Hea failure cells are seen in

Ref Robbins 8/e p535, 7/e p122,9/e p116 Cut surfaces of hyperemic or congested tissues feel wet and typically ooze blood. On microscopic examination, acute pulmonary congestion is marked by blood-engorged alveolar capillaries and variable degrees of alveolar septal edema and intra-alveolar hemorrhage. In chronic pulmo- nary congestion, the septa become thickened and fibrotic, and the alveolar spaces contain numerous macrophages laden with hemosiderin ("hea failure cells") derived from phagocytosed red cells