Right Atrial Pressure (RAP) represents a fundamental hemodynamic parameter in the evaluation of cardiac pathologies. However, the gold standard for assessing this parameter remains an invasive measurement. The invasiveness of such techniques limits their routine use, highlighting the need for reliable non-invasive alternatives. The diameter and Caval Index (CI) of the inferior vena cava (IVC), derived from ultrasound imaging, allow an indirect estimation of RAP through semi-quantitative criteria defined by current international guidelines, which classify RAP into three levels (low, intermediate, and high). While these recommendations offer a practical and straightforward approach, their application is often limited by suboptimal precision and reproducibility.