title: Heparin-induced thrombocytopenia.
abstract: Heparin-induced thrombocytopenia is the most frequent and the most important idiosyncratic haematological drug reaction. It is important for several reasons: first, because heparin is used so often, and the frequency of heparin-induced thrombocytopenia is high, the risk of a hospitalized patient developing heparin-induced thrombocytopenia is high. Second, heparin-induced thrombocytopenia poses a major therapeutic dilemma for the clinician - continue the heparin and risk a worsening of the thrombocytopenia, or stop the heparin and risk extension or embolism of the thrombus. Finally, a small subset of patients with heparin-induced thrombocytopenia develop the disastrous complication of heparin-induced thrombocytopenia plus arterial thrombosis. Some of these patients die. In this review, we will summarize some of the issues concerning heparin-induced thrombocytopenia, including its frequency, the various techniques used to diagnose the condition, its pathophysiology and approaches that can be used to manage patients with heparin-induced thrombocytopenia.
mesh_terms: D001777:Blood Coagulation / Q000187:drug effects; D001792:Blood Platelets / Q000187:drug effects; D006493:Heparin / Q000009:adverse effects / Q000145:classification; D006801:Humans; D010976:Platelet Count / Q000187:drug effects; D012701:Serotonin / Q000378:metabolism; D013921:Thrombocytopenia / Q000139:chemically induced* / Q000175:diagnosis / Q000503:physiopathology; D013927:Thrombosis / Q000150:complications; D013997:Time Factors
chemical_list: D012701:Serotonin; D006493:Heparin