Navigation of the Clinical Implications, Interventional Challenges, and Complexities of the Circumflex Coronary Artery: A Comprehensive Review

The circumflex (Cx) coronary artery is more vulnerable to injury than other coronary arteries during procedures such as radiofrequency ablation, left atrial appendage closure, mitral valve repair, and coronary sinus-based mitral valve intervention. Furthermore, a lower success rate was also observed in the Cx artery during chronic occlusion recanalization. Additionally, injury to the great cardiac vein during Cx artery interventions can occur due to the highly variable and often unpredictable relationship between the great cardiac vein and the Cx artery, which occurs in approximately 30% of cases. Imaging information on the Cx artery and the associated relationship with surrounding cardiac structures is crucial for understanding spatial orientation. This knowledge aids preventive measures, accurate prediction, prompt recognition, and understanding of injury mechanisms, thereby facilitating appropriate therapeutic interventions. We present a comprehensive literature review of the clinical implications, complexities, and challenges associated with the Cx artery, which could help in management strategies and improve outcomes.