intima-media thickness
Also written as: IMT — Intima-Media Thickness
Ultrasound measurement of arterial wall thickness used as a marker of subclinical atherosclerosis and cardiovascular risk assessment.
Full Definition
Intima-media thickness (IMT) is a high-resolution ultrasound measurement of the combined thickness of the arterial intimal and medial layers, most commonly assessed in the carotid arteries. This non-invasive measurement serves as a marker of subclinical atherosclerosis and is used for cardiovascular risk stratification, particularly in asymptomatic individuals. Normal IMT values vary by age, gender, and arterial location, with increased thickness correlating with traditional cardiovascular risk factors. IMT progression over time can be monitored to assess treatment efficacy and disease progression.
Usage
Usage note: Report measurement location and technique used, as values vary significantly by arterial segment.
In Context
- "The increased intima-media thickness of 1.2 mm suggested accelerated atherosclerotic disease." — Cardiovascular risk assessment
- "Serial intima-media thickness measurements showed progression despite optimal medical therapy." — Longitudinal monitoring study