Evidence map›Paper›PMID 30368567›Full record

ArticleClinical research in cardiology : official journal of the German Cardiac Society2019

Test-retest reliability of new and conventional echocardiographic parameters of left ventricular systolic function.

Tomasz Baron, Lars Berglund, Eva-Maria Hedin, Frank A Flachskampf

Open access · hybridAbstract read
In one paragraph

Article in Clinical research in cardiology : official journal of the German Cardiac Society, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed
2.0field-weighted citation impact, top 12% 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

27 citing papers in PubMed, 50 citations in OpenAlex.

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  18. Reliability of estimating left ventricular ejection fraction in clinical routine: a validation study of the SWEDEHEART registry.Clinical research in cardiology : official journal of the German Cardiac Society · 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

4 authors at 1 institution in 1 country.

Tomasz BaronDepartment of Medical Sciences, Cardiology and Clinical Physiology, Uppsala University, Uppsala, Sweden. tomasz.baron@ucr.uu.se.ORCID http://orcid.org/0000-0002-8290-557X
Lars BerglundUppsala Clinical Research Center, Uppsala University, Uppsala, Sweden.
Eva-Maria HedinDepartment of Medical Sciences, Cardiology and Clinical Physiology, Uppsala University, Uppsala, Sweden.
Frank A FlachskampfDepartment of Medical Sciences, Cardiology and Clinical Physiology, Uppsala University, Uppsala, Sweden.
Uppsala University · SE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundReliability of left ventricular function measurements depends on actual biological conditions, repeated registrations and their analyses.

objectiveTo investigate test-retest reliability of speckle-tracking-derived strain measurements and its determinants compared to the conventional parameters, such as ejection fraction (EF), LV volumes and mitral annular plane systolic excursion (MAPSE).

methodsIn 30 patients with a wide range of left ventricular function (mean EF 46.4 ± 16.4%, range 14-73%), standard echo views were acquired independently in a blinded fashion by two different echocardiographers in immediate sequence and analyzed off-line by two independent readers, creating 4 data sets per patient. Test-retest reliability of studied parameters was calculated using the smallest detectable change (SDC) and a total, inter-acquisition and inter-reader intra-class correlation coefficient (ICC).

resultsThe smallest detectable change normalized to the mean absolute value of the measured parameter (SDCrel) was lowest for MAPSE (10.7%). SDCrel for EF was similar to GLS (14.2 and 14.7%, respectively), while SDCrel for CS was much higher (35.6%). The intra-class correlation coefficient was excellent (> 0.9) for all measures of the left ventricular function. Intra-patient inter-acquisition reliability (ICCacq) was significantly better than inter-reader reliability (ICCread) (0.984 vs. 0.950, p = 0.03) only for EF, while no significant difference was observed for any other LV function parameter. Mean intra-subject standard deviations were significantly correlated to the mean values for CS and LV volumes, but not for the other studied parameters.

conclusionsIn a test-retest setting, both with normal and impaired left ventricular function, the smallest relative detectable change of EF, GLS and MAPSE was similar (11-15%), but was much higher for CS (35%). Surprisingly, reliability of GLS was not superior to that of EF. Acquisition and reader to a similar extent influenced the reliability of measurements of all left ventricular function measures except for ejection fraction, where the reliability was more dependent on the reader than on the acquisition.

Indexed as

EchocardiographyFemaleHeart VentriclesHumansMaleMiddle AgedProspective StudiesReproducibility of ResultsROC CurveStroke VolumeSystoleVentricular Dysfunction, LeftVentricular Function, LeftEjection fractionGlobal longitudinal strainLeft ventricular functionMitral annulus plane systolic excursionTest–retest reliability

Identifiers

PMID30368567
PMCPMC6426804
OpenAlexW2898303354

What OpenQuestion holds

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LicenceCC BY
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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.