The acronym ACST is associated with evaluating 60% stenosis in which vessels?

• A. Symptomatic Carotid Stenosis Trial
• B. Carotid Artery Disease Evaluation Study
• C. Atherosclerotic Plaque Study
• D. Asymptomatic Carotid Atherosclerosis Study

Answer: (B)

ACST refers to a study focused on carotid artery disease evaluation. It is associated with assessing significant narrowing in the carotid arteries, around 60%, to understand the role of intervention versus medical therapy in reducing stroke risk. The vessels involved are the carotid arteries, especially the internal carotid segments that supply the brain. The 60% stenosis threshold is a common inclusion criterion in carotid trials because it represents a level at which the balance of risks and benefits of treatment becomes clinically relevant. Among the options, the Carotid Artery Disease Evaluation Study best matches this concept, describing a study about evaluating carotid disease, whereas the other titles refer to different topics.