Coronary stent
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Evolution of Coronary Stent Technology
Coronary stents have dramatically changed the treatment of coronary artery disease over the past four decades. Initially, balloon angioplasty was used, but it often led to abrupt vessel closure and recoil. The introduction of bare metal stents (BMS) in the 1980s provided a permanent scaffold to keep arteries open, reducing these risks and improving outcomes compared to balloon angioplasty alone 1457. However, restenosis—where the artery narrows again—remained a significant problem, with about 15% of patients needing repeat procedures .
Drug-Eluting Stents (DES): Reducing Restenosis and Improving Outcomes
The development of drug-eluting stents (DES) was a major breakthrough. These stents release antiproliferative drugs from polymer coatings, significantly lowering the risk of restenosis compared to BMS 1246+2 MORE. Early DES, such as sirolimus- and paclitaxel-eluting stents, greatly reduced the need for repeat revascularization but were associated with delayed arterial healing and a higher risk of late stent thrombosis 249.
Newer generations of DES have addressed these safety concerns by using thinner struts, more biocompatible or biodegradable polymers, and improved drug formulations. These advances have led to lower rates of stent thrombosis and even better long-term effectiveness, making modern DES the standard of care for most patients and lesion types 1247+1 MORE.
Materials, Design, and Biomechanics of Coronary Stents
Coronary stents are made from various metal alloys and polymers, with ongoing research focused on optimizing their mechanical properties and biocompatibility. The design and geometry of stents have evolved to improve deliverability, flexibility, and support for the vessel wall, allowing their use in more complex and smaller vessels 1357. Simulation and numerical modeling are increasingly used to refine stent designs and predict their behavior in the body .
Complications and the Role of Dual Antiplatelet Therapy
While stents have reduced the risk of acute vessel closure and restenosis, complications such as stent thrombosis and restenosis still occur, though at much lower rates with modern DES 2459. Dual antiplatelet therapy (typically aspirin and clopidogrel or ticlopidine) is recommended to prevent stent thrombosis, especially in the months following stent implantation 45.
Future Directions: Bioresorbable Scaffolds and Novel Technologies
Research continues to focus on developing even safer and more effective stents. Innovations include fully bioresorbable vascular scaffolds, stents with novel coatings, and polymer-free or biodegradable polymer DES. These new devices aim to further reduce complications and improve healing, with early results showing promise 12410. There is also ongoing work to develop pro-healing stents and to optimize the selection of stents and duration of antiplatelet therapy for individual patients 410.
Conclusion
Coronary stents have revolutionized the management of coronary artery disease, evolving from simple metal scaffolds to sophisticated drug-eluting devices with excellent safety and efficacy. Ongoing research and technological advancements continue to improve outcomes, reduce complications, and expand the range of patients who can benefit from this life-saving technology 1234+5 MORE.
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Coronary stents: novel developments
Newer generation drug-eluting stents (DES) with thinner stent struts, durable or biodegradable coatings, and new limus antiproliferative agents significantly reduce the risk of stent thrombosis while maintaining their effectiveness and long-term results.
[Coronary stents].
Stents have become a common treatment for coronary artery disease due to favorable acute and long-term results, shorter procedure times, and reduced restenosis rates, but drug-eluting stents show promise in eliminating this issue.
State of the art: coronary artery stents - past, present and future.
Coronary stent technology has revolutionized heart disease treatment over the last 40 years, with advances in metallic stents, drug-eluting stents, and bare metal stents.
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