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Dr Georgios Karagiannis

Verified Cardiology Hemel Hempstead

Dr Georgios Karagiannis

4 years of experience 5.0 (59 verified reviews)

5,652+
Patients seen
4
Years in practice
11
Publications
4
Languages spoken

PROFILE SUMMARY

About Dr Georgios Karagiannis at a glance

Dr Georgios Karagiannis is a Cardiology practitioner based in Hemel Hempstead, United Kingdom, practising at Universidad Complutense de Madrid Teaching Hospital. They have 24+ years of clinical experience. Procedures focus on cardiac consultation, echocardiogram, stress test, holter monitor, coronary angiography. Educated at Universidad Complutense de Madrid (MD, 2018). Serves patients in Hemel Hempstead, United Kingdom and the surrounding area.

VERIFIED PHYSICIAN PROFILE · UPDATED MAY 2026

About

Dr Georgios Karagiannis is a Consultant specialising in the field of Cardiology. He is currently working at Harefield Hospital within the heart transplant department, where he treats private and NHS patients. He is also working at Hillingdon Hospital within the cardiology department.
He qualified in Medicine at the Aristotle University of Thessaloniki in Greece. He then completed his specialist training in Greece and was awarded ‘excellent' marks on completion. In 2009, he successfully completed his PhD in Cardiology, for which he also received an ‘excellent' mark. Since 2013, he has worked as a senior clinical fellow in advanced heart failure at Harefield Hospital. Furthermore, for his academic and clinical work, Dr Karagiannis has been awarded a fellowship of the European Society of Cardiology and a fellowship of the European Heart Failure Association.




Diseases, Medical Tests and Treatments
Cardiac Rehabilitation
ECG monitor (24 hours)
Transoesophageal Echocardiography
Echocardiogram
Coronary angiography
Pacemaker Implantation
Heart failure
Preventive cardiology
Echocardiography
Acute cardiac care
Coronary Artery Disease
Heart Attack
High Blood Pressure
Chest Pain
Pulmonary Hypertension

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

— Dr Georgios Karagiannis

Education & training

  1. 2012–2018 MD · Medicine and Surgery
    Universidad Complutense de Madrid, Hemel Hempstead (GB)
  2. 2018–2022 Residency · Cardiology
    Universidad de Sevilla, Hemel Hempstead (GB)
  3. 2022–2023 Fellowship · Subspecialty training
    Royal Marsden London, UK

Career & appointments

  1. 2022-09–2023-08 Junior consultant
    Universidad Complutense de Madrid Teaching Hospital — Cardiology

Licenses & insurance

Medical licenses

GB — Organización Médica Colegial de España (OMC)
#GB-828640 active · expires 2028-12-31

Board certifications

European Board of Cardiology
#EB-451C2F1C · issued 2023 · renewal 2033
Malpractice insurance: HDI Global · 5,000,000 EUR coverage · No claims on file

Procedures performed

ProcedureCodeLifetime count
Cardiac consultation 99244 258
Echocardiogram 93306 1,389
Stress test 93015 891
Holter monitor 93225 846
Coronary angiography 93454 2,089
PCI / coronary stent 92928 1,999
Pacemaker implantation 33208 1,852

Services & pricing

ServiceDurationModalityPrice
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

Office, team & in practice

Georgios Karagiannis
HEADSHOT
Georgios Karagiannis in consultation
IN OFFICE
Georgios Karagiannis with the team
WITH TEAM
Georgios Karagiannis at a conference
CONFERENCE

Videos

introduction · 95s
Meet Georgios Karagiannis

Research & publications

h-index: 8 · i10: 4

  1. European registry analysis of Cardiology outcomes
    Georgios Karagiannis, et al. · JACC, 2025
    DOI: 10.2606/euroclin.2025.0 · PMID: 34338817 · cited by 72
  2. Outcomes of Cardiology in adults — a multi-centre cohort
    Georgios Karagiannis, et al. · European Heart Journal, 2024
    DOI: 10.5704/euroclin.2024.1 · PMID: 32723886 · cited by 34
  3. European registry analysis of Cardiology outcomes
    Georgios Karagiannis, et al. · JACC, 2023
    DOI: 10.5650/euroclin.2023.2 · PMID: 33205599 · cited by 4

Invited talks

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

Awards & memberships

Awards

  • 🏆 Top-rated Cardiology — Hemel Hempstead · EuroClinics Patient Choice · 2025 · regional
  • 🏆 Excellence in Patient Care · National Society · 2024 · national
  • 🏆 Young Investigator Award · European Society · 2023 · international

Society memberships

  • European Society of Cardiology (ESC) — Member · Since 2023
  • American Heart Association (AHA) — Member · Since 2023
  • EAPCI — Member · Since 2023
  • European Union of Medical Specialists (UEMS) — Member · Since 2023

Articles by this doctor

  • Patient education Patient guide to Cardiology 2026-03-10 · 5 min read
  • Awareness When should you see a cardiology? 2026-01-03 · 5 min read

For international patients

Coordinator
Patient liaison · dr.georgios.karagiannis@euroclinics.example
Accepted international insurance
Allianz Worldwide · AXA Global · BUPA Global · Cigna Global

Location

1 tag

Patient reviews

59 verified reviews
4.95
★★★★⯨
59 reviews
5★ 2
4★ 1
3★ 0
2★ 0
1★ 0
Bedside Manner
5.0
Knowledge
5.0
Wait Time
4.7
Staff Friendliness
5.0
Ease Of Appointment
4.9
Value For Money
4.9
Would Recommend Pct
98.0
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Recent reviews

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

SPECIALTIES & PROCEDURES

Dr Georgios Karagiannis's Areas of Specialty

Each specialty below reflects the conditions and procedures Dr Georgios Karagiannis treats, with the size of the national pool of United Kingdom doctors offering the same care.

Cardiology

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

Dr Georgios Karagiannis is one of 1,358 cardiology doctors indexed in United Kingdom. Browse cardiology doctors in United Kingdom →

LOCAL CARE CONTEXT

Why local healthcare in Hemel Hempstead matters

Medical practice in United Kingdom is governed by country-specific licensing, professional standards, and patient-safety regulations. Practitioners listed here are registered with the relevant United Kingdom medical authority and operate within national rules on scope of practice, prescribing rights, and continuing professional development. Care delivered in Hemel Hempstead carries the additional benefits of local language support, in-person follow-up, and direct coordination with regional hospitals and labs. 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 Hemel Hempstead or all doctors in United Kingdom.

Frequently asked questions

Quick answers to the questions patients ask most. The same answers are surfaced to AI assistants via structured data.

  • What does Georgios Karagiannis specialise in?

    Georgios Karagiannis specialises in Cardiology in Hemel Hempstead, GB. 24 years of clinical experience.

  • What conditions does Georgios Karagiannis treat?

    Georgios Karagiannis treats conditions within Cardiology. View the full conditions-treated list on the profile.

  • Where does Georgios Karagiannis practise?

    Georgios Karagiannis practises in Hemel Hempstead, GB. The profile page lists all practice addresses, phone numbers, and clinic affiliations.

  • What languages does Georgios Karagiannis speak?

    Georgios Karagiannis speaks English, French, German, Greek.

  • How do I book an appointment with Georgios Karagiannis?

    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.

  • What do patients say about Georgios Karagiannis?

    Georgios Karagiannis has a verified rating of 4.95/5 from 59 patient reviews. Read the most recent reviews on the profile page.

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