title: [Effect of heparin on platelet aggregation in vitro].
abstract: Heparin added to citrated platelet rich plasma influences shape change and aggregation of platelets in different ways. In the presence of heparin neither ADP nor collagen induces shape change, while shape change after thrombin or arachidonic acid remains unaltered. Heparin potentiates the first aggregation step induced by ADP and epinephrine but inhibits aggregation induced by thrombin and ristocetin. The second phase of aggregation and the release reaction are not directly influenced by heparin no matter which aggregation agent is used.
mesh_terms: D000244:Adenosine Diphosphate / Q000494:pharmacology; D016718:Arachidonic Acid; D001095:Arachidonic Acids / Q000494:pharmacology; D001792:Blood Platelets / Q000187:drug effects; D003094:Collagen / Q000494:pharmacology; D004837:Epinephrine / Q000494:pharmacology; D006493:Heparin / Q000494:pharmacology*; D006801:Humans; D007213:Indomethacin / Q000494:pharmacology; D010974:Platelet Aggregation / Q000187:drug effects*; D012310:Ristocetin / Q000494:pharmacology; D013917:Thrombin / Q000494:pharmacology
chemical_list: D001095:Arachidonic Acids; D012310:Ristocetin; D016718:Arachidonic Acid; D000244:Adenosine Diphosphate; D006493:Heparin; D003094:Collagen; D013917:Thrombin; D007213:Indomethacin; D004837:Epinephrine
vernacular_title: Der Einfluss von Heparin auf die Plättchenaggregation in vitro.