Passive congestion consists in an increased
quantity of blood present in a territory due to difficulties in venous
blood flow. It may be generalized or localized, acute or chronic. The
liver, like the lung, is one of the first organs to suffer from generalized
congestion. Major causes of passive hepatic congestion include global
or right cardiac failure. The microscopic appearance of a liver with passive
congestion depends on the severity of the condition and on its evolution.
In the initial stages, illustrated by the image, only blood accumulation
in the centrilobular vein and sinusoids can be seen (H&E, 100x).
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Peleteiro. M Pinho & JS Orvalho
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