to evaluate the detectability of cardiac septal defects by electrocardiographically synchronized ( ecg-gated ) magnetic resonance imaging ( mri ) , 48 subjects were imaged , including 18 normal and 30 abnormal subjects in whom 22 ventricular septal defects ( vsds ) and nine atrial septal defects ( asds ) had been diagnosed angiographically .
C0018816
cardiac septal defects
C0018818
ventricular septal defects