Evidence map›Paper›PMID 33829405›Full record

ArticleCardiovascular engineering and technology2021

Analysis of Turbulence Effects in a Patient-Specific Aorta with Aortic Valve Stenosis.

Emily L Manchester, Selene Pirola, Mohammad Yousuf Salmasi, Declan P O'Regan, Thanos Athanasiou, Xiao Yun Xu

Open access · hybridAbstract read
In one paragraph

Article in Cardiovascular engineering and technology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed
6.4field-weighted citation impact, top 2% 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

26 citing papers in PubMed, 56 citations in OpenAlex.

  1. Article
  2. Hemodynamic Metrics and Arterial Dysfunction: Insights From a Novel Microfluidic Device.International journal for numerical methods in biomedical engineering · 2026
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  14. Differences in blood flow dynamics between balloon- and self-expandable valves in patients with aortic stenosis undergoing transcatheter aortic valve replacement.Journal of cardiovascular magnetic resonance : official journal of the Society for Cardiovascular Magnetic Resonance · 2023
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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 3 institutions in 1 country.

Emily L ManchesterDepartment of Chemical Engineering, Imperial College London, South Kensington Campus, London, SW7 2AZ, UK.
Selene PirolaDepartment of Chemical Engineering, Imperial College London, South Kensington Campus, London, SW7 2AZ, UK.
Mohammad Yousuf SalmasiDepartment of Surgery and Cancer, St Mary's Hospital, Imperial College London, London, W2 1NY, UK.
Declan P O'ReganHammersmith Hospital, MRC London Institute of Medical Sciences Imperial College London, London, W12 0HS, UK.
Thanos AthanasiouDepartment of Surgery and Cancer, St Mary's Hospital, Imperial College London, London, W2 1NY, UK.
Xiao Yun XuDepartment of Chemical Engineering, Imperial College London, South Kensington Campus, London, SW7 2AZ, UK. yun.xu@imperial.ac.uk.ORCID http://orcid.org/0000-0002-8267-621X
Imperial College London · GBSt Mary's Hospital · GBHammersmith Hospital · GB

Funding

British Heart Foundation NH/17/1/32725Engineering and Physical Sciences Research Council EP/R512540/1Medical Research Council MC_UP_1605/13UK Medical Research Council MC-A651-53301
6 · The paper itself

Abstract

Blood flow in the aorta is often assumed laminar, however aortic valve pathologies may induce transition to turbulence and our understanding of turbulence effects is incomplete. The aim of the study was to provide a detailed analysis of turbulence effects in aortic valve stenosis (AVS).

methodsLarge-eddy simulation (LES) of flow through a patient-specific aorta with AVS was conducted. Magnetic resonance imaging (MRI) was performed and used for geometric reconstruction and patient-specific boundary conditions. Computed velocity field was compared with 4D flow MRI to check qualitative and quantitative consistency. The effect of turbulence was evaluated in terms of fluctuating kinetic energy, turbulence-related wall shear stress (WSS) and energy loss.

resultsOur analysis suggested that turbulence was induced by a combination of a high velocity jet impinging on the arterial wall and a dilated ascending aorta which provided sufficient space for turbulence to develop. Turbulent WSS contributed to 40% of the total WSS in the ascending aorta and 38% in the entire aorta. Viscous and turbulent irreversible energy losses accounted for 3.9 and 2.7% of the total stroke work, respectively.

conclusionsThis study demonstrates the importance of turbulence in assessing aortic haemodynamics in a patient with AVS. Neglecting the turbulent contribution to WSS could potentially result in a significant underestimation of the total WSS. Further work is warranted to extend the analysis to more AVS cases and patients with other aortic valve diseases.

Indexed as

Aortic Valve StenosisAortaAortic ValveBlood Flow VelocityHemodynamicsHumansMagnetic Resonance ImagingStress, MechanicalAortic valve stenosisComputational fluid dynamicsEnergy lossKinetic energyLarge-eddy simulationTurbulenceWall shear stress

Identifiers

PMID33829405
PMCPMC8354935
OpenAlexW3147592611

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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.