To investigate the antithrombotic function of traditional medicine salvia and aspirin in the myocardial infarction rats.

The myocardial infarction animal model was established by ligating left anterior descending coronary artery. The rats were randomly divided into the model group, the aspirin group, the salvia miltiorrhiza group, and the combination therapy group, with 8 rats in each group. The salvia miltiorrhiza group was injected with Danshen freeze-dried powder 17 mg/kg via tail vein injection, aspirin group was given aspirin 10 mg/kg, the combination group was given aspirin 10 mg/kg with the tail vein injected with Danshen freeze-dried powder 17 mg/kg, and the model group was given an equal volume of normal saline with an equal volume of saline injected into the tail vein. Continuous administration last 10 days, once daily. The blood coagulation, platelet aggregation, thromboxane B2, 6-Keto-F_1α and von Willebrand factor were detected and compared.

Compared with the model group, the maximum platelet aggregation rate(32.55% ± 9.57 %, 32.16% ± 10.76%, 19.74% ± 6.70% vs. 58.75% ± 4.81%) in the rats of the aspirin group, the salvia group and the combined treatment group significantly decreased, and the contents of TXB2 (70.58 ± 9.31 ng/ml, 73.10 ± 11.33 ng/ml, 49.25 ± 5.33 ng/ml vs. 107.86 ± 17.45 ng/ml) decreased (P<0.01). The maximum platelet aggregation rate and contents of TXB2 in the combination group were lower than those in the aspirin group and the salvia group (P<0.01). Compared with the model group, the 6-Keto-PGF_1α content (67.64 ± 7.12 ng/ml, 81.72 ± 10.72 ng/ml vs. 57.80 ± 11.19 ng/ml) of the aspirin group and the combined treatment groupwas increased (P<0.05), prothrombin time (13.11 ± 0.67 s, 15.85 ± 0.25 s vs. 10.77 ± 0.46 s) prolonged (P<0.05), vWF (51.31 ± 4.12 ng/ml, 47.72 ± 10.32 ng/ml vs. 128.81 ± 11.14 ng/ml) decreased (P<0.05). The contents of 6-Keto-PGF_1α of the combined treatment group was increased compared with aspirin group and salvia group (P<0.05), prothrombin time decreased than aspirin group (P<0.05) and Salvia group and vWF decreased than Salvia group (P<0.05).

The salvia miltiorrhiza and aspirin combination therapy has synergistic effect on anti-platelet aggregation and anticoagulant effect. The salvia miltiorrhiza and aspirin combination therapy showed small bleeding risk.

Myocardial infarction; Salvia miltiorrhiza; Aspirin; Drug therapy, combination; Rats