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[Coronary atherectomy. An essential tool for specific indications]
1IFR Coeur-Vaisseaux-Thrombose Inserm 4, CNRS FR21, CHU de Bordeaux, Bordeaux-Pessac.
Insights
Atherectomy complements angioplasty and stenting for complex arterial lesions, particularly bifurcations and calcified plaques. While not preventing restenosis, it improves outcomes in specific cases, including potential intra-stent stenosis treatment.
Area of Science:
- Interventional Cardiology
- Vascular Surgery
- Medical Device Technology
Context:
- Stent manufacturing advances have expanded angioplasty indications and reduced immediate complications.
- Intra-stent restenosis and complex lesions remain significant challenges in percutaneous coronary interventions.
- Atherectomy techniques are being re-evaluated for specific complex lesion subsets.
Purpose:
- To review the current role and indications of atherectomy in interventional cardiology.
- To assess the effectiveness of atherectomy as an adjunct to angioplasty and stenting.
- To explore potential new applications for atherectomy, such as intra-stent stenosis.
Summary:
- Atherectomy has not demonstrated efficacy in limiting restenosis but is crucial for treating bifurcation lesions and complex, calcified plaques inaccessible to balloon angioplasty.
- Rotational atherectomy remains essential for undilatable lesions and heavily calcified atheroma, with potential for intra-stent stenosis.
- Directional atherectomy is indicated for non-calcified ostial stenosis and large artery bifurcations; combination with stenting shows promise requiring further validation.
Impact:
- Atherectomy techniques provide valuable options for interventional cardiologists when dealing with specific challenging coronary anatomies.
- These adjunctive therapies can potentially improve long-term outcomes in select patient populations undergoing angioplasty and stenting.
- Further research is needed to confirm the benefits of atherectomy, especially in combination with modern stenting strategies.
Abstract:
Technological advances in the manufacturing of stents have extended the indications of angioplasty and considerably reduced the immediate complications, death and myocardial infarction. Nevertheless, intra-stent restenosis remains a problem and some complex lesions are still inaccessible. Atherectomy has not been shown to be effective in limiting restenosis but it has a primordial role in the treatment of lesions of bifurcation and could improve long-term results as a complement of angioplasty and stenting. Rotational atherectomy is still useful, even essential, for lesions which cannot be passed with the balloon and for calcified plaques of atheroma. A possible new indication may be the treatment of intra-stent stenosis. The indications of directional atherectomy are more limited, mainly non-calcified ostial stenosis and of bifurcations of large arteries. The association with stenting has given encouraging results which require confirmation. These techniques have a place in the in the angioplasty physician's arsenal even though they are reserved for specific anatomical situations.