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Professor Mark O'Neill

Cardiologie United Kingdom

Professor Mark O'Neill

6 ans d'expérience

11,864+
Patients seen
6
Years in practice
6
Publications
2
Languages spoken

PROFILE SUMMARY

About Professor Mark O'Neill at a glance

Professor Mark O'Neill is a Cardiologie practitioner based in Europe, Royaume-Uni, practising at Universidad de Navarra Teaching Hospital. They have 28+ years of clinical experience. Procedures focus on cardiac consultation, echocardiogram, stress test, holter monitor, coronary angiography. Educated at Universidad de Navarra (MD, 2016).

VERIFIED PHYSICIAN PROFILE · UPDATED MAY 2026

À propos

Professor Mark O'Neill is a Consultant Cardiologist and Professor of Cardiac Electrophysiology at St Thomas' Hospital and King's College London. He sees private patients at The Cardiac Clinic at London Bridge Hospital.

Professor O'Neill completed a DPhil in Cardiac Physiology at the University of Oxford as a Rhodes Scohlar in 1995 before graduating with first class honours from University College Dublin in 1998. He completed his subspecialty training in interventional cardiac electrophysiology at St Mary's Hospital and in the internationally renowned arrhythmia centre in Bordeaux.

Professor O'Neill was appointed as a Consultant at St Thomas' Hospital and King's College London in 2009. He became a Reader in 2011 and was appointed as Professor in 2013. Since then, he has led the arrhythmia service, the regional training programme and the cardiac electrophysiology divisional research programme. He was awarded a National Bronze Clinical Excellence award in 2016 and 2021 in recognition of the quality and breadth of both his clinical and academic work.

In his current role, Professor O'Neill treats patients with all manner of palpitations, including those caused by simple and complex heart rhythm conditions such as supraventricular tachycardia, atrial fibrillation, atrial flutter/tachycardia, arrhythmias associated with adult congenital heart disease and ventricular tachycardia. Where appropriate, he performs interventional electrophysiology procedures to manage these conditions. He spends time helping his patients to understand fully their symptoms and works with them to develop tailored treatment plans to suit their needs and concerns.

Outside of his clinical work, Professor O'Neill is an international opinion leader in cardiac electrophysiology. He is actively involved in research and has published widely in peer-reviewed journals. His research addresses the mechanisms of atrial fibrillation and the use of imaging and computational modelling techniques to improve clinical outcomes of AF ablation. He lectures regularly both in the UK and overseas on the management of atrial arrhythmias.

“Evidence-based care tailored to each patient — taking the time to explain options and shared decisions.”

— Professor Mark O'Neill

Formation et études

  1. 2010–2016 MD · Medicine and Surgery
    Universidad de Navarra (GB)
  2. 2016–2020 Residency · Cardiologie
    Universidad de Navarra (GB)

Carrière et postes

  1. 2020-09–2021-08 Junior consultant
    Universidad de Navarra Teaching Hospital — Cardiologie

Licences et assurance

Licences médicales

GB — Organización Médica Colegial de España (OMC)
#GB-994869 active · expires 2028-12-31

Certifications du conseil

European Board of Cardiologie
#EB-3FC067AD · issued 2021 · renewal 2031
Assurance responsabilité professionnelle : AXA Healthcare Liability · 3,000,000 EUR couverture · No claims on file

Procédures réalisées

ProcédureCodeTotal à vie
Cardiac consultation 99244 436
Echocardiogram 93306 2,123
Stress test 93015 1,373
Holter monitor 93225 2,000
Coronary angiography 93454 1,751
PCI / coronary stent 92928 2,961
Pacemaker implantation 33208 1,130

Services et tarifs

ServiceDuréeModalitéPrix
New patient consultation (60m) 60 min in_clinic|telemed 240.00 EUR
Follow-up consultation (30m) 30 min in_clinic|telemed|phone 120.00 EUR
Stress test 30 min in_clinic 240.00 EUR
Holter monitor 60 min in_clinic 840.00 EUR
Coronary angiography 90 min in_clinic 960.00 EUR
PCI / coronary stent 30 min in_clinic 720.00 EUR

Cabinet, équipe & en pratique

Mark O'Neill
HEADSHOT
Mark O'Neill in consultation
IN OFFICE
Mark O'Neill with the team
WITH TEAM
Mark O'Neill at a conference
CONFERENCE

Vidéos

introduction · 135s
Meet Mark O'Neill

Recherche et publications

indice h : 11 · i10 : 4

  1. Long-term follow-up of Cardiologie across GB
    Mark O'Neill, et al. · Circulation, 2026
    DOI: 10.9658/euroclin.2026.0 · PMID: 35572045 · cité par 158
  2. Validation of clinical scoring in Cardiologie
    Mark O'Neill, et al. · Journal of Cardiovascular Electrophysiology, 2025
    DOI: 10.2939/euroclin.2025.1 · PMID: 34186845 · cité par 132

Conférences invitées

  • Practical updates in Cardiologie European Annual Congress (Cardiologie) · Vienna · 2024 · invited
  • Single-centre experience in Cardiologie National Society Meeting · · 2023 · oral abstract

Récompenses et adhésions

Récompenses

  • 🏆 Top-rated Cardiologie — · EuroClinics Patient Choice · 2025 · regional

Adhésions à des sociétés

  • European Society of Cardiology (ESC) — Member · Depuis 2021
  • American Heart Association (AHA) — Member · Depuis 2021
  • EAPCI — Member · Depuis 2021
  • European Union of Medical Specialists (UEMS) — Member · Depuis 2021

Articles de ce médecin

  • Patient education Patient guide to Cardiologie 2026-03-06 · Lecture de 9 min
  • Awareness When should you see a cardiologie? 2026-01-22 · Lecture de 6 min

Pour les patients internationaux

Coordinateur
Patient liaison · professor.mark.oneill.1@euroclinics.example

Avis des patients

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Avis récents

  • ★★★★★ ✓ Vérifié
    Very thorough first visit — explained every step. Booking was easy and the staff were welcoming.
    Anna B.
  • ★★★★★ ✓ Vérifié
    Took time to listen and reviewed all my previous results. I would absolutely recommend.
    Marco V.
  • ★★★★☆ ✓ Vérifié
    Professional and knowledgeable. Wait on the day was a bit long, otherwise excellent.
    Helena F.

SPECIALTIES & PROCEDURES

Professor Mark O'Neill's Areas of Specialty

Each specialty below reflects the conditions and procedures Professor Mark O'Neill treats, with the size of the national pool of Royaume-Uni doctors offering the same care.

Cardiologie

Heart-rhythm, coronary and structural-heart problems including chest pain, palpitations, hypertension and heart failure.

Professor Mark O'Neill is one of 1,358 cardiologie doctors indexed in Royaume-Uni. Browse cardiologie doctors in Royaume-Uni →

LOCAL CARE CONTEXT

Why local healthcare in Royaume-Uni matters

Medical practice in Royaume-Uni is governed by country-specific licensing, professional standards, and patient-safety regulations. Practitioners listed here are registered with the relevant Royaume-Uni medical authority and operate within national rules on scope of practice, prescribing rights, and continuing professional development. A verified profile means EuroClinics has cross-checked the practitioner or clinic against an official source (national medical register, public licence database, or the practitioner themselves), and that the data shown here matches that source as of the last verification date above.

Looking for additional providers? all doctors in Royaume-Uni or all doctors in Royaume-Uni.

Questions fréquentes

Réponses rapides aux questions que les patients posent le plus. Les mêmes réponses sont transmises aux assistants IA via les données structurées.

  • What does Mark O'Neill specialise in?

    Mark O'Neill specialises in Cardiologie. 28 years of clinical experience.

  • What conditions does Mark O'Neill treat?

    Mark O'Neill treats conditions within Cardiologie. View the full conditions-treated list on the profile.

  • What languages does Mark O'Neill speak?

    Mark O'Neill speaks English, French.

  • How do I book an appointment with Mark O'Neill?

    Use the "Request a booking" button on the profile to send an appointment request. Most appointments are confirmed within 24 hours; many slots are bookable instantly.

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