Dr Alex Sirker


Qualifications: MA (Cantab), MB BChir, MRCP, PhD

Medical interests: Interventional Cardiology (including coronary angiography, angioplasty and stenting, and assessment of coronary artery disease using intravascular imaging and fractional flow reserve).

General Adult Cardiology – Investigation of symptoms such as chest pains, breathlessness, palpitations, dizziness and faints. Also longer term management of chronic heart conditions such as coronary artery disease, heart valve diseases, high blood pressure and heart failure.



My clinical practice involves a combination of General Cardiology consultation work and Interventional Cardiology procedures. In the clinic, I see patients who present with a variety of symptoms that may relate to the heart. I am able to offer them an opportunity to discuss their concerns and (where appropriate) the judicious use of investigations in a timely manner. If a heart-related condition is identified, I am able to plan and coordinate ongoing care and treatment if this is needed, whether it be inpatient or (more usually) outpatient based. My additional area of special expertise within Cardiology is the care of patients with coronary artery disease. I perform coronary angiography, to study the heart’s arteries and, where it is suitable, am able to treat disease in these arteries using angioplasty (ballooning) and stenting, to relieve symptoms and improve quality of life.


I have had extensive training and clinical experience in all aspects of general adult cardiology.

Symptoms and conditions that I investigate and manage include:

  • Chest pain
  • Breathlessness
  • Palpitations
  • Faints and blackouts
  • Dizziness
  • Coronary artery disease
  • Heart failure
  • Heart valve diseases
  • High blood pressure (hypertension)
  • Heart rhythm disturbances (arrhythmias)
  • Cardiac assessment prior to non-cardiac surgery
  • Cardiovascular risk evaluation

Procedures which I undertake or report/interpret include:

  • Electrocardiography (ECG)
  • Transthoracic and transoesophageal echocardiography (“Echo”)
  • Ambulatory Holter (ECG) monitoring
  • Ambulatory BP monitoring
  • Exercise stress testing
  • Coronary angiography
  • Coronary angioplasty and stenting
  • Intravascular ultrasound
  • Optical coherence tomography }
  • Pressure wire assessment }
  • Right and left heart catheterization } to assess coronary artery disease
  • Intraaortic balloon pump insertion and the outcomes of stenting
  • Temporary pacemaker insertion
  • Pericardiocentesis

Research Expertise:

Left ventricular remodeling after myocardial infarction (how the heart adapts after a heart attack and how this may predispose to later heart failure)

Determinants of outcome after PCI (percutaneous coronary intervention i.e. angioplasty and stenting) in emergency settings and how outcomes might be further improved


I trained in undergraduate medicine at the University of Cambridge, where I gained a First Class Honours Degree in Physiology in 1994 and won a number of awards, prizes and scholarships. I progressed to clinical training, also at the University of Cambridge, and passed final MB examinations (to qualify as a doctor) with triple University Distinctions.

My cardiology training has been undertaken at a number of leading London Hospitals including Harefield, the Royal Brompton, Guys and St Thomas' and King's College Hospitals. My specialist training in invasive and interventional cardiology was gained both in London and during a year-long fellowship at a leading cardiology unit in British Columbia, Canada. Additionally, I have formal national accreditation in echocardiography.

I have a busy NHS practice as a Consultant Cardiologist at University College London Hospitals and St Bartholomew's Hospital, where I am involved in both General and Interventional Cardiology. I have led a number of quality improvement projects, including restructuring of the General Cardiology outpatient clinic to improve patient experience.
Alongside this, I have considerable research experience, including a PhD gained at King's College London. I maintain a number of active research interests, including acting as a Principal Investigator in multi-centre clinical trials studying ways to improve outcomes in coronary artery disease.

I publish in leading cardiovascular journals and am a member of the Research Committee of the British Cardiovascular Intervention Society. I act as a reviewer for medical journals, including The Lancet, and am on the editorial committee of the British Journal of Hospital Medicine.

I act as a Lead Tutor at UCL Medical School for an undergraduate learning module centred upon cardiovascular disease and its impact on patients' lives. I am also a lecturer on the national Interventional Cardiology training program for postgraduate doctors.


In clinic
Clinic times*
In clinic: Yes
Clinic times*: On request
In clinic: Yes
Clinic times*: On request
In clinic: Yes
Clinic times*: On request


Dr Alex Sirker: fees

Type of patient Initial Consultation (up to 45 min) Follow Up Appointment (up to 30 min)
Self pay £250 £200
Insured As per schedule of fees for specific insurance companies* As per schedule of fees for specific insurance companies*

* If your policy covers consultations, there will be no shortfall to pay (but you may have an excess on your policy). Please also note that some policies do not cover consultations – always check your policy conditions or contact with your insurer as necessary.

Our temporary opening hours are now from Monday – Friday 08.00 – 20.00


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