Multimodality Imaging for Giant Left Circumflex Branch Aneurysm Rupturing Into the Superior Vena Cava‐Right Atrial Junction

Giant coronary artery aneurysms with fistulas are extremely rare and high-risk. This manuscript presents a rare case of a giant left circumflex (LCX) branch aneurysm rupturing into the superior vena cava-right atrial (SVC-RA) junction, accompanied by severe valvular regurgitation. Transesophageal echocardiography visualized the aneurysm and turbulent shunt flow, cardiac computed tomography angiography (CCTA) precisely delineated the anatomical details, and 3D CT reconstruction clarified spatial relationships. This multimodality imaging approach was pivotal in guiding successful single-stage surgical intervention. Trial Registration: This article is a case report and does not describe a clinical trial; therefore, trial registration was not required.