FIELD: medicine.SUBSTANCE: invention refers to medicine, particularly to pathoanatomical anatomy. Posterior and anterior walls of the right and left ventricles of the heart are incised from the atrium in the cavity of the right and left surfaces of the interventricular septum. Tripod for intravenous transfusions is preliminary installed； at that, 500 ml bottle is filled with water with an eosin solution at ratio of 1:1, the system for intravenous transfusions is connected to a flask filled with a contrast solution and fixed with a clamp. That is followed by exposing a pericardial sac, determining the amount and condition of the liquid in the pericardial cavity, evaluating a condition of the coronary arteries: a left coronary artery (LCA) and its branches - a circumflex artery (CA) and an anterior interventricular branch (AIB)； right coronary artery (RCA), presence of rupture and haemorrhages, density, tortuosity, submergence in the underlying organ tissues. Aortic arch is incised 2–3 cm long along the vessel. Coronary artery mouths are identified. Then catheters are alternated to them. Thereafter, the catheter is connected to a system for intravenous injections, to judge the patency of the coronary arteries, a contrasting examination of the LCA and the RCA is performed. Clamp is loosened in the system and the time of beginning of the eosin solution delivery into the cardiac vessels is recorded. For 50–60 seconds, this solution fills the coronary artery with painting of the main part of the vessel and its collaterals. Further, coronary vessels are dissected along the blood flow taking into account data of their contrast examination, precise location of stable and unstable fibrous plaques, thrombotic masses and other pathological changes. That is followed by sampling fragments of anterior interventricular artery, envelope artery, right coronary artery, both unchanged and atherosclerotic affected areas. Thereafter, the posterior and anterior walls of the right and left
