<unk> s refer to the abnormal flow of blood or mixing of blood between anatomic structures that are ordinarily separated. An example would be mixing of blood between the right atrium and the left atrium in a patient with an atrial septal defect.  The direction of flow of the blood may be described as right-to-left, left-to-right or bidirectional, or as systemic-to-pulmonary or pulmonary-to-systemic. The direction may be controlled by left and/or right heart pressure, a biological or artificial valve, or both.
Cardiac shunt
Cerebral shunt
Ventricular reduction
Left-to-right shunt
Pulmonary atresia surgery
Blalock-Taussig shunt
Right-to-left shunt
Aortopulmonary window