CTICasesRuptured Right Coronary Artery Aneurysm
Imaging findings
Contrast-enhanced CT reveals a large, high-attenuation hemopericardium measuring 50 to 60 Hounsfield units, causing severe compression of the right ventricle consistent with cardiac tamponade. A crummy but diagnostic outside-hospital CT suggests a large, spherical aneurysm arising from the proximal right coronary artery (RCA) in the right atrioventricular groove.
Key takeaways
Rupture of a coronary artery aneurysm is an extremely rare and life-threatening cause of hemopericardium and rapid cardiac tamponade. Immediate surgical intervention is required, and survival is possible if the hemorrhage is temporarily self-contained or tamponaded off prior to definitive repair.
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