Statistical analysis
Median values with range were calculated for each patient variable with numerical data. Percentage of total patients was calculated for categorical characteristics. Welch’s t-test, unpaired t-test and chi-square was used for comparison of ASD and pulmonary hypertension hemodynamic measurements on echocardiogram and catheterization. Inter-observer variability and concordance of the EDSPA measurements were calculated using the sign of Pearson’s r and the Lin’s concordance. Receiver operating characteristic curves were utilized to display the predictive ability of EDSPA to discriminate select groups.