The associate professor Mariya Negreva works in the First Clinic of Cardiology in St. Marina Hospital, Varna and in the Medical University of Varna. She is interested in the field of arrithmias, especially atriall fibrilation - its triggering mechanisms,new options for tretament, as well as the early changes in hemostasis. She has interested in basic (experimental) as well as clinical cardiology - acute coronary syndrome and echocardiography.