Spontaneous resolution of new coronary artery aneurysm following guideline-directed medical therapy after drug-eluting stent implantation

Here, we present a case of 56-year-old man with acute myocardial infarction. The patient underwent percutaneous coronary intervention (PCI) at the left main bifurcation and mid-left anterior descending artery using drugeluting stents. Four months after PCI, was readmitted for cardiac arrest. Coronary angiography (CAG) revealed stent thrombosis in main-toproximal in-stent restenosis circumflex artery. We performed balloon angioplasty to proximal stents; subsequently, blood flow fully restored. However, contrast agent extravasation observed outside mid-portion stent, indicating presence aneurysm (CAA) stent. After guideline-directed medical therapy dual antiplatelet agents high-intensity statins, follow-up CAG near-resolution CAA, absence stenotic lesions, good flow.