Objective To explore the strategy and treatment of open hearty surgery for pregnant woman to improve the maternal and fetal outcomes. Methods The perioperative data of 7 pregnant women with heart diseases in our hospital from January 2016 to December 2018 were retrospectively analyzed

meanwhile all the mothers and newborns were followed routinely.Results Among 7 patients，there were 4 case of subacute bacterial endocarditis associated with rheumatic valve disease or congenital heart disease，1 case of rheumatic valve disease and 2 cases of acute Stanford type A aortic dissection.According to New York Heart Association (NYHA) functional class

2 were in Ⅲ and 5 were in Ⅳ.The gestational age of pateints received cardiac surgery ranged from 24 to 37 weeks(median 29 weeks)

3 patients had undergone caesarean section combined with cardiac surgery;3 patients had undergone cardiac surgery firstly，and then chose to continue pregnancy to full term

and then caesarean section was performed;1 patients with 24 weeks of gestational age had undergone cardiac surgery，the fetal was dead in the uterus preoperative and spontaneous abortion in 2 days postoperative

the mater was dead in 15 days postoperative.The remaining mothers and newborns were followed up for 1 to 23 months(median 9 months)，the quality of life of the mothers were improved and the cardiac function recovered to functional class Ⅰ

the newborns were alive.Conclusion Cardiac surgery during pregnancy is associated with acceptable maternal and fetal mortality.Timing of the surgery is very important for the outcome of fetal and maternal.