Recommendations for Low-Grade Carotid Stenosis Follow-up Based on a Single-Institution Database

Area of Science:

• Vascular Medicine
• Diagnostic Imaging
• Cardiovascular Health

Background:

• Carotid stenosis is a significant risk factor for stroke.
• Current guidelines recommend intervention for severe stenosis, but follow-up for non-interventional degrees varies.
• Understanding progression rates is crucial for optimizing patient management and resource allocation.

Purpose of the Study:

• To determine the incidence and progression rates of varying degrees of carotid stenosis not requiring intervention.
• To establish evidence-based recommendations for follow-up imaging intervals based on stenosis severity.

Main Methods:

• Retrospective review of carotid ultrasound examinations (January 1995 - April 2015).
• Classification of stenosis severity using modified Bluth et al. criteria.
• Kaplan-Meier survival analysis to assess stenosis progression and inform follow-up recommendations.

Main Results:

• 91.6% of analyzed carotid arteries showed 1-39% stenosis.
• Progression occurred in only 6.8% of arteries with 1-39% stenosis, compared to 38.9% with 40-59% stenosis.
• A table of evidence-based follow-up recommendations for different stenosis levels is presented.

Conclusions:

• Evidence-based follow-up recommendations are provided for low-degree carotid stenosis.
• Different stenosis severities exhibit distinct progression rates, necessitating varied follow-up intervals.
• The low progression rate in the majority of patients (1-39% stenosis) suggests carotid ultrasound may not be overutilized for these cases.