Statistical Methods
Statistical analyses of data were performed using MS Excel (Microsoft, Redmond, Washington), XLSTAT (Addinsoft, New York, New York) and the statistical software package R. Data was checked for normal distribution by visual assessment of histograms, Q-Q plots and additionally Shapiro-Wilk-test. Normally distributed data is presented as mean ± standard deviation, not normally distributed data as median with interquartile range (IQR). Percentiles were estimated using the functionquantile of the statistical software package R with standard settings. Associations between 3D-RV FWS and patient outcomes was evaluated by linear (for continuous outcomes) or logistic (for binary outcomes) regression analysis. We adjusted for age and sex.