Appraisal of different ultrasonography indices in patients with carotid artery atherosclerosis

Rafati, Mehravar; Havaee, Elham; Moladoust, Hassan; Sehhati, Mohammadreza

doi:10.17179/excli2017-232

Cited by 6 publications

(4 citation statements)

References 36 publications

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“…The diagnostic performances of the classical hemodynamic indices (PSV, EDV, and RI) in this study are poor compared with those reported in previous studies [ 8 , 9 , 10 ] in which severe stenosis is usually considered, and the distance between the stenosis and probe location is close despite some of the indices, such as the PSV, showing differences between the two groups to some extent. The probable cause of this phenomenon is that the classical indices may not be sensitive to mild-to-moderate stenosis from a relatively long distance, which was considered in this study.…”

Section: Discussioncontrasting

confidence: 95%

“…Because arterial stenosis may have complicated effects on blood flow velocities from a distance, correlations between invisible stenosis and hemodynamic indices measured using Doppler ultrasound, such as the peak systolic velocity (PSV), end-diastolic velocity (EDV), and resistive index (RI), have been widely investigated [ 7 , 8 , 9 , 10 , 11 ]. In addition, the Doppler spectrum waveform pattern may contain information on stenosis in other arterial locations [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

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Early Diagnosis of Intracranial Internal Carotid Artery Stenosis Using Extracranial Hemodynamic Indices from Carotid Doppler Ultrasound

Zhang

et al. 2022

Bioengineering

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Atherosclerotic intracranial internal carotid artery stenosis (IICAS) is a leading cause of strokes. Due to the limitations of major cerebral imaging techniques, the early diagnosis of IICAS remains challenging. Clinical studies have revealed that arterial stenosis may have complicated effects on the blood flow’s velocity from a distance. Therefore, based on a patient-specific one-dimensional hemodynamic model, we quantitatively investigated the effects of IICAS on extracranial internal carotid artery (ICA) flow velocity waveforms to identify sensitive hemodynamic indices for IICAS diagnoses. Classical hemodynamic indices, including the peak systolic velocity (PSV), end-diastolic velocity (EDV), and resistive index (RI), were calculated on the basis of simulations with and without IICAS. In addition, the first harmonic ratio (FHR), which is defined as the ratio between the first harmonic amplitude and the sum of the amplitudes of the 1st–20th order harmonics, was proposed to evaluate flow waveform patterns. To investigate the diagnostic performance of the indices, we included 52 patients with mild-to-moderate IICAS (<70%) in a case–control study and considered 24 patients without stenosis as controls. The simulation analyses revealed that the existence of IICAS dramatically increased the FHR and decreased the PSV and EDV in the same patient. Statistical analyses showed that the average PSV, EDV, and RI were lower in the stenosis group than in the control group; however, there were no significant differences (p > 0.05) between the two groups, except for the PSV of the right ICA (p = 0.011). The FHR was significantly higher in the stenosis group than in the control group (p < 0.001), with superior diagnostic performance. Taken together, the FHR is a promising index for the early diagnosis of IICAS using carotid Doppler ultrasound methods.

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Section: Discussioncontrasting

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Early Diagnosis of Intracranial Internal Carotid Artery Stenosis Using Extracranial Hemodynamic Indices from Carotid Doppler Ultrasound

Zhang

et al. 2022

Bioengineering

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“…[ 11 , 12 ] It measures peak systolic velocity (PSV), end diastolic velocity (EDV), mean flow velocity (MFV), and peak diastolic velocity which measure the resistive index (RI) and pulsatility index (PI), the most practical parameters for assessing hemodynamic status of the common carotid artery, internal carotid artery (ICA), extracranial carotid artery, vertebral artery, and ophthalmic artery. [ 13 ] PI assesses vascular resistance and is considered a marker of small vessel disease and microangiopathic changes in the brain, [ 14 , 15 ] whereas RI relates to the vessel wall elasticity. [ 16 ] The normal values for PI and RI are typically <1.2 and <0.7, respectively.…”

Section: Introductionmentioning

confidence: 99%

Sequential carotid Doppler study in acute stroke and its clinical correlation: A prospective study

Karn,

Narayan,

Qavi

et al. 2023

JNRP

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Objectives: Resistive index (RI) and pulsatility index (PI) assessed on carotid Doppler assess the hemodynamic status of cranial vasculature. They are related to the severity of stroke and help determine the overall outcome. This study was done to compare the hospital stay and stroke severity with RI and PI of both internal carotid arteries. Materials and Methods: Patients >18 years of age presenting within 48 h of anterior circulation stroke (either ischemic or hemorrhagic) were included. They were divided into two groups based on their length of stay (LOS). They were assessed clinically on days 1, 3, and 5, and underwent a carotid Doppler study on the same days. The Doppler parameters were correlated with the LOS and stroke severity for possible associations. Results: One hundred and one patients were included. Forty-seven patients had a favorable outcome based on LOS. In this group, significant decrease in RI and PI scores was seen from days 1 to 3. In patients with unfavorable outcome, there was a significant increase in PI on days 1–3 and days 1–5. The National Institutes of Health Stroke Scale decreased significantly from days 1 to 5 in favorable group Conclusion: For those with an unfavorable outcome and prolonged LOS, PI continues to increase suggesting a failure of autoregulation. Carotid Doppler can be a simple bedside tool to predict outcome in patients with acute stroke.

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“…This shows that cut-off values may be established for variations in Doppler parameters with atherosclerosis/age based on a 46-year-old borderline for the renal aortic ratio and renal interlobar ratio. Another related study also found a direct influence of Doppler parameters on the development of atherosclerosis [12]. The cross-sectional study appraised different ultrasonography indices in patients with carotid artery atherosclerosis during which the resistive index (RI), pulsatility index (PI), Intima-Media Thickness (IMT), Dichrotic Notch Index (DNI) and Mean Wavelength Entropy (MWE) were investigated in 144 Iranian men.…”

Section: Introductionmentioning

confidence: 99%

Reference values of abdominal aorta wall thickness and Doppler indices in a Nigerian population

Okpaleke,

Ugwuanyi,

Ogolodom

et al. 2023

ajhs

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Introduction : There is a paucity of data on the association between Doppler indices, the wall thickness of the abdominal aorta and the development of atherosclerosis in Nigeria. This study aimed to establish reference data of the abdominal aorta wall thickness and their selected Doppler indices in Abuja, Nigeria. Methodology : This cross-sectional prospective study enlisted volunteer healthy subjects who consented and met the inclusion criteria by convenience sampling. The abdominal Aorta wall thickness (AAWT), as well as selected Doppler indices which are: the resistivity and pulsatility indices (RI & PI) of the abdominal aorta (AA) of four hundred and twelve male and female volunteer healthy subjects, were measured sonographically using standard protocols. Data was analyzed using SPSS v 23 and inferential analysis was done with a level of significance set at 5 %. Results : The mean ± SD of the AAWT in the volunteer healthy subjects were 1.54 ± 0.33mm and 1.29 ± 0.32mm in male and female healthy volunteers respectively. The mean ± SD of the RI and PI for male volunteer healthy subjects were 0.81 ± 0.06, and 1.09 ± 0.20. Also, the mean + SD of the RI and PI for female healthy volunteers was 0.59 ± 0.06, and 1.10 ± 0.21 respectively. Conclusion : The reference AAWT, RI and PI in the locality were 1.51 ± 0.33mm, 0.6 ± 0.06 and 1.02 ± 0.19. The RI, PI and AAWT values were higher in males (p >0.005) than in female volunteer healthy subjects.

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Appraisal of different ultrasonography indices in patients with carotid artery atherosclerosis

Cited by 6 publications

References 36 publications

Early Diagnosis of Intracranial Internal Carotid Artery Stenosis Using Extracranial Hemodynamic Indices from Carotid Doppler Ultrasound

Early Diagnosis of Intracranial Internal Carotid Artery Stenosis Using Extracranial Hemodynamic Indices from Carotid Doppler Ultrasound

Sequential carotid Doppler study in acute stroke and its clinical correlation: A prospective study

Reference values of abdominal aorta wall thickness and Doppler indices in a Nigerian population

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