Atherosclerotic calcification and intimal medial thickness of the carotid arteries.
OBJECTIVE
Carotid intimal medial thickness (IMT) is a measure of subclinical atherosclerosis and is predictive of future cardiovascular events. The purpose of this study was to determine the significance and magnitude of association between IMT and atherosclerotic calcification of the carotid arteries.


METHODS
Forty-five subjects underwent electron beam computed tomography of the neck to ascertain the extent of atherosclerotic calcification in the carotid arteries followed by B-mode carotid ultrasonography for IMT.


RESULTS
The mean age, BMI and total cholesterol to HDL ratio were 61.4, 26.2 and 4.3, respectively. Forty-one percent were women. The overall mean IMT was 0.91 mm with the mean for the right and left being 0.93 and 0.87 mm, respectively. The median total carotid calcium score (CCS) was 48.4 [range: 0-973]. Age-adjusted correlations were significant between the overall mean IMT and total CCS (r=0.53, p<0.01), mean right IMT and right CCS (0.31, 0.05), mean left IMT and left CCS (0.31, 0.05), right common carotid IMT and right CCS (0.53, <0.01) and left common carotid IMT and left CCS (0.31, 0.05). The mean IMT was 0.14 mm greater in subjects with any carotid calcification adjusted for risk factors. A 0.05 mm increase in the carotid IMT was associated with an approximate 3-fold increase in risk for the presence of atherosclerotic calcification.


CONCLUSIONS
Carotid IMT is significantly correlated with and predictive of atherosclerotic calcification. Conversely, individuals with any carotid calcification have significantly greater intimal medial thicknesses.
Allison
Matthew A
MA
University of California at San Diego, 8950 Villa La Jolla Drive, Suite C203, La Jolla, CA 92037, USA. mallison@ucsd.edu
Tiefenbrun
Jonathan
J
Langer
Robert D
RD
Wright
C Michael
CM
D000368:Aged; D002114:Calcinosis / Q000000981:diagnostic imaging*; D002340:Carotid Artery Diseases / Q000000981:diagnostic imaging*; D017536:Carotid Artery, Common / Q000000981:diagnostic imaging; D002343:Carotid Artery, Internal / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D012372:ROC Curve; D012189:Retrospective Studies; D012307:Risk Factors; D012720:Severity of Illness Index; D014057:Tomography, X-Ray Computed; D017539:Tunica Intima / Q000000981:diagnostic imaging*; D014463:Ultrasonography