Evidence map›Paper›PMID 29995701›Full record

ArticleJournal of hypertension2019

Incomplete recovery of cerebral blood flow dynamics in sufficiently treated high blood pressure.

Martin Müller, Mareike Österreich, Alexander von Hessling, Roy S Smith

Registry-linked trialOpen access · hybridAbstract read
In one paragraph

Article in Journal of hypertension, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT04611672 (Linearity and Non-linearity of Cerebral Autoregulation), which is not on this map. Cited by 12 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed, 2 pooled it
1.4field-weighted citation impact, top 20% 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.

NCT04611672 unknown statusnot on this mapstarted 2020, after this paper: background citation

Linearity and Non-linearity of Cerebral Autoregulation

Typeobservational_patient_registrySponsorLuzerner KantonsspitalRan2020 to 2025Enrolled580ConditionsStroke, AcuteArmsAssessment of CA, Assesment of CA only
3 · Its place in the literature

Who cites it

12 citing papers in PubMed, 2 syntheses or guidelines pooled it, 18 citations in OpenAlex.

  1. Pooled it
  2. Assessment of cerebral autoregulation in stroke: A systematic review and meta-analysis of studies at rest.Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism · 2019
    Pooled it
  3. Observational
  4. Article
  5. Article
  6. Impaired dynamic cerebral autoregulation measured in the middle cerebral artery in patients with vertebrobasilar ischemia is associated with autonomic failure.Journal of stroke and cerebrovascular diseases : the official journal of National Stroke Association · 2024
    Article
  7. Article
  8. Article
  9. Article
  10. Effect of drug interventions on cerebral hemodynamics in ischemic stroke patients.Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism · 2022
    Review
  11. Article
  12. Article
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

4 authors at 2 institutions in 1 country.

Martin MüllerDepartment of Neurology and Neurorehabilitation.
Mareike ÖsterreichDepartment of Neurology and Neurorehabilitation.
Alexander von HesslingDepartment of Radiology, Luzerner Kantonsspital, Spitalstrasse, Luzern.
Roy S SmithAutomatic Control Laboratory, ETH Zürich, Zürich, Switzerland.
ETH Zurich · CHLuzerner Kantonsspital · CH

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveWhether cerebrovascular regulation is different in patients with controlled high blood pressure (HBP) with and without small vessel disease (SVD).

methodsSixty-seven healthy controls (mean age ± SD, 45 ± 16 years; 30 women, 37 men) and 40 patients (mean age, 64 ± 13 years; 14 women, 26 men) with HBP and different stages of SVD, underwent simultaneous recordings of the spontaneous fluctuations of BP, blood flow velocity (CBFV) in both middle cerebral arteries (MCA), and of end-tidal CO2 (ETCO2). Coherence and transfer function gain and phase between BP and CBFV were assessed in the frequency ranges of VLF (0.02-0.07 Hz), low frequency (0.07-0.15), and high frequency (>0.15). BP SD indicated BP variability (BPV).

resultsIn controls (BP, 86 ± 13 mmHg; ETCO2, 39 ± 4 mmHg; BPV, 15 ± 6 mmHg), gain, phase and coherence were not age-dependent in simple or a multiple regression models. BPV correlated significantly in both MCAs with gain in low frequency and high frequency, and with phase in VLF and high frequency. In patients (BP, 91 ± 16 mmHg, ETCO2, 39 ± 4 mmHg, BPV 18 ± 5 mmHg), only gain showed some differences between different SVD groups. Comparing all patients with 25 controls of similar age and sex, patients exhibited significantly (P < 0.05-P < 0.005): increased coherence and gain in VLF, decreased phase in VLF and low frequency, correlations between BPV with phase in low frequency (left) and with gain in VLF (left) and in high frequency (left and right).

conclusionPhase seems an age independent autoregulatory index. In controlled HBP, CBF regulation is degraded at longlasting CBF changes; BPV effects lose their physiological bilateral distribution.

Indexed as

Blood PressureCerebrovascular CirculationAdultAgedAged, 80 and overBlood Flow VelocityCase-Control StudiesFemaleHumansHypertensionMaleMiddle AgedMiddle Cerebral ArteryYoung Adult

Identifiers

PMID29995701
PMCPMC6365247
OpenAlexW2884509496

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

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.