Blood samples for measurement of plasma TXB2 and 6-keto-PGF1a. by RIA were simultaneously taken from A0 and CS in all cases.

• 对所有受试对象，同时采集升主动脉根部（AO）及CS血进行血浆TXB2及6－酮－PGF1a的测定（放射免疫分析法）。