Summary
In 382 patients, aged 21 to 76 years, including 39 healthy volunteers, a platelet
count by Olef’s method, an adhesive platelet count by Moolten-Vroman’s method, prothrombin
activity due to one-stage prothrombin time and calcium clotting time were measured.
In 39 cases of myocardial infarction and 40 cases of cerebral thrombosis, both in
acute stage, a marked decrease in the adhesive platelet count and adhesive index and
an increase of prothrombin activity were observed with statistical significance compared
to the healthy group (P < 0.01). In the recovery stage of myocardial infarction, cerebral
thrombosis and other diseases, except for malignant tumors, acute infectious diseases,
diabetes mellitus and blood or liver diseases, the above observations were absent
or reduced. In the case of thrombosis, a negative correlation was seen between the
adhesive platelet count and prothrombin activity (r — —0.238, P < 0.01). There is
no correlation between the changes in platelet adhesiveness or blood coagulability
and total cholesterol level in serum.