Figure 1

Three methods were used to define the severity of RV malformation listed as severity index-area (A), total left/right- volume index (B) and total left/right -area index (C),severity index-area is the ratio of area of right atrium and atrialized RV to area of functional RV and left heart ,total left/right-volume index is the ratio of volume of total left heart to volume of right heart. Total left/right-area index is the ratio of area of total left heart to area of right heart. And the three method were measured on the 4 chamber at the end-diastole phase.