• Specialist in: heart rhythm disorders, atrial fibrillation (AF), blackouts, fainting (syncope), PoTS, dizziness, and palpitations
• Best for patients with: unexplained blackouts, fainting episodes, a racing or irregular heartbeat, dizziness on standing, or a new AF diagnosis needing treatment options
• Tests and treatments offered: AF ablation, electrophysiology studies, pacemaker implantation, tilt table testing, ECG, echocardiogram, CT coronary angiography, and remote heart rhythm monitoring
• Available at: Welbeck Heart Health, 1 Welbeck Street, Marylebone, London
• Also: Clinical Lead of the Imperial Syncope Diagnostic Unit; has performed over 2,000 catheter ablations; President's Medal winner from the Royal Society of Medicine; accepts major insurers and self-pay
Dr Boon Lim is a cardiologist and electrophysiologist at Welbeck Heart Health, where he is also a founding member and partner. His specialist areas are heart rhythm disturbances including atrial fibrillation, pacing and syncope.
His innovation and ongoing research into developing new techniques for AF ablation have led him to be widely considered one of the best atrial fibrillation experts and AF ablation specialists in London. As one of the top cardiologists in London for Atrial Fibrillation (AF), having performed over 2000 ablations, he continues to perform >100 ablations for atrial fibrillation per year, and continues to teach registrars in a busy tertiary hospital based at Hammersmith and Imperial College London. He has an active research program studying the role of the autonomic nervous system in AF and syncope.
As the clinical lead for the nationally-renowned Imperial Syncope Diagnostic Unit, Dr Lim has extensive experience in reporting tilt table testing. Dr Lim is committed to developing better and safer techniques to better treat patients with atrial fibrillation and syncope.
“The exemplary patient experience at Welbeck Health is driven by clinician leaders, each an expert in their field who have come together to develop and deliver world-class cardiology care with a seamless patient journey.”
Dr Lim research interests are in mapping and improving catheter ablation techniques for atrial fibrillation, and developing novel strategies to treat vasovagal syncope; improving the quality of life for patients with recurrent blackouts.
Dr Lim has been awarded several prizes for his research, including the top prize President’s Medal for Cardiology at the Royal Society of Medicine, the Lindo Foundation Prize at St Mary’s Hospital, and Runner-up in the Young Investigator Award for the British Cardiovascular Society, and Asia Pacific Heart Rhythm Society Meetings.
Royal Society of Medicine
Royal College of Physicians
Heart Rhythm Society
Medical Advisory Committee for STARS (Syncope Trust and Reflex Anoxic Seizures) Society
Medical Advisory Committee for Arrhythmia Alliance
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Sleep apnoea is recognised as a significant factor in both triggering and maintaining Atrial Fibrillation. This is because over time, repeated apnoeic episodes that occur repeatedly overnight may lead to stress on the heart, which can trigger AF.
From incorporating more healthy fats into your diet to ensuring you get good quality rest, these heart health tips will help you keep your ticker on top form. Written By Dr Boon Lim. Consultant Cardiologist and Electrophysiologist
In an extract from his book, ‘Keeping Your Heart Healthy’, Dr Boon Lim looks at how making changes to your diet and eating habits can make your heart healthier more generally, giving it the fuel it needs to keep it ticking for longer.
Unexplained blackouts can stem from heart rhythm disturbances, vasovagal syncope, or autonomic conditions such as postural orthostatic tachycardia syndrome (PoTS). Dr Lim leads the Imperial Syncope Diagnostic Unit and uses tilt table testing, continuous ambulatory ECG monitoring, and electrophysiology studies to pinpoint the cause. Once diagnosed, he tailors treatment to the specific trigger, which may include lifestyle changes, medication, or a pacemaker.
Catheter ablation is one of the most effective treatments for atrial fibrillation (AF) that has not responded well to medication. Dr Lim has performed over 2,000 ablation procedures and conducts more than 100 each year, including complex redo cases. His research also focuses on developing safer ablation techniques and understanding the autonomic nervous system's role in AF.
Postural orthostatic tachycardia syndrome (PoTS) causes an abnormal increase in heart rate when you stand up, leading to dizziness, fatigue, and sometimes fainting. Dr Lim diagnoses PoTS using tilt table testing and continuous heart rhythm monitoring. Treatment typically combines medication, structured exercise programmes, and fluid and salt management strategies tailored to each patient.
You should consider a specialist review if your dizziness is accompanied by palpitations, chest pain, fainting, or if it occurs consistently on standing. Dr Lim has particular expertise in cardiac causes of dizziness and vertigo, using advanced diagnostics such as electrophysiology studies and remote heart rhythm monitoring to distinguish cardiac causes from other conditions.
Dr Lim offers comprehensive heart health screening that can include an ECG, echocardiogram, CT coronary angiography, and CaRi-Heart analysis to assess both heart rhythm and coronary artery health. These tests can detect conditions such as atrial fibrillation (AF), structural heart disease, and coronary artery narrowing before symptoms become serious. Screening is available to self-pay and insured patients.