Nikolaos Lionakis is a Specialist Cardiologist with a subspecialty in Interventional Cardiology and maintains a private practice in the center of Athens (13 Papadiamantopoulou Street, Megaron Mousikis area). He is a graduate of the Medical School of the National and Kapodistrian University of Athens. After his specialization in Cardiology, he received further training in Interventional Cardiology, specifically in the interventional treatment of Coronary Artery Disease, obtaining the official subspecialty certification from the Ministry of Health. For the past 15 years, he has continuously worked as a Registrar in the National Health System, and since 2021, he has served as a Senior Registrar at the Cardiology Clinic and the Hemodynamic Laboratory of the Army Fund Hospital (N.I.M.T.S.). In his private practice, he manages cases covering the entire spectrum of cardiology aimed at the prevention, diagnosis, and treatment of cardiovascular diseases.