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Background Altered hemodynamics in total cavopulmonary connection (TCPC), a palliation of single ventricle defects, results in long-term complications, such as decreased exercise capacity, arrhythmia, and ventricular failure [1]. Non-invasive hemodynamic evaluation of TCPC has been an important clinical challenge. Several studies have tried to understand and predict specific flow features using a combination of patient-specific MRI data and computational tools to develop more realistic numerical and physical models. Most numerical studies have based their analyses of TCPC efficiency on energy loss calculations, but assumptions such as rigid walls and idealized flow conditions might affect accuracy hindering clinical applicability [2]. The purpose of this study was to calculate kinetic energy (KE) from in vivo 4D Flow MRI velocity measurements, in the TCPC and single ventricle for assessing efficiency of the system.

Kinetic energy efficiency of single ventricle and TCPC using 4D flow MRI