ОСОБЕННОСТИ СТРОЕНИЯ КАМЕР И КРОВЕНОСНОГО РУСЛА СЕРДЦА ПРИ СОЧЕТАНИИ ОТКРЫТОГО АТРИОВЕНТРИКУЛЯРНОГО КАНАЛА С ОБЩИМ АРТЕРИАЛЬНЫМ СТВОЛОМ

The authors described two prepared children’s hearts who died due to complicated congenital heart disease of the age of 9 month and 11 month and 24days. Atrioventricular canal defect was combined with truncus arteriosus. The methods of preparation and descriptive anatomy were used. In the first case the 9-months-old girl had the orifice of the common truncus above the left ventricular chamber. The outlet from the right ventricle was carried out through the defect of the interventricular septum. The pulmonary arteries departed from the posterior wall of the trunk at the junction of its arch into the thoracic aorta. The coronary sinus’s orifice was absent.In the second case the common truncus departed from the arterial right ventricle cone. It divided into the ascending part of the aorta and the pulmonary trunk at a distance of 10 mm, which branched out into the right and left pulmonary arteries. The outlet from the cavity of the left ventricle to the orifice of common truncus was carried out through the interventricular septum defect. The coronary sinus’s orifice was located in the left atrial chamber. The sinus of the pulmonary veins was separated from the cavity of the left atrium by a muscle plate. It bifurcated and approached to the posterior wall of the chamber forming the hole which communicated the cavity of the left atrium with the sinus of the pulmonary veins. There was an accessory vena cava superior, which entered the chamber at the base of the auricula sinistra.In the both cases, the secondary atrial septum was hanging over the canal, limiting the primary defect.In a 9-month-old child was the right dominant circulation. And in the 11-month-old child there was a codominant heart. In the both cases great cardiac vein and posterior vein of the left ventricle were prevailed drainage zones.