CTICasesCoronary Artery Pseudoaneurysm
Imaging findings
Contrast-enhanced CT and MR perfusion sequences show a localized contrast-filled collection directly adjacent to a thrombosed native right coronary artery. The native artery is retrogradely filled from a nearby bypass graft, and the pseudoaneurysm fills during the systemic arterial phase.
Key takeaways
Coronary artery pseudoaneurysms are rare and can be caused by infection (such as Staphylococcus bacteremia), angioplasty, or surgery. Differentiating them from right ventricular pseudoaneurysms on non-gated CT can be difficult; however, utilizing gated cardiac MRI or identifying arterial-phase filling on perfusion sequences helps confirm the diagnosis.
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