Our news editors obtained a quote from the research from Kurume University, "We hypothesized that poor neointimal coverage after DES implantation may be associated with endothelial dysfunction distal to the stent site. Sixty-six stable angina patients treated with a first-generation DES were enrolled. At 9-month follow-up, coronary endothelial function was evaluated with intracoronary infusion of incremental doses of acetylcholine (10(-8), 10(-7), and 10(-6) mol/l) and nitroglycerin (200 mu g). Vascular responses at the segments proximal and distal to the stent site were angiographically and quantitatively measured. At the same time, the degree of neointimal coverage was evaluated using coronary angioscopy and classified into 4 grades: 0 (no coverage) to 3 (full coverage). We divided the subjects into poor-coverage (grades 0 to 1, n = 33) and good-coverage (grades 2 to 3, n = 33) groups. Acetylcholine induced dose-dependent coronary vasoconstrictions in both groups. At the segment distal to the stent, the magnitude of vasoconstriction to acetylcholine in the poor-coverage group was significantly greater than in the good-coverage group (p < 0.001), whereas vasomotor responses proximal to the stent and vasodilation by nitroglycerine were similar between the 2 groups."
According to the news editors, the research concluded: "Coronary endothelial dysfunction distal to the stent was associated with poor neointimal coverage after DES implantation."
For more information on this research see: Coronary Endothelial Dysfunction Distal to Stent of First-Generation Drug-Eluting Stents. Jacc-Cardiovascular Interventions, 2012;5(9):966-973. Jacc-Cardiovascular Interventions can be contacted at: Elsevier Science Inc, 360 Park Ave South, New York, NY 10010-1710, USA.
The news editors report that additional information may be obtained by contacting Y. Mitsutake, Kurume University, Sch Med, Center Biostat, Kurume, Fukuoka 8300011, Japan.
Keywords for this news article include: Asia, Japan, Fukuoka, Acetylcholine, Biogenic Amines, Cardiovascular Interventions
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