We read with interest the article by Zheng et al. who evaluated the influence of cardiac phase selection on coronary geometry and Coronary Computed Tomography Angiography based computational fluid dynamics (CFD) outputs in normal and anomalous anatomies.1 Their findings highlight substantial phase-dependent variability in luminal area, wall shear stress derived metrics, and CT-FFR, underscoring an important but often overlooked source of analytic heterogeneity. While the study contributes valuab…