Tricuspid valve malformation

Tricuspid valve malformation is a rare congenital heart malformation. One case was first reported by Ebstein in 1866, so it is also called Ebstein deformity. The incidence of congenital heart disease accounts for 0.5 to 1%. Tricuspid valve malformation refers to the tricuspid valve malformation. Its posterior and septal valve positions are lower than normal. It is not at the level of the atrioventricular annulus and moves down to the right ventricle wall near the apex. The anterior valve position is normal. Normally large, while the right ventricle is smaller than normal, with tricuspid regurgitation. Such malformations are often associated with open oval foramen or atrial septal defect and pulmonary artery stenosis. Due to the large amount of blood in the right atrium and increased pressure, part of the blood contained in the right atrium flows into the left atrium through atrial septal defect or oval foramen, and some still enters the right ventricle through the tricuspid valve. Due to pulmonary artery stenosis, the blood volume entering the pulmonary circulation is reduced. Therefore, the amount of arterial blood returned to the left atrium is also small. At this time, it is mixed with the venous blood shunted from the right atrium and enters the left ventricle and systemic circulation through the mitral valve.