Objective To investigate the application of fetal heart malformation examination by color Doppler echocardiography in diagnosis of fetal atrial septal aneurysm (ASA). Methods Five thousand three hundred and ten cases were screened from October 2007 to November 2011 in our hospital. The cut surfaces of four chamber of heart were observed carefully to screen the potential ASA. Results The acoustic image results of 30 cases of fetal ASA showed that the atrial septal became thinner and swollen from the RA side ...