Evidence map›Paper›PMID 26703171›Full record

ArticleJournal of medical ultrasonics (2001)2016

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

Madoka Okamura, Hidehiro Takekawa, SJSUM, Ryuta Okabe, Keisuke Suzuki, Koichi Hirata

Abstract readEvaluation Study
PubMed Publisher
In one paragraph

Article in Journal of medical ultrasonics (2001), 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
0.2field-weighted citation impact, top 40% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

2 citing papers in PubMed, 9 citations in OpenAlex.

  1. Imaging Characteristics of Persistent Carotid-Vertebrobasilar Anastomoses Detected by Ultrasound: A Case Series.Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine · 2025
    Article
  2. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 1 institution in 1 country.

Madoka OkamuraStroke Division, Department of Neurology, Dokkyo Medical University, 880 Kitakobayashi, Mibu, Shimotsuga, Tochigi, 321-0293, Japan.
Hidehiro TakekawaStroke Division, Department of Neurology, Dokkyo Medical University, 880 Kitakobayashi, Mibu, Shimotsuga, Tochigi, 321-0293, Japan. htakekawa-jscn@umin.ac.jp.
SJSUM
Ryuta OkabeStroke Division, Department of Neurology, Dokkyo Medical University, 880 Kitakobayashi, Mibu, Shimotsuga, Tochigi, 321-0293, Japan.
Keisuke SuzukiDepartment of Neurology, Dokkyo Medical University, Tochigi, Japan.
Koichi HirataDepartment of Neurology, Dokkyo Medical University, Tochigi, Japan.
Dokkyo Medical University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThe aim of this study was to evaluate the usefulness of vertebral artery (VA) pulsed Doppler waveform changes in excluding basilar artery (BA) stenosis/occlusion.

methodsOne-hundred and twenty-two patients with time-averaged peak flow velocity (MV) of bilateral VAs <18 cm/s, measured by carotid ultrasonography, were included. The pulsatility index (PI) and resistive index (RI) of both VAs were measured. The maximum PI (Max PI) and maximum RI (Max RI) were used for analysis, respectively. BA stenosis/occlusion and fetal-type posterior cerebral artery (f-PCA) were evaluated using MR angiography.

resultsThirty-six patients had BA stenosis/occlusion. Acute infratentorial cerebral infarction (CI), f-PCA, Max PI, and Max RI were significantly higher in patients with BA stenosis/occlusion. Multiple logistic regression analysis revealed that "Max PI ≥2.00 or Max RI ≥0.82" had an odds ratio of 3.75 (95% CI 1.43-9.84) for diagnosing BA stenosis/occlusion, but the positive predictive value (PPV) was low (42.2%) and negative predictive value (NPV) was high (84.5%). Similarly, "Max PI ≥2.00 and Max RI ≥0.82" had an odds ratio of 2.96 (95% CI 1.18-7.39); PPV was low (44.9%) and NPV was high (80.8%).

conclusionAmong the subjects with bilateral VA-MV <18 cm/s, PI and RI could contribute to excluding BA stenosis/occlusion.

Indexed as

AdultAgedAged, 80 and overCerebral InfarctionFemaleHumansLogistic ModelsMagnetic Resonance AngiographyMaleMiddle AgedUltrasonographyVertebral ArteryVertebrobasilar InsufficiencyBasilar artery stenosisPulsatility indexResistive indexVertebral artery

Identifiers

PMID26703171
OpenAlexW1729992273

What OpenQuestion holds

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Read underepoch 390

Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.