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The Human Phenotype Ontology (HPO) is downloaded weekly from The file downloaded is considered the "last stable build" available for the ontology. For more about the HPO, view their website at

Term:Pulmonary blood flow redistribution
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Accession:HP:0033674 term browser browse the term
Definition:Pulmonary blood flow redistribution refers to any departure from the normal distribution of blood flow in the lungs that is caused by an increase in pulmonary vascular resistance elsewhere in the pulmonary vascular bed. Pulmonary blood flow redistribution is indicated by a decrease in the size and/or number of visible pulmonary vessels in one or more lung regions, with a corresponding increase in number and/or size of pulmonary vessels in other parts of the lung.
Comment:Upper lobe blood diversion in patients with mitral valve disease is the archetypal example of redistribution. See Figure 59 of Hansell DM, et al., Fleischner Society: glossary of terms for thoracic imaging. Radiology. 2008;246:697-722.

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  Human phenotype 0
    Phenotypic abnormality 0
      Abnormality of the respiratory system 0
        Abnormal respiratory system morphology 0
          Abnormal pulmonary thoracic imaging finding 0
            Pulmonary blood flow redistribution 0
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