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Pulmonary Congestion

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  • Decreased outflow of venous blood
  • Most commonly caused by left-sided or bilateral cardiac failure
    • Stagnant blood in pulmonary vessels -> red blood cells move into alveoli and are phagocytosed -> haemosiderin in macrophages (heart failure cells)
  • One-sided in post-mortem hypostatic congestion
  • Acute pulmonary congestion is seen after barbiturate euthanasia
  • Leads to pulmonary oedema (below)
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