The maximam platelet aggregation rates by four different agonists(Adenosine diphosphate,Epinephrine,Collagen,Arachidonic acid)increased significantly in control group dogs.

• 长期心房快速起搏使对照组犬二磷酸腺苷、肾上腺素、胶原和花生四烯酸诱导的血小板最大聚集率较起搏前明显增加,缬沙坦能够部分抑制起搏引起的血小板激活。