The presence of a right-to-left heart shunt is not very positive.
A right-to-left cardiac shunt is a condition in which blood from the right atrium or right ventricle, through an abnormal channel, shunts directly into the left ventricle or left atrium or when the pulmonary artery passes through an abnormal channel (pulmonary stenosis) directly into the pulmonary vein or the aorta resulting in a direct flow of venous blood into the arterial blood into the body’s circulation.
Since venous blood contains less oxygen and nutrients, it has the potential to cause cyanosis and immunocompromise over time. Right-to-left shunt is usually caused by congenital heart disease such as tetralogy of Fallot, misalignment of the great arteries, tricuspid atresia, etc. It can lead to heart block, heart failure, arrhythmia, heart enlargement and other related symptoms.
Once the diagnosis of congenital heart disease is clear, it should be treated as early as possible. Depending on the situation, suitable surgical treatment should be chosen to avoid delaying the condition.