František Mlejnský is a perfusionist at the 2nd Department of Surgery - Department of Cardiovascular Surgery, First Faculty of Medicine, Charles University and General University Hospital in Prague. Since 2004 he has been involved in the surgical treatment of thromboembolic pulmonary hypertension. He is member of ECMO team of General University Hospital. In 2016, he received his Ph.D. in the field of Experimental Surgery. He is member of Czech Society of Extracorporeal Circulation and Supporting Circulatory Systems.