Abstract: Objective To investigate the levels of CD62P expression on patients with acute thrombotic cerebral infarction （ATCI） or acute cardiogenic cerebral embolism (ACCE). Methods The levels of CD62P expression were detected with flow cytometry (FCM) in the blood of 35 patients with ATCI, 30 patients with ACCE, and 33 healthy controls. Results Comparing with the controls, the levels of CD62P expression on patients did not increase both in the ATCI group and the ACCE group. (F=1.12, F=1.59；P>0.05). Furthermore, there wasn't significant difference in the expressions of CD62P between the ATCI group and the ACCE group. Conclusion The expressions of CD62P do not increase on the patients with ATCI and ACCE, although it is one of the markers of platelets activation.

Key words: CD62P, acute thrombotic cerebral infarction, acute cardiogenic cerebral embolism, flow cytometry