Abstract
A 74-year-old woman presented with effort-induced chest pain. Diagnostic coronary angiography revealed three-vessel disease. A successful angioplasty was performed with two sirolimus-eluting stents placed in the left anterior descending artery (LAD) and left circumflex artery (LCX). The right coronary artery (RCA) was treated with a bare-metal stent. Follow-up angiography and intravascular ultrasound (IVUS) assessment were performed 8 months later, which showed late stent malapposition (LSM) with marked positive vascular remodeling around the drug-eluting stents (DES) in both LAD and LCX lesions, but there was no evidence of ectatic area around the BMS in the RCA lesion. Compared with the baseline IVUS, a significant increase in external elastic membrane (EEM) cross-sectional area was found. Twenty-seven months later, we performed repeat follow-up angiography. Intravascular ultrasound still showed vessel malapposition. A previous report showed that aneurysmal dilatation of the stented segment with severe localized hypersensitivity reaction could be a potential cause of late thrombosis after DES implantation. If LSM is related to hypersensitivity of the DES, it may have a potential risk of adverse events. Although there is a paucity of data regarding malapposition as the cause of adverse events, careful long-term follow-up of patients with vessel enlargement after DES placement is recommended.
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Watanabe, Y., Asano, R., Hata, N. et al. Late stent malapposition with marked positive vascular remodeling observed only at the site of drug-eluting stents after multivessel coronary stenting. Heart Vessels 24, 308–312 (2009). https://doi.org/10.1007/s00380-008-1124-z
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DOI: https://doi.org/10.1007/s00380-008-1124-z