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Updated: Jun 11, 2026
A Murine Model of Stent Implantation in the Carotid Artery for the Study of Restenosis
Published on: May 14, 2013
Coronary microvascular endothelial function deteriorates late (12 months) after sirolimus-eluting stent implantation
Yoshinori Miyamoto1, Hiroyuki Okura, Teruyoshi Kume
1Department of Cardiology, Kawasaki Medical School, 577 Matsushima, Kurashiki 701-0192, Japan. miyamo@med.kawasaki-m.ac.jp
Background:
Coronary flow velocity reserve (CFVR) may reflect coronary microvascular endothelial function in the absence of significant epicardial coronary artery stenosis. The purpose of this study was to evaluate coronary microvascular endothelial function late (6 and 12 months) after sirolimus-eluting stent (SES) implantation using transthoracic Doppler echocardiography.
Methods And Results:
A total of 21 lesions from 21 patients with significant left anterior descending artery stenosis who underwent percutaneous coronary intervention (PCI) with SES were enrolled and studied. As a control group, 10 patients who were treated with bare metal stent (BMS) were also studied. CFVR was measured at 6 and 12 months after PCI. Coronary angiography was also performed at 6 and 12 months (SES only) after stenting. Between 6 and 12 months after SES implantation, there was no significant difference in angiographical diameter stenosis. On the other hand, CFVR significantly decreased between 6 and 12 months in the SES group (2.5±0.5 vs. 2.2±0.5, p<0.01), but not in the BMS group (2.3±0.4 vs. 2.5±0.3, p=0.1).
Conclusions:
Coronary microvascular endothelial function may deteriorate between 6 and 12 months after SES implantation.