NASCET
Pronunciation: NAS-set
Also written as: NASCET — North American Symptomatic Carotid Endarterectomy Trial
North American Symptomatic Carotid Endarterectomy Trial measurement method for quantifying carotid artery stenosis severity.
Full Definition
NASCET refers to both the landmark clinical trial and the specific measurement technique it established for grading carotid stenosis severity. The NASCET method calculates stenosis percentage by comparing the narrowest point of the internal carotid artery to the normal diameter of the distal internal carotid artery beyond the bulb. This measurement standard differs from European Carotid Surgery Trial (ECST) methodology and has become the predominant grading system in North American vascular imaging. The technique is critical for determining surgical candidacy and comparing research outcomes across institutions.
Usage
Usage note: Always specify NASCET method when reporting carotid stenosis measurements to avoid confusion with other grading systems.
In Context
- "NASCET grading revealed 70% stenosis of the right internal carotid artery origin." — Carotid angiography report
- "Using NASCET criteria, the stenosis measured 85%, qualifying the patient for carotid endarterectomy." — Vascular surgery consultation