megakaryocyte-platelet regeneration time ( mprt ) was determined 6 to 12 months after myocardial infarction in 42 patients below the age of 45 years ( mean age +/- sd = 39.4 +/- 4.6 , range 23 to 44 ) and in 11 healthy control subjects by measurement of the reappearance rate of platelet cyclooxygenase activity after oral aspirin .
C0027051
myocardial infarction
C0004057
aspirin