Dr. Hristov graduated from the Higher Medical Institute in 1971 and immediately after that he started working at the Cardiology Department in MBAL Burgas. In 1973 he started working at the Military Medical Academy (VMA) in Sofia. He worked for 8 months in Alexandrovska Hospital in the hemodialysis center with the team of Prof. Puhlev and Dr. Kiryakov. He has been an assistant for 10 years with Prof. Kaponov and Prof. Dr. D. Nenov. He defended his dissertation in 1984.
From 1984 to 2012 he worked at the Hemodialysis Department of the University Hospital in Burgas.
From 1986 – 2020 he is lecturer in internal medicine at the Medical College Burgas.
He has participated in a number of scientific researches and conferences in the field of hemodialysis and has published 98 articles so far