All drugs except flumamine patients used in preoperation and postoperation, during exreacorporeal circulation and anesthesia had not influence to HCY metabolism.

• (3)患者住院期间均为低盐低脂普食，术前、术后、麻醉和体外循环所用药物(二甲双肌除外)对HCY代谢无影响。