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Updated: May 5, 2026
A Murine Model of Stent Implantation in the Carotid Artery for the Study of Restenosis
Published on: May 14, 2013
Exercise-induced coronary artery vasodilation is not impaired by stent placement
Willibald Maier1, Stephan Windecker, Adrian Küng
1Department of Cardiology, Swiss Cardiovascular Center, Bern, Switzerland.
Insights
Coronary stenting eliminates vasomotion in the stented region but preserves normal vasodilation in adjacent segments during exercise. This study assessed coronary artery vasomotion after stent placement under physiological stress.
Area of Science:
- Cardiology
- Interventional Cardiology
- Vascular Physiology
Background:
- Coronary stenting is beneficial for treating threatened closure and reducing restenosis post-angioplasty.
- Metallic coronary prostheses have been linked to impaired vasomotion distal to the stent.
- Acetylcholine infusion previously assessed impaired vasomotion.
Purpose of the Study:
- To determine vasomotion of stented coronary arteries.
- To assess the influence of stenting on adjacent vessel vasomotion during bicycle exercise.
Main Methods:
- Biplane quantitative coronary angiography performed at rest and during bicycle exercise.
- Study included 26 patients with coronary artery disease (12 controls, 14 stented).
- Analysis of minimal luminal area, stent area, and proximal/distal vessel areas.
Main Results:
- Control arteries showed exercise-induced vasoconstriction in stenotic segments and vasodilation in normal segments.
- Stented segments exhibited abolished vasomotion (0+/-1%).
- Proximal and distal segments in stented patients showed normal exercise-induced vasodilation, comparable to controls.
Conclusions:
- Coronary stent placement abolishes vasomotion within the stented region.
- Adjacent proximal and distal segments maintain normal vasodilation during physiological stress (exercise).
- Findings contrast with vasoconstriction observed in control patients' stenotic arteries.
Background:
Stenting has proved beneficial for treating threatened closure and reducing restenosis after balloon angioplasty. However, the implantation of a coronary metallic prosthesis has been related to impaired vasomotion distal to the stent as assessed by acetylcholine infusion. Thus, the purpose of the present study was to determine the vasomotion of stented coronary arteries and to assess its influence on the vasomotion of adjacent vessel segments during bicycle exercise.
Methods And Results:
Biplane quantitative coronary angiography was performed at rest and during bicycle exercise in 26 patients with coronary artery disease. Twelve patients had single vessel disease with stable angina pectoris (controls; group 1). Fourteen patients underwent coronary stenting for therapeutic reasons and were studied 10+/-3 months after the intervention (group 2). Minimal luminal area, stent area, and proximal and distal vessel areas were determined. In controls (group 1), vasoconstriction of the stenotic artery (- 29+/-4%; P<0.001) was observed during exercise, whereas the normal segment showed vasodilation (15+/-4%; P<0.05). In group 2, vasomotion of the stented segment was eliminated (0+/-1%), whereas the proximal and distal segments showed exercise-induced vasodilation (8+/-2% and 11+/-3%, respectively; P<0.005), which was not different from control segments (10+/-2%). Sublingual nitroglycerin was associated with maximal vasodilation of the proximal and distal vessel segments (30+/-8% and 38+/-13%, respectively; P<0.005).
Conclusions:
In contrast to the vasoconstriction of vessels in control patients, normal vasodilation of proximal and distal segments occurred during the physiological stress of exercise in patients with coronary stent placement. As expected, vasomotion was abolished in the stented region.
