Final answer:
Atrioventricular discordance and ventriculoarterial discordance are congenital heart defects in L type transposition, where the atrioventricular valves and the great arteries are switched. In atrioventricular discordance, the mitral valve is located on the right side and the tricuspid valve is located on the left side. In ventriculoarterial discordance, the left ventricle is connected to the aorta and the right ventricle is connected to the pulmonary artery.
Step-by-step explanation:
Atrioventricular discordance and ventriculoarterial discordance are specific types of congenital heart defects known as transposition abnormalities. In L type transposition, also known as congenitally corrected transposition of the great arteries, the atria and ventricles are correctly positioned, but the great arteries are switched. This means that the left ventricle pumps blood to the pulmonary artery instead of the aorta, while the right ventricle pumps blood to the aorta instead of the pulmonary artery.
For example, in atrioventricular discordance with L type transposition, it means that the atrioventricular valves are switched. The mitral valve, which is normally on the left side, is located on the right side and the tricuspid valve, which is normally on the right side, is located on the left side.
Ventriculoarterial discordance refers to the abnormal relationship between the ventricles and the great arteries. In L type transposition, the left ventricle is connected to the aorta and the right ventricle is connected to the pulmonary artery, which is the opposite of the normal arrangement. This leads to a complete inversion of the normal circulation of oxygenated and deoxygenated blood.