Early and late geometric changes after carotid endarterectomy patch reconstruction

Area of Science:

• Vascular Surgery
• Vascular Imaging
• Cardiovascular Research

Background:

• Carotid endarterectomy is a common procedure to prevent stroke.
• Patch angioplasty is frequently used for reconstruction after carotid endarterectomy.
• Long-term geometric changes after patch reconstruction require further investigation.

Purpose of the Study:

• To assess the degree and location of vessel wall geometric changes after carotid endarterectomy with vein patch reconstruction.
• To evaluate changes in carotid artery diameters and identify restenosis development.
• To determine the incidence of aneurysms or occlusions post-procedure.

Main Methods:

• Intraoperative caliper measurements of carotid artery diameters in 349 patients.
• Postoperative B-mode ultrasound studies with cross-sectional views.
• Follow-up measurements from 3 months to 5 years after surgery.
• Analysis of vein patch, synthetic patch, and primary closure reconstructions.

Main Results:

• Internal carotid artery diameters increased by 20-30% after vein or synthetic patch reconstruction.
• This dilation was observed early and progressed slightly over 5 years.
• Wall thickening and mild eccentric stenosis (<50%) were common, primarily on the posterior-medial wall.
• No aneurysms or internal carotid occlusions were identified.

Conclusions:

• Carotid endarterectomy with vein patch reconstruction results in early, mild internal carotid artery dilation.
• Frequent mild eccentric restenosis occurs, but significant concentric restenosis is rare.
• The observed changes are generally non-aneurysmal and do not lead to occlusion.