AbstractSince the advent of cardiovascular angiography only a few decades ago (1), a massive number of data related to the ventricular function have been accumulated. Specifically, left ventricular (LV) geometry, volumes, and patterns of contractility have been extensively investigated (2–7), especially in patients with coronary artery disease (8–11). In contrast, much less attention has been given to the characteristics of the right ventricle (RV). This has been due partially to the fact that the LV was always considered to be the more important chamber of the heart. The relative neglect of RV performance has been further compounded by difficulties in analyzing the geometry of the RV chamber: while the LV configuration approximately resembles an ellipsoid of revolution (and therefore lends itself to relatively simple mathematical analysis), the RV has always been considered a somewhat amorphous structure that does not yield to simple geometric manipulation.In this review, recent approaches to the angiographic measurements of RV volumes and ejection fraction are exami