Development and Receding of a Coronary Artery Aneurysm After Implantation of a Fully Bioresorbable Scaffold

A 83-year-old man included in the ABSORB cohort B trial underwent successful percutaneous coronary intervention of the middle left anterior descending artery with a 3.0×18-mm bioresorbable scaffold (Absorb, Abbott Vascular, CA) that was postdilated with a 3.0-mm noncompliant balloon at 24 atm (Figure 1A and 1B). The 2-dimensional and 3-dimensional (3D) optical coherence tomography (OCT) confirmed the absence of structural discontinuity after the procedure (Figure 2B and Figure 3A’). At 6 months, the planned angiography showed the absence of restenosis but an ectasia in the scaffolded segment (Figure 1C). Intravascular ultrasound revealed a focal vessel and lumen enlargement (17.93 mm2 [Δ+20.5%] and 6.99 mm2 [Δ+9.6%], respectively, in the matched cross-section analysis; Figure 2C), whereas 3D OCT suggested a deformation of the scaffold in the 2-mm segment of the ectasia (Figure 3B’). At 18 months, the planned multislice computed tomography showed lumen dilatation in the scaffolded segment (Figure 1D). At 2 years, on angiography, the ectatic lesion in the scaffold became aneurysmal (50% increase compared with the …