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[Endothelial function in coronary segments previously treated with balloon angioplasty]
J A Gómez-Hospital1, M S Tenas, A Cequier Fillat
1Unidad de Hemodinámica y Cardiología Intervencionista. Servicio de Cardiología. Hospital de Bellvitge. Universidad de Barcelona, Spain. jagomezh@csub.scs.es
Insights
Six months after coronary angioplasty, most patients without restenosis showed normal endothelial function in the treated artery. Greater residual stenosis correlated with better endothelial function.
Area of Science:
- Cardiovascular research
- Endothelial function studies
- Interventional cardiology
Context:
- Coronary angioplasty can disrupt the endothelium, necessitating re-endothelialization.
- Assessing endothelial function post-angioplasty is crucial for understanding vascular healing.
- Restenosis remains a concern after coronary interventions.
Purpose:
- To evaluate endothelial function in coronary segments previously treated with angioplasty.
- To determine if endothelial function is preserved in the absence of restenosis.
- To explore the relationship between residual stenosis and endothelial function.
Summary:
- Endothelium-dependent vasomotion was assessed using acetylcholine in 12 patients six months after angioplasty.
- Quantitative coronary angiography measured vasomotor response in treated arteries compared to controls.
- A global vasodilator response was observed in the dilated segment, with most patients showing normal endothelial function.
Impact:
- Dilated coronary segments frequently exhibit normal endothelial function post-angioplasty if restenosis is absent.
- Increased residual stenosis at six months was associated with less endothelial dysfunction.
- Findings suggest complex vascular healing dynamics after coronary angioplasty.
Introduction And Objectives:
Coronary angioplasty leads to endothelial disruption and a further rendotelization. The aim of our study was to determine the status of endothelial function in previously dilated coronary segments without restenosis.
Methods:
Endothelium-dependent vasomotion was analysed in twelve patients with single vessel coronary disease six month after angioplasty by selective intracoronary doses of acetylcholine (10-6, 10-5, 10-4 M) in the previously treated artery. The control group was made up of seven patients with no evidence of significant coronary stenosis and without risk factors. Vasomotor response at the different doses of acetylcholine was determined by quantitative coronary angiography.
Results:
Endothelial function showed a global vasodilator response in the dilated segment at the maximum dose of acetylcholine (increase in lumen diameter 3.6 +/- 3.5%), similar to the response observed in the control group (increase of luminal diameter 3 +/- 6%; p = NS). In particular, 8 patients (67%) showed a normal endotelial function, while 4 patients (33%) showed a vasoconstrictor response. A positive correlation was detected between the response to the maximun dose of acetylcholine and the percent of residual stenosis at 6 months of follow-up (r = 0.67; p = 0.02).
Conclusions:
In patients treated with coronary angioplasty without restenosis, the dilated segments frequently showed normal endothelial function. Greater residual stenosis at the dilated segment was associated with less impairment in endothelial function.