0041 - 79 938 95 71      info@venartis.org      drragg


European Venous Forum 2024

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24th EVF Annual Meeting 27-29 June 2024 Athens, Greece


UIP World Congress of Phlebology 2023

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Miami Beach (USA), 17-21 September, 2023

1st Price AVLS Best in Show for Poster Presentations "Venous insufficiency in Children and Adolescents: Proof of Progression Progression over 4 years“


65. Jahrestagung der deutschen Gesellschaft für Phlebologie


Duisburg (Germany), 6 - 9 September, 2023

Meet Dr Ragg and his team!

Phlebologische Prävention - von der Idee zur Methode

Sitzung der AG Prävention | Vorsitz: J. C. Ragg, Berlin 

Tätigkeitsbericht der AG Prävention, Venartis Forschungspreis: J. C. Ragg, Berlin 
Neue Studiendaten über Frühstadien der venösen Insuffizienz:  N.N. 
Optimierte Therapie der saphenofemoralen Crosse:  T. Belyavskaya, Berlin 
Ultraschallschnellkurs: Individuelle Ursachen der venösen  Insuffizienz:  S. Kreis, Zürich (CH) 
KI-gestützte Studie: Progressionsmuster der venösen Insuffizienz:  J. C. Ragg, Berlin 
Für die Praxis: Richtige und falsche Ratschläge für Venenpatienten:  O. R. Despa, Berlin


23. Annual Meeting of the European Venous Forum


 Berlin, Germany, June 22-24, 2023

2 ePosters: "Prevention In Phlebology -- From PREVENT-2 To German Work Group Recommendations“, "Artificial Intelligence In The Research Of Vein Valve Lesions"
Meet Dr Ragg and his team in Berlin!


23. Annual Scientific Meeting of the Australasian College of Phlebology (ACP)


Adelaide, Australia, May 6-9, 2023

4 Lectures "Venous insufficiency in children and adolescents: Progression over 4-6 years“, "Eccentric venous ectasias of the intra- and epifascial system: A primary correlate of insufficiency", "Intraindividual comparison of 1470 nm and 1940 nm endovenous laser systems and Biomatrix sclerosing foam“, "Hyaluronan gels in the treatment of valve lesions, vein dilatations and insufficiencies"


American Venous Forum 2023


San Antonio, Texas, February 22-25, 2023

Meet Dr. Ragg!

Presentation "Venous Insufficiency in Children and Adolescents: Progression Over 4 Years“ | February 23, 2023


The Berlin Workshop of Future Phlebology 2022

Berlin Workshop 2022

Berlin November 5 and 6, 2022

more information >>



22. Unionstagung der Schweizerischen Gesellschaften für Gefässkrankheiten


Zurich (Switzerland)

2. - 4. November 2022

Meet Dr Ragg and his team!

Flash Talks | 3 November 2022



64. Jahrestagung der deutschen Gesellschaft für Phlebologie

2022 Phlebologie-Kongress Hannover mit Dr. Ragg

Hannover (Germany), 28 September - 1 October, 2022

Meet Dr Ragg and his team!

29 September

Lecture | Kompression postinterventionell

1 October

Lecture | Neue Studiendaten über Frühstadien der venösen Insuffizienz  

Lecture | Kompressionsstrümpfen und Pharmazeutika in der Prävention

Lecture | Haben chirurgische und endovenöse Modalitäten einen präventiven Wert?

Lecture | Aktuelle Empfehlungen zur Etablierung präventiver Konzepte

Lecture | Prävention in der Phleobologie – Utopie und Realität



UIP World Congress of Phlebology 2022

2022 Phlebologie-Kongress Istanbul mit Dr. Ragg

Istanbul, 12-16 September, 2022


Lecture and Poster | Prevention in Phlebology – Late Results of PREVENT12



62. Jahrestagung der deutschen Gesellschaft für Phlebologie

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Leipzig (Germany), 2-5 September, 2020

Dr Ragg belongs to the congress advisory board.

Meet Dr Ragg!

3 September

COVID-19 in der Phlebologie | chairman and speaker
Lecture | Falldiskussion: Femoropopliteale Venenthrombose bei einer Patientin mit Covid-19-Infektion und vorbekanntem Venenstatus
4 September
Kompressionstherapie | speaker
Lecture | Optionen der internen Kompression mit perivenösen Fillern
Prävention in der Phlebologie | chairman and speaker | Formelle Gründung der AG Prävention
Lecture |  Prävention in der Phlebologie – Einführung
Lecture | Neuheiten in der Prävention der intra- und epifaszialen Insuffizienz
Complications of CVD | moderator and speaker
Lecture | Learning on the example of the waterfall – the importance of hemodynamic pressure for the progression of the CVD
5 September
Innovations in Phlebology and Lymphology | speaker and panel
Lecture | Scleroglue UV plus – ultraviolet light activated vein gluing
Specials in Phlebology | speaker
Lecture |  Erste Versuche mit einem modularen Laser-, Schaum- und Klebesystem (ScleroGlue® plus)



MEDICA 2019 | World Forum for Medicine

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Düsseldorf (Germany), 18-21 November, 2019


33rd AVLS (ACP) Annual Congress 2019

Phoenix, 7-10 November, 2019


The Berlin Workshop of Future Phlebology 2019

Berlin, November 2-3, 2019


10th EVF HOW 2019

Riga,17-19 October, 2019


Another Phlebology | 3rd International Workshop

Budapest, October 4-5, 2019


61st Annual Meeting of the German Society of Phlebology (DGP)

Münster, September 25-27, 2019


International Union of Phlebology Chapter Meeting

Krakow, August 25-27, 2019


Japanese Society of Phlebology – American Vein & Lymphatic Society (former ACP) / v-WIN joint session

Nagoya, July 4, 2019


20th Meeting of the European Venous Forum (EVF)

Zurich, June 27-29, 2019


20th Annual Scientific Meeting of the Australasian College of Phlebology

Cairns, May 5-7, 2019

Speaker: Dr Johann Christof Ragg Phlebologist, Germany

Dr Johann Christof Ragg is a vein specialist from Berlin, Germany. He was born in 1957 in Bad Wildungen in Hesse. He studied physics with a focus on laser physics, then medicine. In 2000 he founded his practice focusing on venous and arterial complications, and 2003 founded Angioclinic® in Berlin.For many years, Dr. Ragg has conducted research in the field of vascular medicine and holds many patents. He has published multiple articles on the use of hyaluronan in venous procedures and on film compression bandages. He has won multiple awards for research presentations from the American College of Phlebology, European Venous Forum, American Venous Forum, the German Society of Phlebology and the International Union of Phlebology. (see page 8 of Conference Handbook, PDF)


 vWINter days meeting 2019

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Meet Dr. Ragg at the vWINter days meeting
Dr. Ragg: "It´s the most international, most innovative and
therefore most important phlebology meeting in 2019“

Cortina d´Ampezzo (Italy), January 23 - 25, 2019


Dr. Ragg vWIN 2019   Dr. Ragg vWIN 2019

vWINterdays meeting 2019 | Experts discussing on stage: Mark Whiteley (UK), Chris Ragg, Ravul Jindal (India) and Lowell Kabnick (USA)


vWINterdays meeting 2019 | At the Venartis booth: Margaryta Zagdorodnyuk, Chris Ragg and Birgit Marquardt with Sergio Gianesini, host of the vWINterdays meeting

11. Saint Petersburg Venous Forum (SPVF)

St. Petersburg 2018

St. Petersburg, November 29 – December 1, 2018


The Berlin Workshop of Future Phlebology 2018

The Berlin Workshop of Future Phlebology 2018

Berlin, October 6-7, 2018


60th Annual Meeting of the German Society of Phlebology


Bielefeld, September 26-29, 2018


19th Meeting of the European Venous Forum (EVF)

Athen 2018

Athens, June 28-30, 2018


38th Annual Meeting for Japanese Society of Phlebology

Japan 2018

Yokosuka, June 14-15, 2018


18th International Congress on Phlebology and Lymphology

Argentinien 2018

Buenos Aires, June 6-8, 2018


COP International Veins Meeting 2018

Dr. Ragg London 2018 International Veins Meeting

London, March 14-16, 2018


IMAP São Paulo

São Paulo, March 2-4, 2018



American Venous Forum

American Venous Forum | 2018 Tucson, AZ

Tucson, AZ, February 20-23, 2018



World Congress of Phlebology

Melbourne, February 4-8, 2018



Master Course in Phlebology

Riga, November 24-25, 2017



ACP Annual Congress

 Austin, Texas, November 2-5, 2017



18. Unionstagung der Schweizerischen Gesellschaften für Gefässkrankheiten

Montreux, November 1-3, 2017



59. Jahrestagung der Deutschen Gesellschaft für Phlebologie

Stuttgart, September 20-23, 2017



Albarella Island, Venice, Italy, September 6-9, 2017

See some photos from recent Workshops

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About us

I have been working on innovations in venous medicine now for 17 years, together with my teams in Berlin, Munich and Zurich and a growing number of international friends.

My personal bio includes physics, interventional radiology, angiology, phlebology and meanwhile 27 years of clinical experience in interdisciplinary vascular medicine

Award Sponsors

All prizes are offered by the VENARTIS work group, from the private pocket of cooperating physicians.

The committee selecting the innovation award winner includes members of vWIN foundation and VENARTIS work group.


Work Group Dr. Ragg

c/o Swiss-VX Venentherapie
und Forschung GmbH
Chaltenbodenstrasse 16
CH - 8834 Schindellegi (SZ)
0041 - 79 938 95 71