in comparison with 44 healthy volunteers , the results have provided striking confirmation of 'hyperactive ' platelets in the early phase of myocardial infarction expressed by the shorter bleeding time , increasing plasmatic beta-thromboglobulin , increased platelet factor 4 release and shorter heparin thrombin clotting time , and by the increased platelet sensitivity to threshold concentrations of adenosine diphosphate and collagen .
C0027051
myocardial infarction
C0019134
heparin