International Heart Journal
Online ISSN : 1349-3299
Print ISSN : 1349-2365
ISSN-L : 1349-2365
Clinical Studies
Drug-Eluting Stent Implantation Could Be Associated With Long-Term Coronary Endothelial Dysfunction
Comparison Between Sirolimus-Eluting Stent and Paclitaxel-Eluting Stent
Dong Il ShinPum Joon KimKi-Bae SeungDong Bin KimMi-Jeong KimKiyuk ChangSung Min LimDoo Soo JeonWook Sung ChungSang Hong BaekMan Young Lee
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2007 Volume 48 Issue 5 Pages 553-567


Drug-eluting stent (DES) implantation may be associated with endothelial dysfunction. However, changes in long-term endothelial function based on the type of DES remain largely unknown. We assessed coronary endothelial function after DES implantation compared to bare-metal stents (BMS) and determined the differences according to DES type.
Patients who had single BMS or DES implantation in the left anterior descending artery and showed no restenosis in follow-up angiography at 6 to 9 months were assigned to the BMS group (5 patients) or DES group (9 sirolimus-eluting stents, SES, and 8 paclitaxel-eluting stents, PES). Endothelium-dependent vasomotion, after intracoronary infusion of acetylcholine, was determined by quantitative coronary angiography. Also, endothelium-independent vasomotion was assessed after nitrate infusion.
In the distal and far distal segments, the SES (SES versus BMS, distal: -27.6 ± 16.3% versus -0.6 ± 1.6%; P = 0.01, far distal: -24.8 ± 13.2% versus -0.9 ± 1.3%; P = 0.02) and PES groups (PES versus BMS, distal: -25.4 ± 17.1% versus -0.6 ± 1.6%; P = 0.01, far distal: -26.6 ± 15.9% versus -0.9 ± 1.3%; P = 0.01) had similar patterns showing significant vasoconstriction compared with the BMS group. In addition, the DES group showed a significant reduction of diameter in distal (SES: P = 0.001, PES: P = 0.04) and far distal segments (SES: P = 0.002, PES: P = 0.001) compared with proximal and near proximal segments. However, the BMS group did not demonstrate significantly different vasomotion between proximal and distal segments. Vasodilatation by nitrate infusion was preserved in all subjects.
SES or PES implantation could be associated with the similar pattern of endothelial dysfunction identified predominantly in the long distal portion of the treated vessel.

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© 2007 by the International Heart Journal Association
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