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04:30
A Murine Model of Stent Implantation in the Carotid Artery for the Study of Restenosis
Published on: May 14, 2013
Coronary collateral function long after drug-eluting stent implantation
Pascal Meier1, Rainer Zbinden, Mario Togni
1Department of Cardiology, University Hospital, Bern, Switzerland.
Journal of the American College of Cardiology
|January 9, 2007
Summary
Drug-eluting stents (DES) impair coronary collateral function compared to bare-metal stents (BMS) long after implantation. This reduced collateral capacity may increase risks during abrupt coronary occlusion.
Area of Science:
- Cardiovascular Medicine
- Interventional Cardiology
- Biomedical Engineering
Background:
- Drug-eluting stents (DES) may inhibit growth factors crucial for collateral vessel development.
- Coronary collateral circulation is vital for preventing ischemia during occlusive events.
Purpose of the Study:
- To compare coronary collateral function between patients receiving bare-metal stents (BMS) and drug-eluting stents (DES).
Main Methods:
- 120 patients with stable coronary artery disease post-stenting were analyzed.
- Collateral flow index (CFI) was invasively measured 6 months post-implantation.
- Assessment included pressure measurements and intracoronary ECG during balloon occlusion.
Main Results:
- Coronary collateral flow index (CFI) was significantly lower in the DES group compared to the BMS group.
- Patients with DES showed a higher incidence of insufficient collaterals to prevent ischemia during occlusion.
- No significant differences were observed in baseline characteristics or stenosis severity between groups.
Conclusions:
- Drug-eluting stents (DES) are associated with impaired coronary collateral function compared to bare-metal stents (BMS).
- Reduced collateral function following DES implantation could increase the risk of adverse cardiac events during acute coronary occlusion.
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