To study the mechanism of the dysfunction of platelet after coronary artery stent implantation (CASI),we observed the change of the product of nitric oxide (NO),activity of NO synthase (NOS) and L-Arginine transport before and after CASI.

• 通过观察冠心病人PTCA支架植入术后血小板一氧化氮（NO）生成、NO合酶（NOS）活性和L-精氨酸（L－Arg）转运的变化，探讨PTCA支架术后血小板功能受损的机制。