George Ntaios serves as Professor of Internal Medicine at the Aristotle University of Thessaloniki and performs full clinical duties at the 1st PropaedeuticDepartment of Internal Medicine at the University General Hospital of Thessaloniki “AHEPA” in Greece. 

After obtaining his Master and PhD degrees at the Aristotles University of Thessaloniki, he was stroke-trained during a stroke fellowship at the CHUV in Lausanne and during the European Master in Stroke Medicine in Danube University in Austria.

He serves as the President of the Hellenic Stroke Organization since 2021, after a six-year term as its Secretary General. He was the leading Editor of the Stroke Textbook of the Hellenic Stroke Organization.

He served as the Treasurer of the Stroke Council of the European Society of Cardiology between 2022-2024. He served on the Executive Committee of the Board of Directors of the European Stroke Organization (2017-2020), and as the Chair of the Guidelines Committee of the European Stroke Organization (2014-2018).

He co-authored several Guideline documents and statements published by various scientific bodies like the European Society of Cardiology Council on Stroke, the European Heart Rhythm Association, the American College of Chest Physicians, the European Stroke Organization, the Hellenic Stroke Organization, the Hellenic Society of Cardiology, and the Hellenic Atherosclerosis Society. 

His main research interest focuses on ischemic stroke etiology, prevention and prognosis. He has published more than 330 articles in a broad range of journals including the New England Journal of Medicine, European Heart Journal, Circulation, Journal of Am