Reproducibility of measurements of intima-media thickness and distensibility in the common carotid artery

Kanters, S. D. J. M.; Elgersma, Otto E. H.; Jd, Banga; Leeuwen, Maarten S. van; Algra, Ale

doi:10.1016/s1078-5884(98)80088-9

Cited by 67 publications

(53 citation statements)

References 31 publications

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“…IMTmax is the normal approach in our department and has also been the reference parameter in some studies [20]. However, IMTmean (averaged three IMT measurements in the distal CCA centimeter) is recommended by the ASE for IMT manual quantification [9] and, as our results corroborate, less variable [15,21].…”

Section: Discussionmentioning

confidence: 55%

“…In this scenario, the analysis of carotid US agreements becomes relevant. A number of previous papers have analyzed the reproducibility of manual and automatized carotid IMT measurements [5,11,12,14,20,21]. However, only a few made just a correlation analysis and agreement was not actually assessed [11,12,20].…”

Section: Discussionmentioning

confidence: 99%

“…However, only a few made just a correlation analysis and agreement was not actually assessed [11,12,20]. For other researchers, correlation based on coefficients of variation or difference of means were acceptable [14,21] or very high [5], but the interobserver agreement was not studied in the latter. Unlike those studies, we assessed intra and interobserver agreements with the intraclass correlation coefficient and 95% CI, and agreement, although overall acceptable, was variable.…”

Section: Discussionmentioning

confidence: 99%

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Carotid intima-media thickness and hemodynamic parameters: reproducibility of manual measurements with Doppler ultrasound

et al. 2015

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Aims: To evaluate the carotid ultrasound intra-and interobserver agreements in a common clinical scenario when making manual measurements of the intima-media thickness (IMT) and peak systolic (PSV) and end diastolic (EDV) velocities in the common (CCA) and the internal carotid (ICA) arteries. Material and methods: Three different experienced operators performed two time-point carotid ultrasounds in 21 patients with cardiovascular risk factors. Each operator measured freehand the CCA IMT three consecutive times in each examination. The CCA and ICA hemodynamic parameters were acquired just once. . Intraobserver agreements were fair-moderate for PSVs and good-excellent for EDVs. Interobserver agreements were good-excellent for both PSVs and EDVs. Overall, 95% confidence intervals were narrower for the left IMTmean and CCA velocities. Conclusions: Intra and interobserver agreements in carotid ultrasound are variable. In order to improve carotid IMT agreements, IMTmean is preferable over IMTmax.

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Section: Discussionmentioning

confidence: 55%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Carotid intima-media thickness and hemodynamic parameters: reproducibility of manual measurements with Doppler ultrasound

et al. 2015

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“…The end-diastolic intima-media thickness (IMT) of the far wall of the middle segment of both common carotid arteries, defined by a simultaneous electrocardiographic recording, was measured 1 cm caudal to the bulb, as the distance between the lumen-intima interface and the media-adventitia interface. 13,14 Each measurement was calculated by taking the average of three readings. Intima-media thickening of the common carotid arteries was defined as an average IMT X0.9 mm.…”

Section: Carotid Ultrasonographymentioning

confidence: 99%

Renal resistive index and cardiovascular organ damage in a large population of hypertensive patients

et al. 2007

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We evaluated the relationship between renal resistive index (RRI) of the intrarenal vasculature and cardiovascular (CV) organ damage such as left ventricular hypertrophy (LVH), diastolic dysfunction and carotid atherosclerosis in a large sample of hypertensive patients. 566 hypertensive patients underwent echocardiography with conventional Doppler and Doppler tissue imaging (DTI), carotid and renal ultrasonography. In addition, lipids profile, creatinine in serum, and urinary albumin concentrations were determined. The patients were divided according to their RRI values in 2 groups: o70 and X70. Subjects with high RRI were older, had higher systolic and pulse pressure (PP) and more years of hypertension, compared to those with low RRI (Po0.0001). Patients with the higher RRI showed an increased left ventricular mass index (LVMI) and carotid intima-media thickness (IMT) with a higher prevalence of LVH, carotid plaques and microalbuminuria (Po0.001). There were differences in overall diastolic parameters, in particular when evaluated by DTI (Po0.001). A positive correlation was found between RRI and age, PP, carotid IMT, LVMI, SBP and a negative correlation was found with DTI diastolic parameters (Po0.001). Age, PP, carotid IMT and LVMI were independently related to RRI. While, RRI was independently related to IMT and IVRT. RRI, especially the higher values, are positively correlated with target organ damage in hypertensive patients, indicating that renal vascular resistance is related to morphologic and hemodynamic alteration of the CV system. The evaluation of RRI could predict the presence of early CV damage and provide an accurate estimate of overall risk.

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“…The intraobserver and interobserver coefficient of variability of IMT measurement is reported as being between 3% and 12%. 1,10,11 Whereas IMT measurement is an established surrogate parameter in epidemiologic studies, 6 -9 its role in clinical practice has to be determined.…”

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confidence: 99%

Prediction of Cardiovascular Morbidity and Mortality

Staub¹,

Meyerhans²,

Bundi³

et al. 2006

Stroke

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Background and Purpose-The intima-media thickness (IMT) of the common carotid artery (CCA) is well correlated with the degree of arteriosclerosis and is a predictor of cardiovascular morbidity and mortality. The (hemodynamic) resistive index (RI) of the internal carotid artery (ICA) correlates with the degree of arteriosclerosis just as well as IMT. The aim of the study was to compare the predictive values of RI and IMT with regard to cardiovascular morbidity and mortality. Methods-A total of 146 patients with cardiovascular risk factors or established arteriosclerosis were included. Duplex sonography of the CCA and ICA was performed, and the IMT and RI were measured in both vessels. During follow-up for a median of 36 months, the occurrence of cardiovascular events (myocardial infarction, stroke, or cardiovascular death) was assessed.

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Reproducibility of measurements of intima-media thickness and distensibility in the common carotid artery

Abstract: Our study demonstrates that reproducibility of measurements of IMT and arterial distensibility of the common carotid artery, by B-mode and M-mode ultrasonography respectively, is acceptable when used in large studies.

Cited by 67 publications

References 31 publications

Carotid intima-media thickness and hemodynamic parameters: reproducibility of manual measurements with Doppler ultrasound

Carotid intima-media thickness and hemodynamic parameters: reproducibility of manual measurements with Doppler ultrasound

Renal resistive index and cardiovascular organ damage in a large population of hypertensive patients

Prediction of Cardiovascular Morbidity and Mortality

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