title: INCREASED SENSITIVITY TO HEPARIN FOLLOWING ACUTE MYOCARDIAL INFARCTION.
abstract: In vivo increased sensitivity to heparin has been demonstrated in patients following an acute myocardial infarction. An intravenous injection of 10,000 units of heparin was given to each of 18 patients with recent myocardial infarction in order to compare them with 17 patients who were not suffering from any acute illness. The changes in whole blood clotting time, recalcified plasma clotting time and prothrombin time were greater and more prolonged in the patients with recent myocardial infarction. Of the three tests, the one-stage prothrombin time provided the simplest and the most precise measurement of heparin sensitivity. The reason for this was not clear: it is possible that it is related to shock and congestive heart failure which were complications of the clinical course following myocardial infarction.
mesh_terms: D056988:Anterior Wall Myocardial Infarction; D035843:Biomedical Research; D001777:Blood Coagulation; D001780:Blood Coagulation Tests; D006493:Heparin / Q000627:therapeutic use*; D006801:Humans; D007275:Injections, Intravenous; D009203:Myocardial Infarction; D011516:Prothrombin; D011517:Prothrombin Time; D014914:Whole Blood Coagulation Time
chemical_list: D011516:Prothrombin; D006493:Heparin
keywords: BLOOD COAGULATION TESTS; CLINICAL RESEARCH; HEPARIN, THERAPEUTIC; MYOCARDIAL INFARCT; PROTHROMBIN TIME