| Namespace | MPheno.ontology | Obsolete | false |
| description | a right-to-left shunt allows the deoxygenated, systemic venous return to bypass the lungs and return directly to the systemic arterial circulation; the oxygen content of the systemic arterial blood falls in proportion to the volume of systemic venous blood mixing with the normal pulmonary venous return; with reduced oxygen content, even with normal cardiac output, tissue oxygen delivery falls and the work capacity of muscles is limited |
