Anatomical Determinants of Rare Congenital Cardiac Disorders: A Narrative Review

Rare congenital cardiac disorders emerge from early developmental disturbances that reshape chamber geometry, alter arterial and venous alignment and modify valvular architecture, creating complex structural patterns with distinct physiological consequences. A central rationale for this narrative review is the need to unify scattered morphological insights to support a clearer interpretation of these uncommon conditions across varied clinical environments. This narrative review focuses on integrating the principal anatomical determinants that shape the presentation of rare congenital cardiac anomalies, linking developmental events with structural configurations that influence circulatory behavior, physiological adaptation and long-term functional stability. Literature published from 2015 to 2025 was examined through targeted searches across major scientific databases, selecting studies that offered detailed structural, embryological or imaging-based perspectives relevant to these disorders. The content integrates current understanding of looping deviations, conotruncal malformations, anomalous venous pathways, valvular morphogenesis defects, laterality disturbances, vascular rings and advanced imaging contributions, outlining how each category introduces distinctive shifts in hemodynamic patterns. This narrative review underscores the importance of precise morphological evaluation for early recognition, informed procedural planning, optimized intervention strategies, enhanced risk stratification and comprehensive longitudinal assessment. Consolidated anatomical insight strengthens diagnostic confidence and improves clinical decision-making for individuals presenting with rare congenital cardiac abnormalities. Such integrated knowledge ultimately supports the development of more refined and individualized management pathways.