Top Heart Doctor - Cardiologist

Dr Cheong is well-positioned to help with your heart:- Chest discomfort | Palpitation | Breathlessness | Dizziness | Fainting | Tiredness | High blood pressure | High cholesterol | Family history of heart disease | Ongoing heart monitoring | Recovery care from heart disease | Heart screening | Disease prevention | Obtaining a second opinion

Remote, or in-person appointments in Essex, Kent and London.

Aims to provide an appointment within 24 hours of Booking Request.

Dr. Jun Cheong, MBChB, FRCP, FSCMR - Consultant Cardiologist

Dr. Jun Cheong is a distinguished Consultant Cardiologist with an illustrious career spanning over two decades in the NHS, dedicated to providing exceptional cardiovascular care to patients. Dr. Cheong has amassed invaluable experience, treating a myriad of cardiac conditions with compassion and expertise. With a patient-centered approach, Dr. Cheong has attended to thousands of individuals presenting with various heart symptoms, including:

- chest discomfort

- palpitations, dizziness

- faints

- breathlessness

Understanding the importance of thorough investigation, he ensures that each symptom is meticulously assessed, recognizing that timely and accurate diagnosis is paramount for optimal management outcomes.

Based in London, Kent, and Essex, Dr. Cheong practices as a highly-regarded consultant cardiologist and cardiac diagnostic imaging specialist. Specializing in advanced cardiac imaging techniques such as echocardiography, cardiac CT, and cardiac MRI, he offers unparalleled expertise in diagnosing and treating a spectrum of conditions, including:

- high blood pressure / hypertension

- high cholesterol / hypercholesterolaemia

- irregular heart rhythm / arrhythmia

- heart failure / cardiomyopathy

- heart valve disease / valvular heart disease

- heart artery disease / coronary heart disease

Dr. Cheong's commitment to excellence is reflected in his accreditation and recognition from esteemed cardiovascular societies across the UK, USA, and Europe. His credentials include Cardiac MRI accreditation - Society of Cardiovascular Magnetic Resonance - the USA, Echocardiography accreditation - European Association of Cardiovascular Imaging - Europe, and Cardiac CT accreditation - British Society of Cardiovascular Imaging - United Kingdom. Additionally, he is registered as a General Cardiology Specialist - registration with General Medical Council - United Kingdom.

Operating in both NHS and private hospitals, Dr. Cheong delivers top-quality care at renowned institutions including:


Lyca Health in Canary Wharf

King's College London in central London

Guy's and St Thomas' Hospital in central London

Queen Mary Hospital, in Sidcup


Darent Valley Hospital in Dartford, Kent

Lyca Health in Orpington, Kent

KIMS Hospital in Maidstone, Kent

Dr. Cheong advocates for preventive care, emphasizing the importance of health screening and disease prevention. Through comprehensive clinical assessments and multi-modality imaging, he guides patients on their healthcare journey, from prevention to accurate diagnosis, management, and long-term follow-up. With Dr. Jun Cheong, patients can trust in his expertise, dedication, and unwavering commitment to diagnosing and managing their heart conditions with the utmost care and proficiency.

Arrange an appointment by clicking on the 'Booking Request' above.

Chest discomfort

Experiencing symptoms of chest discomfort or pain is not only very unpleasant but can be very distressing for you. The symptoms could still originate from the heart even if it was mild or infrequent. Although most chest pain may not be life-threatening nor originate from the heart, it is vitally important that we can establish that. 

You will need to have a thorough clinical history and ECG assessment in the first instance. This may follow by further assessment of the heart to rule out ischaemia (lack of blood supply to the heart), heart valve or pericardial (heart lining) disease with tests such as echocardiography, cardiac CT, stress echocardiography, or cardiac MRI. Early detection of heart-related issues is essential for prompt and effective treatment. Investigating chest pain symptoms can help identify potential cardiovascular problems at an early stage, increasing the likelihood of successful intervention and improved outcomes.

It is recommended that you seek medical advice for a thorough assessment if you have chest pain.

NHS guide on chest pain


Palpitations refer to the awareness of one's own heartbeat, and they often feel like a fluttering, pounding, or rapid sensation in the chest. While palpitations can be caused by various factors, they are commonly associated with heart rhythm irregularities (arrhythmias). If you experience persistent or recurrent palpitations, it is advisable to seek medical evaluation. Your healthcare provider may conduct tests such as electrocardiogram (ECG), Holter monitoring, event monitoring, or stress testing to assess the heart's electrical activity and rule out any underlying conditions.

Seeking medical evaluation allows for a comprehensive assessment of heart health and ensures that any underlying issues are identified and addressed appropriately. If you are experiencing palpitations or have concerns about your heart health, it is advisable to consult with a healthcare professional. One of the most common arrhythmias is atrial fibrillation (around 1.4 million people in the UK have this) which is a common cause of strokes.


Breathlessness is one of the most distressing symptoms. It can be caused by a variety of conditions, and its evaluation requires a comprehensive approach. Seeking timely medical attention is crucial to identify the underlying cause and implement appropriate management strategies to improve breathing and overall well-being. The inability to breathe well, particularly with minimal exertion can be one of the symptoms of heart failure, coronary artery disease, heart valve disease, or heart rhythm abnormalities. If your exercise tolerance has reduced, particularly with leg swelling, an immediate medical opinion should be sought. 

Assessment with Echocardiography, CT, or MRI scan may be recommended depending on the initial clinical assessment.

Dizziness or fainting

Dizziness or feeling faint on standing up can be quite a common symptom that is related to blood pressure fluctuations (postural hypotension). If your symptom of dizziness is persistent, particularly associated with near faints or blackouts, this would require further clinical evaluation. Symptoms of dizziness can be caused by valvular heart disease or life-threatening arrhythmias. 

Identifying the underlying cause is crucial for implementing appropriate treatment and management strategies to alleviate dizziness and improve overall well-being.


Lethargy, fatigue, exhaustion, or general tiredness can be difficult symptoms to investigate due to the wide variety of potential medical causes. This can range from some abnormality in the blood test to more severe causes such as heart failure. Understanding the potential causes of tiredness is important for addressing the underlying issues and improving overall energy levels.

If you feel that your tiredness is not in keeping with your general well-being or fitness level, consider seeking an expert opinion for further assessment.

Heart screening

Health screening is about identifying underlying "silent" heart disease in apparently healthy people before the development of any symptoms. The goal of screening is to detect diseases or conditions early, enabling timely intervention and treatment. Most diseases at their early stages are without any symptoms, but the ability to detect them early will enable prevention intervention to either reverse or reduce the potential complications in later life.

Health screening should be safe, non-invasive, and effective in ruling out the early development of disease. The decision to undergo screening should be informed and consider individual risk factors and preferences. Regular discussions with healthcare providers can help individuals make informed decisions about appropriate screening tests based on their health history and circumstances.

Full recognition by 

all major private medical insurers:

Lyca Health - Canary Wharf

1 Westferry Circus, Canary Wharf, London, E14 4HA

Tel: 01689 490111

KIMS Hospital - Maidstone

Newnham Ct Way, Weavering, Maidstone ME14 5FT 

Tel: 01622 237500

Lyca Health - Orpington

3 New Mill Road, Orpington, Kent, BR5 3TW

Tel: 020 7132 1440