nih.gov/pubmed/28491807
21:2017Spatial Resolution Requirements for Accurate Identification of Drivers of Atrial Fibrillation.https://www.ncbi.nlm.nih.gov/pubmed/28500175

Research in Other Subjects

NoPublication year:Title:Link:
1:2022ECG-based real-time arrhythmia monitoring using quantized deep neural networks: A feasibility study.https://pubmed.ncbi.nlm.nih.gov/35091363/
2:2022Left ventricular activation time and pattern are preserved with both selective and nonselective His bundle pacing.https://pubmed.ncbi.nlm.nih.gov/34667958/
3:2021A Multicenter External Validation of a Score Model to Predict Risk of Events in Patients With Brugada Syndrome.https://pubmed.ncbi.nlm.nih.gov/34610873/
4:2021Postinfarct ventricular tachycardia substrate: Characterization and ablation of conduction channels using ripple mapping.https://pubmed.ncbi.nlm.nih.gov/34004345/
5:2021Electroanatomic Characterization and Ablation of Scar-Related Isthmus Sites Supporting Perimitral Flutter.https://pubmed.ncbi.nlm.nih.gov/33516707/
6:2021A New Era in Epicardial Access for the Ablation of Ventricular Arrhythmias: The Epi-Co2 Registry.https://pubmed.ncbi.nlm.nih.gov/33478716/
7:2021Non-invasive detection of exercise- induced cardiac conduction abnormalities in sudden cardiac death survivors in the inherited cardiac conditions.https://pubmed.ncbi.nlm.nih.gov/33083839/
8:2021Within-patient comparison of His-bundle pacing, right ventricular pacing, and right ventricular pacing avoidance algorithms in patients with PR prolongation: Acute hemodynamic study.https://pubmed.ncbi.nlm.nih.gov/32976636/
9:2019Quantification of Electromechanical Coupling to Prevent Inappropriate Implantable Cardioverter-Defibrillator Shocks.https://www.ncbi.nlm.nih.gov/pubmed/31221358
10:2019Ventricular conduction stability test: a method to identify and quantify changes in whole heart activation patterns during physiological stress.https://www.ncbi.nlm.nih.gov/pubmed/30820561
11:2019Prevalence of spontaneous type I ECG pattern, syncope, and other risk markers in sudden cardiac arrest survivors with Brugada syndrome.https://www.ncbi.nlm.nih.gov/pubmed/30569504
12:2019His Resynchronization Versus Biventricular Pacing in Patients With Heart Failure and Left Bundle Branch Block.https://www.ncbi.nlm.nih.gov/pubmed/30545450
13:2018Distinct impacts of heart rate and right atrial-pacing on left atrial mechanical activation and optimal AV delay in CRT.https://www.ncbi.nlm.nih.gov/pubmed/29856077
14:2018Repolarization abnormalities unmasked with exercise in sudden cardiac death survivors with structurally normal hearts.https://www.ncbi.nlm.nih.gov/pubmed/29091329
15:2018Atrioventricular Optimized Direct His Bundle Pacing Improves Acute Hemodynamic Function in Patients With Heart Failure and PR Interval Prolongation Without Left Bundle Branch Block.https://www.ncbi.nlm.nih.gov/pubmed/29759412
16:2018Mapping Signatures of Ventricular Ectopic Activity of Endocavitary Origin.https://www.ncbi.nlm.nih.gov/pubmed/29759393
17:2017Reconstruction of non-error magnetic hologram data by magnetic assist recording.https://www.ncbi.nlm.nih.gov/pubmed/28993640
18:2017Basic life support education in secondary schools: a cross-sectional survey in London, UK.https://www.ncbi.nlm.nih.gov/pubmed/28062467
19:2016The changing face of cardiovascular disease 2000-2012: An analysis of the world health organisation global health estimates data.https://www.ncbi.nlm.nih.gov/pubmed/27664572
20:2016A Prospective Study of Ripple Mapping the Post-Infarct Ventricular Scar to Guide Substrate Ablation for Ventricular Tachycardia.https://www.ncbi.nlm.nih.gov/pubmed/27307519
21:2015A technique for visualising three-dimensional left atrial cardiac activation data in two dimensions with minimal distance distortion.https://www.ncbi.nlm.nih.gov/pubmed/26737976

Research into the Autonomic Nervous System

NoPublication year:Title:Link:
1:2022Ectopy-triggering ganglionated plexuses ablation to prevent atrial fibrillation: GANGLIA-AF study.https://pubmed.ncbi.nlm.nih.gov/34915187/
2:2021Single Ectopy-Triggering Ganglionated Plexus Ablation Without Pulmonary Vein Isolation Prevents Atrial Fibrillationhttps://pubmed.ncbi.nlm.nih.gov/34317098/
3:2021Targeting the ectopy- triggering ganglionated plexuses without pulmonary vein isolation prevents atrial fibrillation.https://pubmed.ncbi.nlm.nih.gov/33421265/
4:2020The ectopy- triggering ganglionated plexuses in atrial fibrillation.https://pubmed.ncbi.nlm.nih.gov/32769021/
5:2020Anatomical Distribution of Ectopy-Triggering Plexuses in Patients With Atrial Fibrillation.https://pubmed.ncbi.nlm.nih.gov/32718187/
6:2018A novel approach to mapping the atrial ganglionated plexus network by generating a distribution probability atlas.https://www.ncbi.nlm.nih.gov/pubmed/30168232
7:2016Ablation therapy for left atrial autonomic modification.https://www.ncbi.nlm.nih.gov/pubmed/27595199
8:2015Dissociated pulmonary vein potentials: Expression of the cardiac autonomic nervous system following pulmonary vein isolation?https://www.ncbi.nlm.nih.gov/pubmed/26949598
9:2015The left atrial neural network: more complicated than we thought?https://www.ncbi.nlm.nih.gov/pubmed/26021626
10:2013Characterization of the left atrial neural network and its impact on autonomic modification procedures.https://www.ncbi.nlm.nih.gov/pubmed/23580743
11:2016Feasibility of multiple short, 40-s, intra-procedural ECG recordings to detect immediate changes in heart rate variability during catheter ablation for arrhythmias.https://www.ncbi.nlm.nih.gov/pubmed/21647641

We promised to provide excellent care… and delivered

Testimonial for Dr. Boon Lim

  • Dr Lim gives the patient great confidence that he is getting the right advice and treatment which is delivered with the highest professional standards. You know you are in the hands of a very skilled and highly qualified physician who is at the forefront of scientific development in his field.
    Mary Rose Treated for 2 weeks
  • Dr. Boon Lim is an outstanding consultant cardiologist. He diagnosed that I required a dual chamber pacemaker back in July, and has just discharged me, after I told him the procedure has given me a new lease of life. I thanked him for his attentiveness, politeness and care.

    Lilian Jones Visitor
  • A thoughtful, considered, unhurried and engaged consultation was really appreciated and left me feeling very reassured.

    Lemon Trevor X Patient