Acceleration time ratio for the assessment of extracranial internal carotid artery stenosis

Takekawa, Hidehiro; Suzuki, Keisuke; Takada, Etsuo; Tanaka, Hideaki; Okabe, Ryuta; Yamamoto, M.; Ishii, Yuko; Okamura, Madoka; Hirata, Koichi

doi:10.1007/s10396-013-0471-2

Cited by 11 publications

(7 citation statements)

References 10 publications

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“…Although these past reports suggested that AcT and the AcT ratio were useful in the diagnosis of stenosis of ICA origin, there was still a variance with the ICA-AcT cutoff values of 85-150 ms [4,6,8], and AcT ratios of 1.31-1.75 [4,5,8], even in stenosis rates considered to be DSA-NAS-CET ≥ 50%.…”

Section: Discussionmentioning

confidence: 89%

“…There are few reports on the diagnosis of ICA origin stenosis, where the AcT or the AcT ratio was used [4][5][6][7][8]. Takekawa et al [4] reported on 127 blood vessels, where the PSV and the ICA-AcT exhibited a significant positive correlation.…”

Section: Discussionmentioning

confidence: 99%

“…In addition, the AcT ratio was also useful for ICA origin stenosis. Takekawa et al [5] evaluated the "conventional AcT ratio". They studied its relationship with the diameter stenosis rate evaluated by carotid artery ultrasonography, and reported that there was a significant positive correlation between both; this suggested that the diameter stenosis rate is ≥ 50% when the conventional AcT ratio exceeds 1.5.…”

Section: Discussionmentioning

confidence: 99%

“…We measured "conventional AcT" of the CCA ("conventional CCA-AcT") and ICA ("conventional ICA-AcT") according to Takekawa's method [5]. Briefly, for a bimodal pattern, the time from initiation of upstroke to the first maximum peak of the waveform was defined as "conventional AcT", and for a monomodal peak pattern with a distinct bending point, the time to the bending point was defined as "conventional AcT" (Fig.…”

Section: )mentioning

confidence: 99%

“…In addition, the acceleration time (AcT) of the ICA, which can be measured by pulsed-wave Doppler, has been reported useful in cases, where measurement of the PSV of stenosis is difficult [4][5][6][7][8]. The AcT is prolonged in the presence of aortic valve stenosis (AS) [9].…”

Section: Introductionmentioning

confidence: 99%

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Suitable methods of measuring acceleration time in the diagnosis of internal carotid artery stenosis

et al. 2020

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Purpose To enhance the utility of acceleration time (AcT) in the diagnosis of internal carotid artery (ICA) stenosis, we assessed the value of AcT measurements with different waveform patterns. Methods Ninety-three patients with acute atherothrombotic cerebral infarction were enrolled, and they underwent both carotid ultrasonography and digital subtraction angiography (DSA). AcT was determined by a conventional procedure (using the first peak point or the bending point) and the peak systolic velocity (PSV) procedure. The AcT ratio was calculated as (AcT of ICA)/(AcT of the ipsilateral common carotid artery). We evaluated the correlation of stenosis rate as assessed by the North American Symptomatic Carotid Endarterectomy Trial method using DSA (DSA-NASCET) with the AcT of ICA (ICA-AcT), the AcT ratio measured by the conventional procedure (conventional AcT ratio), and the AcT ratio measured by the PSV procedure (PSV AcT ratio). The area under receiver operating characteristic curves (AUC) for DSA-NASCET was calculated based on the ICA-AcT and AcT ratio. Results Forty-five vessels had 50% or greater ICA stenosis. DSA-NASCET was positively correlated with the conventional AcT ratio (r = 0.723), conventional ICA-AcT (r = 0.638), and PSV AcT ratio (r = 0.245). The corresponding AUCs for ICA stenosis ≥ 50% were 0.971, 0.886, and 0.572, respectively. Conclusion We demonstrated the usefulness of the conventional procedure for diagnosing stenosis of ICA origin using AcT and showed that the AcT ratio was a more beneficial parameter than AcT.

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Section: Discussionmentioning

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: )mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Suitable methods of measuring acceleration time in the diagnosis of internal carotid artery stenosis

et al. 2020

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Vertebral artery Doppler waveform patterns for exclusive diagnosis of basilar artery stenosis and occlusion

Okamura

Takekawa²,

Sjsum

et al. 2015

J Med Ultrasonics

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Usefulness of acceleration time ratio in diagnosis of internal carotid artery origin stenosis

et al. 2018

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PurposeThe acceleration time (AcT) ratio of the internal carotid artery (ICA) is increased in ICA stenosis. However, there are few reports that have directly compared the AcT ratio to digital subtraction angiography (DSA) findings.MethodsWe evaluated 177 vessels with DSA and carotid artery ultrasonography. The AcT ratio was calculated as AcT of the ICA (ICA–AcT)/AcT of the ipsilateral common carotid artery (CCA). We evaluated the correlation of DSA–NASCET stenosis with the origin of the ICA or the peak systolic velocity (ICApsv) in the stenotic region, ICApsv/peak systolic velocity of the CCA (CCApsv), ICA–AcT, and AcT ratio. Sensitivity and specificity for stenosis ≥ 70% were calculated based on the ICApsv, ICApsv/CCApsv, ICA–AcT, and AcT ratio.ResultsUsing NASCET criteria, 34 vessels had 70% or greater stenosis. DSA–NASCET showed a significant positive correlation with ICApsv, ICApsv/CCApsv, ICA–AcT, and AcT ratio (p < 0.0001). When the cut-off value for ICApsv was set at 176 cm/s, ICApsv/CCApsv at 2.42, ICA–AcT at 0.095 s, and the AcT ratio at 1.35, the sensitivity was 97.1, 97.1, 82.4, and 97.1%, and the specificity was 94.4, 91.0, 83.2, and 83.2%, for DSA–NASCET ≥ 70%, respectively.ConclusionThe AcT ratio is a beneficial parameter for evaluating ICA stenosis as well as ICApsv and ICApsv/CCApsv.

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Acceleration time ratio for the assessment of extracranial internal carotid artery stenosis

Abstract: Our results indicate that applying the AcT ratio can help in the diagnosis of ICA stenosis.

Cited by 11 publications

References 10 publications

Suitable methods of measuring acceleration time in the diagnosis of internal carotid artery stenosis

Suitable methods of measuring acceleration time in the diagnosis of internal carotid artery stenosis

Vertebral artery Doppler waveform patterns for exclusive diagnosis of basilar artery stenosis and occlusion

Usefulness of acceleration time ratio in diagnosis of internal carotid artery origin stenosis

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