[Review: heparin. 2. Effect on thrombocytes, vascular walls and fibrinolysis].

In a brief survey the impact on thrombocyte functions and thrombocyte values caused by heparin and its fractions is reported, with the acute and immuno-allergic form of heparin-induced thrombopenia being widely dealt with. Furthermore, the relationship between heparin and vessel wall, particularly then its endothelial layer, is discussed and finally, its impact on the mechanisms of fibrinolysis is reported.