What is normal IMT?

In healthy adults, IMT ranges from 0.25 to 1.5 mm,24 and values >1.0 mm are often regarded as abnormal. IMT has been proposed as a quantitative index of atherosclerosis of value in monitoring disease progression and the effects of treatment and as a surrogate end point in clinical trials.

What is the normal carotid intima-media thickness?

Normal carotid intima-media thickness for middle-aged, healthy adults is usually between 0.6-0.7 millimeters. Test results showing a thickness of more than 1.0 millimeter may mean you have a high risk of cardiovascular disease.

How is intima-media thickness measured?

Intima-media thickness (IMT) definition – IMT is measured as the distance between lumen-intima (yellow line) and media-adventitia (pink line) interfaces.

How is carotid intima-media thickness measured?

A carotid intima-media thickness test (CIMT), also known as a carotid artery IMT ultrasound scan, uses ultrasound to measure the thickness of the intima and media, the two inner layers of the carotid artery.

What is intima-media ratio?

Intima–media thickness (IMT), also called intimal medial thickness, is a measurement of the thickness of tunica intima and tunica media, the innermost two layers of the wall of an artery. The measurement is usually made by external ultrasound and occasionally by internal, invasive ultrasound catheters.

What is aortic intima-media thickness?

The mean aortic IMT was 0.63 mm (SD 0.14) for males and 0.61 mm (SD 0.13) for females while the mean carotid IMT was 0.50 (SD 0.04) mm and 0.49 (SD 0.04) mm respectively. Images were analyzed in 95% of participants.

What is a good CIMT score?

Based on some large population studies, normal CIMT values were defined. CIMT above the 75th percentile of average for the age, gender and ethnicity or absolute thickness more than 1.0 mm are considered an abnormal result, and people with IMT in less than the 50th percentile are classified in the low risk group.

How do I lower my IMT?

Overall, treatment with ACE inhibitors has been shown to reduce IMT progression.

Where do you measure IMT?

Measurement of IMT IMT can be measured using external ultrasound in large arteries relatively close to the skin (e.g. the carotid, brachial, radial, or femoral arteries). External ultrasound methods have the advantage of being non-invasive, comparatively low cost and convenient.

How do you read Cimt results?

How accurate is a CIMT test?

CIMT measurements by ultrasound may be used for the assessment of AS and risk to develop CAD. Current findings indicate 78% sensitivity and 75% specificity, which shows that it is able to correctly diagnose the disease with accuracy.

What is intima media ratio?

What is an IMT test?

The test measures the thickness of the inner two layers of the carotid artery—the intima and media—and alerts physicians to any thickening when patients are still asymptomatic. Early detection may indicate the need for a more aggressive approach to managing the risk factors associated with heart disease and stroke.

How much does a CIMT test cost?

It costs about $250 to $300, and many insurer providers don’t cover it. The clinical significance of the test needs more evaluation. It may promote excess testing. Not all cardiologists are well-trained in interpreting the results of the test.

What is intimal thickening of artery?

Carotid intima‐media thickness (cIMT) is a measure of hypertrophy of the wall of the carotid arteries involving thickening of the intima and media layers and is a widely used, noninvasive early indicator of subclinical vascular disease.

What causes intima-media thickness?

Aging is a contributing factor to increased carotid intima-media thickness. Other risk factors include high lipoprotein levels, high blood pressure, smoking, diabetes, obesity and a sedentary lifestyle.

What is the normal ICA CCA ratio?

Table 1. Society of Radiologists in Ultrasound Consensus Criteria for Carotid Stenosis 23

	Primary parameters	Secondary parameters
Degree of stenosis, %	ICA PSV, cm/sec	ICA/CCA PSV ratio
Normal	<125	<2.0
<50	<125	<2.0
50-69	125-230	2.0-4.0

How do I reduce intima-media thickness?

One-Year Treatment with Rosuvastatin Reduces Intima-Media Thickness in 45 Hypercholesterolemic Subjects with Asymptomatic Carotid Artery Disease. Riccioni G.

What is CCA and ICA?

CCA = common carotid artery; EDV = end diastolic velocity; ICA = internal carotid artery; PSV = peak systolic velocity. From Grant E G, Benson C B, Moneta G L, et al. Carotid artery stenosis: Gray-scale and Doppler US diagnosis—Society of Radiologists in Ultrasound Consensus Conference.

What does 70% stenosis mean?

Usually, a 70 percent stenosis is considered serious enough to warrant treatment with angioplasty, which widens the narrowed portion of the artery by inflation of a tiny balloon, and/or stenting, in which a small metal tube is positioned in the artery to prop it open.

What is intima media thickness?

Intima-media thickness (IMT) is an indirect sonographic assessment of the degree of atheromatous vascular disease of end organs. The thickness of the media and the intima of the vessels changes following many conditions and it can be easily and reliably assessed with ultrasound on B mode in the common carotid arteries (CCA) 1,2 .

What is a normal intima-media thickness for a carotid artery?

An article from the e-journal of the ESC Council for Cardiology Practice. Intima-media thickness values of more than 0.9 mm (ESC) or over the 75th percentile (ASE) should be considered abnormal. Carotid artery ultrasound scan is the method of choice and results are reliable provided certain standards are followed.

Is intima-media thickness a marker of subclinical atherosclerosis?

Intima-media thickness is an important atherosclerotic risk marker. However, this increase is not synonymous with subclinical atherosclerosis, but is related to it.

What is the optimal focus depth for the IMT?

Focus depth (30-40 mm), frame rate (>15-25 Hz) and gain settings adjusted optimally to facilitate edge detection; Use of a zoom function is discouraged (most of the studies relating IMT to cardiovascular events have not used zoomed images).