Dr. Gersak is a full Professor of Surgery, University of Ljubljana, Medical Faculty and Department of Cardiovascular Surgery at University Medical Center Ljubljana, Slovenia. He is active in the cardiovascular medicine for more than 35 years and published more than 500 peer reviewed papers and presentations on various topics in cardiac surgery. He organized and chaired many international surgical meetings around the world, including European Congress of Cardiovascular Surgery and World Congress of Cardiothoracic, Vascular and Endovascular Surgery. His main interest is minimally invasive cardiac surgery for mitral and aortic valve pathology, as well as atrial fibrillation. He was visiting professor in various institutions around the world, including Tel Aviv (Israel), Sao Paolo (Brazil), Ryhadh (Saudi Arabia), Kuala Lumpur (Malaysia), and served as proctor and master proctor for Edwards, Atricure and Sorin-Livanova. At the present moment he is very active in USA and Japan.