A<unk>  is a pattern of blood flow in the heart that deviates from the normal circuit of the circulatory system. It may be described as right-left, left-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 heart valve or both. The presence of a shunt may also affect left and/or right heart pressure either beneficially or detrimentally.
Cardiac shunt
Pulmonary shunt
Atriocaval shunt
Cerebral shunt
Sano shunt
Pulmonary-to-systemic shunt
Portacaval shunt
Atrial switch