Patient's question:
Six months pregnant, major anomaly scan, persistent left superior vena cava in the fetus, left superior vena cava into the coronary sinus. What does this mean? Is it serious?Doctor's answer:
Persistent left superior vena cava, also known as bilateral superior vena cava malformation, is formed by the failure of the left anterior cardinal vein and the left Cuiver duct to close during fetal development, and it usually drains into the coronary sinus. This condition is often associated with other congenital cardiovascular malformations, but the isolated form does not cause significant pathological or physiological changes, nor does it present with obvious symptoms or signs. It requires no treatment and is considered a normal variant. It is likely to pose no hindrance. Your situation requires a fetal echocardiogram to rule out heart malformations. Once excluded, there is no need to worry!