“…RV and coronary angiography are used to confirm the presence and extent of LV myocardial dependence on the coronary flow from the RV. 4,5,8,20,21 Noninvasive imaging, such as chest computed tomography (CT) may be an alternative to cardiac catheterization in diagnosing coronary artery abnormalities; however, cardiac catheterization remains the preferred diagnostic tool due to the ability to simultaneously preform therapeutic interventions. 3,8,22…”