Right-to-left shunt

Right-to-left shunt is a cardiac shunt which allows, under certain conditions, blood to flow from the right heart to the left heart directly. This can occur at the atrial, ventricular, or arterial level. Right-to-left shunting is a form of congenital heart defect, and can lead to cyanosis, a condition characterized by a bluish color of the skin and mucous membranes.

Causes

Right-to-left shunts can be caused by several conditions, including Tetralogy of Fallot, Eisenmenger's syndrome, and transposition of the great arteries. These conditions can cause a reversal of the normal blood flow, leading to a right-to-left shunt.

Symptoms

The symptoms of right-to-left shunt can vary depending on the severity of the condition. Common symptoms include cyanosis, shortness of breath, and fatigue. In severe cases, right-to-left shunt can lead to heart failure.

Diagnosis

Diagnosis of right-to-left shunt typically involves a combination of physical examination, medical history, and imaging tests. These may include echocardiography, cardiac catheterization, and magnetic resonance imaging (MRI).

Treatment

Treatment for right-to-left shunt depends on the underlying cause and the severity of the condition. Treatment options may include medication, surgery, or catheter procedures.

See also

• Left-to-right shunt
• Heart defect
• Cyanosis