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Professor Mark GallagherCardiology in Chertsey
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Professor Mark Gallagher

Cardiology in Chertsey and Sutton

Top Doctors Awards: 2025
BSc MD FRCPI MB, BCh, BAO
GMC: 4307653

5.017reviewsReview

Expert in:
Atrial fibrillation ablation
Arrhythmia
Cardiac resynchronisation therapy
Defibrillator
Cardiovascular disease
Cardiac arrest
  • Information
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Professional statement

Professor Mark Gallagher is a leading London cardiologist who sees patients at Spire St Anthony's Hospital, BMI The Runnymede Hospital and St George's Hospital NHS Trust, London. He has been the Clinical Lead in electrophysiology at St George's for over ten years and is consistently the busiest electrophysiologist in the region, performing 450-500 procedures yearly. Dr Gallagher's field of particular interest is ablation for atrial fibrillation and other complex atrial arrhythmias.


Professor Gallagher attended medical school and completed basic medical training and initial training in cardiology in Ireland. He later moved to St George's Hospital, London in 1996 to pursue subspecialist training in cardiac electrophysiology and pacing.


Professor Gallagher was a research fellow and later became a registrar and senior registrar at St George's between 1996 and 2002. At the beginning of 2003, Professor Gallagher moved to Rome, Italy where he started an interventional EP unit in the new university hospital "Policlinico Tor Vergata".


Professor Gallagher transferred from Rome to Cardiff in 2007 before returning the following year to St George's Hospital. 

Clinics

The Runnymede Hospital - part of Circle Health Group
  • The Runnymede Hospital - part of Circle Health Group profile image

    The Runnymede Hospital - part of Circle Health Group

    Chertsey, Guildford Street, KT16

    Medical insurances accepted

    I'm paying for myself
    Bupa
    AXA
    AVIVA
    Cigna
    WPA
    Vitality

Credentials

Professional experience

  • 30 years of experience
  • Consultant Cardiologist, St George's Hospital NHS Trust (2008 - present)
  • Consultant Cardiologist, Spire St Anthony's Hospital (present)
  • Consultant Cardiologist, BMI The Runnymede Hospital (present)
  • Ashford and St. Peter’s Hospitals NHS Trust
  • Consultant Cardiologist Electrophysiologist, University Hospital Wales, Cardiff (2007 - 2008)
  • Cardiologist and Chief of Electrophysiology, Policlinico Universitario “Tor Vergata”, Rome, Italy (2003 - 2006)
View more

Subspecialties

  • Cardiac devices
  • Electrophysiology
  • Implantable loop recorder
  • Implantable cardioverter defibrillators (bi-ventricular pacemaker)
  • Lead extraction
  • Pacemakers /pacing
  • Radiofrequency ablation
  • Difficult accessory pathways
  • Implantation of difficult left ventricular leads
  • AF ablation
  • Pacemaker implantation 
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Professional memberships

  • Fellowship of the Royal College of Physicians of Ireland (FRCPI)
  • Membership of the Royal Colleges of Physicians
  • British Heart Foundation
  • Research Fellow in Clinical Cardiology, St. George’s Hospital Medical School
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Education

  • Bachelor of Sciences
  • Doctor of Medicine (1996)
  • MB BCh BAO (1990)
  • Bachelor of Science (1987)
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Publications and conferences

  • Harding I, Bastiaenen R, Khan P, Sharma R, Gallagher MM. EP Image: A fibrillating left atrial appendage during sinus rhythm. JACC: Clinical Electrophysiology 2016;1: in press. (accepted 08/09/2016).
  • Gonna H, Domenichini G, Zuberi Z, Norman M, Kaba R, Roberts D, Gang Y, Grimster A, Gallagher MM. Safety and efficacy of the STSF catheter: case-control comparison to the original SF in the first 100 cases. Europace 2016 (EUPC-D-16-00096R2).
  • Bastiaenen R, Gonna H, Merghani A, Valencia O, Camm AJ, Gallagher MM. The ventricular ectopic QS interval (VEQSI): A potential marker for ventricular arrhythmia in ischaemic heart disease. JACC: Clinical Electrophysiology 2016;1: in press. doi.org/10.1016/j.jacep.2016.0 4.005.
  • Gonna H, Grimster A, Robertson D, Gallagher MM. Concealed conduction in atrial tachyarrhythmia demonstrated in a heartbeat. Heart Rhythm Case Reports 2016. (accepted 31/08/2016).
  • Dhillon PS, Domenichini G, Gonna H, Li A, Sunni N, Mahmoudi M, Gallagher MM. Ventricular Fibrillation Treated by Cryotherapy to the Right Ventricular Outflow Tract: A Case Report.
  • Gonna H, Gallagher MM. Heart Rhythm Issues (book chapter). In: Core Topics in Pre-Operative Anaesthetic Assessment and Management, edited by Drs Crerar-Gilbert and Macgregor. 2016. Cambridge: Cambridge University Press.
  • Domenichini G, Gonna H, Sharma R, Conti S, Fiorista L, Jones S, Arthur M, Adhya S, Jahangiri M, Rowland E, Gallagher MM. Non-laser extraction of pacemaker and ICD leads: a decade of progress. Europace 2016. (DOI 10.1093/europace/euw162).
  • Gonna H, Domenichini G, Conti S, Gomes J, Raju H, Gallagher MM. EP image: Cryoballoon isolation of the Superior Vena Cava. JACC: Clinical Electrophysiology 2016;1: in press (accepted 14/01/16, JEP010316-0003R).
  • Gonna H, Domenichini G, Zuberi Z, Adhya S, Sharma R, Anderson LJ, Beeton I, Dhillon PS, Gallagher MM. Femoral implantation and pull through as an adjunct to traditional methods in cardiac resynchronization therapy. Heart Rhythm 2016; 13:1260-5.
  • Bastiaenen R, Pantazis A, Gonna H, Chis-Ster I, Castelletti S, Batchvarov VN, Domenichini G, Coccolo F, Boriani G, McKenna WJ, Behr ER, Gallagher MM. The ventricular ectopic QRS interval (VEQSI): Diagnosis of arrhythmogenic right ventricular cardiomyopathy in patients with incomplete disease expression. Heart Rhythm 2016; 13:1504-12.
  • Gang Y, Gonna H, Domenichini G, Sampson M, Aryan N, Norman M, Behr ER, Zuberi Z, Dhillon P, Gallagher MM. Evaluation of the Achieve Mapping Catheter in cryoablation for atrial fibrillation: a prospective randomized trial. J Interv Card Electrophysiol 2016; 45:179-87.
  • Gonna H, Domenichini G, Gallagher MM. Successful Transvenous Lead Extraction after a Failed Open Surgical Attempt. Europace 2016 ; 18:130.
  • Raju H, Gomes J, Gonna H, Gallagher MM. EP Image: Cryoballoon Pulmonary Vein Isolation after Lobectomy. JACC: Clinical Electrophysiology 2015;1: 461-462. doi:10.1016/j.jacep.2015.06.006.
  • Marciniak A, Gonsalves M, Gallagher MM. Superior vena cava syndrome after radiofrequency sinus node modification treated with thrombolysis and stent implantation. Europace 2015; 17:37.
  • View Dr Mark Gallagher's publications on ResearchGate.
View more

Prizes and awards

  • Shanahan Prize in Cardiology (1999)

Languages spoken

  • English
Registration number: 4307653

Reviews

All reviews are from real patients and have been verified by our Customer Service department to ensure they meet our guidelines. Rules of the service

17 reviews

5.0

Review this doctor
  • Would you recommend this doctor?
  • Treatment of the doctor
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  • Excellent consultation
    9 January 2026

    M.B.

    Verified patient
  • I found Professor Gallagher to be very competent and reassuring. I’m so pleased he’s looking after me.
    13 May 2025

    M.C.

    Verified patient
  • 22 October 2024

    R.M.

    Verified patient
  • All went smoothly.
    28 September 2024

    M.M.

    Verified patient
  • Can’t think of any criticism to make.
    20 September 2024

    D.M.

    Verified patient
  • As always Dr Gallagher was very professional, he is an excellent cardiologist.
    28 June 2024

    S.H.

    Verified patient
  • Professor Mark was outstanding. In particular, we was clear, succinct and confident. Rebecca, his assistant, was similarly efficient, proactive and responsive. They make a great team and I am reassured and entirely trusting as a result.
    19 March 2024

    S.P.

    Verified patient
  • Professor Gallagher was professional, knowledgeable and very reassuring.
    9 March 2024

    F.A.

    Verified patient
  • 5 January 2024

    R.F.

    Verified patient
  • Professor Mark Gallagher has performed surgical procedure for me and I have no words to express my extreme gratitude for all he had done to me. I am so pleased to be referred to him and already more than a month since I am clearly delighted with the result. I will certainly recommend !
    15 December 2023

    D.K.

    Verified patient
View all reviews

Treatments

The doctor is expert in

Arrhythmia

Atrial fibrillation ablation

Cardiac arrest

Cardiac resynchronisation therapy

Cardiovascular disease

Defibrillator

The doctor also specialises in:

Ambulatory ECG monitoring

Atrial Fibrillation

Brugada syndrome

Cardiac (catheter) ablation

Cardiomyopathy

Cryoablation

Dilated cardiomyopathy

Dizziness

Electrocardiogram

Electrophysiology study

Frequently Asked Questions

What is Professor Mark Gallagher's specialty?

Professor Mark Gallagher is a consultant specialising in Cardiology, with extensive experience in assessing and treating patients within this field.

Which conditions and treatments does Professor Mark Gallagher specialise in?

Professor Mark Gallagher is a cardiologist who provides assessment and treatment for Arrhythmia, Cardiovascular disease, Cardiac resynchronisation therapy, Cardiac arrest, Atrial fibrillation ablation and Defibrillator. During your consultation, you will be informed of the most suitable options following a personalised evaluation.

How many years of experience does Professor Mark Gallagher have?

Professor Mark Gallagher has 30 years of professional experience as a consultant cardiologist, providing specialist assessment and treatment in this medical field.

What do patients say about Professor Mark Gallagher?

Patients give a rating of 5.0 out of 5 to Professor Mark Gallagher, a score considered excellent. This average is based on 17 verified patient reviews, reflecting the experience of those who have attended an appointment.

Are Professor Mark Gallagher's reviews verified?

Yes. All Professor Mark Gallagher's reviews come from verified patients who have attended either an in-person or an e-Consultation appointment. We use a system that ensures authenticity and prevents fake reviews. Some profiles may also display reviews from other platforms, which follow their own verification policies, with the source always clearly indicated.

Where does Professor Mark Gallagher practise?

Professor Mark Gallagher practices in the following locations:

  • Chertsey at Guildford Street
  • Sutton at 801 London Road

In-person consultations are available at these locations as a Cardiology.

How can I book an appointment with Professor Mark Gallagher?

You can book an appointment with Professor Mark Gallagher directly from this page by selecting the time that suits you best. Alternatively, you can call the phone number shown if you prefer personalised assistance.

Does Professor Mark Gallagher see NHS patients?

Many specialists featured on Top Doctors also hold NHS positions. However, appointments arranged for Professor Mark Gallagher through this platform are private, either self-pay or covered by private medical insurance.

Does Professor Mark Gallagher offer private appointments?

Yes, Professor Mark Gallagher offers private appointments for patients seeking flexible and direct access to a consultant cardiologist.

Does Professor Mark Gallagher offer online consultations?

Yes, Professor Mark Gallagher offers online consultations. You can book an appointment directly from this page by selecting the date and time that suit you best. Personalised assistance is also available by calling the number displayed on this page.

Does Professor Mark Gallagher accept insurance?

Professor Mark Gallagher works with the following private medical insurance providers: Bupa, AXA, AVIVA, Cigna, WPA and Vitality. If your insurer is not listed, you may contact the practice directly to confirm your coverage.

What is Professor Mark Gallagher's availability?

Professor Mark Gallagher's availability depends on the appointment slots open at any given time. On this page, you can check current availability, and if no slots are shown, you can request an appointment or contact the practice directly.

What payment methods does Professor Mark Gallagher offer?

You can pay for your consultation with Professor Mark Gallagher using the following methods: Self-paying or Prepaid.

What languages does Professor Mark Gallagher speak?

Professor Mark Gallagher is a cardiologist who offers consultations in English.

How is Professor Mark Gallagher selected to appear on this platform?

All doctors listed on Top Doctors, including Professor Mark Gallagher, undergo our rigorous selection process. Only one in five specialists meets the required standards to be included.
Discover Top Doctors' rigorous medical selection process.
The doctor, or where applicable the hospital or medical centre in which the doctor provides services, undertakes to keep the information relating to the prices of services published on their profile on the Top Doctors platform up to date at all times, ensuring that such prices correspond to those effectively charged to patients. In the event of any discrepancy between the published price and the price ultimately charged to the patient, the doctor and/or the relevant hospital or medical centre shall be solely liable towards the patient and towards Top Doctors for any claim or financial difference arising therefrom.

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The Runnymede Hospital - part of Circle Health GroupChertsey, Guildford Street, KT16
Payment methodSelf-paying
Face-to-faceFirst visit Cardiology
£250
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