hydropericardium

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(medicine) Accumulation of serous fluid in the pericardial sac.

The noninflammatory accumulation of watery fluid in the pericardial cavity.

An excess of transudate in the pericardial cavity. The cardiac shadow is enlarged and distorted on radiography; its size encroaches on the area over which lung sounds can normally be heard.

• h. syndrome — sudden death in chickens with hydropericardium and acute hepatocytic necrosis; caused by group I avian adenovirus, possibly in association with chicken anemia virus infection. Called also hydropericardium-hepatitis syndrome, inclusion body hepatitis-hydropericardium syndrome, Angara disease.