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Published on: May 14, 2013
[The influence of coronary main vessel stenting on side branches]
Qin-hua Jin1, Lu-yue Gai, Hong-bin Liu
1Cardiovascular Department, China PLA General Hospital, Beijing 100853, China.
Insights
Drug-eluting stents (DES) and bare-metal stents (BMS) showed similar effects on side branches during coronary stenting. Most occluded side branches experienced spontaneous reperfusion with a benign clinical course.
Area of Science:
- Cardiovascular Medicine
- Interventional Cardiology
- Biomedical Engineering
Context:
- Coronary artery stenting is a common procedure to treat atherosclerotic disease.
- Side branch involvement during main vessel stenting can lead to complications.
- Different stent types, including bare-metal stents (BMS) and drug-eluting stents (DES), have varying characteristics.
Purpose:
- To assess the impact of main vessel stenting on coronary side branches.
- To compare the effects of BMS versus DES (specifically Taxus and Cypher) on jailed side branches.
- To identify predictors of side branch occlusion post-stenting.
Summary:
- A review of 183 patients with coronary stenting revealed side branch occlusion in 8.9% of cases.
- Occlusion rates were similar across BMS, Taxus DES, and Cypher DES groups (7.8%, 11.1%, and 10.5%, respectively).
- Spontaneous recanalization occurred in 72% of occluded side branches, with higher rates in the Cypher DES group (90.9%). Ostial stenosis and lesion involvement at the side branch origin predicted occlusion.
Impact:
- DES implantations in coronary main vessels had comparable effects on side branches, with no significant difference compared to BMS.
- Side branch occlusion following stenting generally follows a benign clinical course.
- Late spontaneous reperfusion is common in occluded side branches, suggesting a favorable prognosis.
Objective:
To evaluate the influence of stenting main vessel on side branches and to compare the different effects on side branches between BMS and DES (Taxus and Cypher).
Methods:
We reviewed the angiograms and the medical records of 183 patients who had received stent implantation in coronary main vessels and had follow-up angiograms. Any side branch was jailed by stent was evaluated.
Results:
Side branch occlusion occurred in 8.9% in all branches (10.5% in Cypher DES group, 11.1% in Taxus DES group and 7.8% in BMS group). Spontaneous recanalization of side branches was observed in 72% (90.9% in Cypher DES, 66.7% in Taxus stent group and 66.7% in BMS). The ostial side branch stenosis before stenting and the involvement of the side branch origin within the lesion of the parent vessel are the major independent predictors for side branch occlusion.
Conclusions:
The influence of different DES implantations in coronary main vessels on side branches were similar and there was no difference between DES and BMS. Side branch occlusion had relatively benign clinical course. Most occluded side branches had late spontaneous reperfusion.
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