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Background Right ventricular (RV) function is recognized as a prognostic factor in congenital heart disease (CHD). Accurate echocardiographic parameters to assess systolic function in systemic RV (sRV) lacking. We previously introduced a novel four-view approach with different RV walls visualized in their long axis from one apical view using 2D-multi-plane transthoracic echocardiographic (TTE) (iRotate). Aims To extensively evaluate RV systolic function using iRotate echocardiography in CHD patients with systemic RV compared with a whole spectrum of CHD patients with abnormally loaded subpulmonic RV. Methods and Results Thirty CHD patients with sRV and 112 age, gender and BSA matched patients with abnormally loaded subpulmonic RV were recruited from the outpatient clinic. All subjects underwent complete TTE with evaluation of TAPSE, TDI S’ and peak systolic global longitudinal RV strain (RV-GLS) from the RV walls using the four-view iRotate model. The feasibility of TAPSE and TDI S’ ranged between 94% and 100%. The feasibility of RV-GLS in CHD was 98%, 69%, 87% and 72% respectively in the lateral, anterior, inferior and inferior coronal view walls. All echocardiographic parameters were significantly lower in sRV compared to versus subpulmonic RV cohort (p &amp;lt; 0.001) (Table). Conclusion This study provides for the first time an extensive RV specific analysis of the systemic RV. The feasibility of all RV parameters in the four-view iRotate model is excellent in CHD and represents a reproducible, easily applicable and complete RV assessment in daily practice. Systolic function is significantly reduced in systemic RV compared to subpulmonic RV physiology. Abstract P990 Figure.

P990 Multi-plane echocardiographic analysis of right ventricular function in patients with systemic and subpulmonic physiology