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Ekokardiografi: jämförelse av erfarenhetens betydelse vid mätningar av strain och strain rate i vänster kammare
Jönköping University, School of Health and Welfare, HHJ, Dep. of Natural Science and Biomedicine.
Jönköping University, School of Health and Welfare, HHJ, Dep. of Natural Science and Biomedicine.
2019 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
Echocardiography: a comparison of the significance of experience when measuring strain and strain rate in the left ventricle (English)
Abstract [sv]

Bakgrund: Ekokardiografi har en betydande roll i diagnostisering av vänster kammare. Genom undersökning av segmentell och global longitudinell strain samt strain rate kan regional och global kinetik bedömas. Vid kontraktion och relaxation deformeras myokardiet varvid segmentell strain mäter deformationen av respektive segment uttryckt i procent medan strain rate mäter hastigheten av deformationen. Genom summering av medelvärdet från alla segment erhålls global longitudinell strain.

Syfte: Syftet med studien var att jämföra ultraljudbaserade segmentell och global strain samt strain rate i vänster kammare. Jämförelse har gjorts mellan mätningar utförd av erfaren biomedicinsk analytiker samt mindre erfarna biomedicinska analytikerstudenter.

Metod: Kvantitativ studie där 10 testpersoner undersökts ekokardiografiskt. Bildtagningen och mätresultaten insamlades med Siemens Acuson SC2000. Sammanställning av insamlade mätvärden gjordes på Microsoft Excel och Microsoft Word i diagram och tabeller. För jämförelse av strain segmentellt och globalt samt strain rate har analysmetoden Related-Samples Wilcoxon Signed Rank Test använts.

Resultat: Resultatet visade enbart en statistisk signifikant skillnad (p <0,05) vid segmentell strain i basala segmenten i apikala projektioner mellan erfaren biomedicinsk analytiker och student 1.

Konklusion: Datamaterialet är inte tillräckligt för att kunna generalisera resultatet till en större population. Det behövs fortsatta studier inom området för att dra en mer säkerställd slutsats.

Abstract [en]

Background: Echocardiography has a major role for assessment of the left ventricle. By using segmental and global longitudinal strain and strain rate both regional and global kinetics can be assessed. Segmental strain measures deformation of the myocardium as strain rate measures the velocity of the deformation. By summing the average from all segments, global longitudinal strain is obtained.

Purpose:  To compare heart ultrasound-based segmental and global strain and strain rate in the left ventricle. Comparisons have been made between experienced biomedical laboratory scientist and less experienced biomedical laboratory scientist’s students.

Method: Quantitative study were 10 test subjects have been examined echocardiographically. Imaging and measurements were collected with Siemens Acuson SC2000. Compilation of collected measurements were made on Microsoft Excel and Microsoft Word in charts and tables. For comparison of segmental and global strain and strain rate the analysis method Related-Samples Wilcoxon Signed Rank Test were used.

Result: The result shows only one statistically significant difference (p <0.05) of segmental strain in the basal segments of apical projections between experienced biomedical laboratory scientist and student 1. 

Conclusion: The data material is not enough to generalize the result to a larger population. Further studies are needed to draw a more secure conclusion.

Place, publisher, year, edition, pages
2019. , p. 36
Keywords [en]
Global Longitudinal Strain (GLS); Myocardium; Speckle tracking; Transthoracic Echocardiography (TTE)
Keywords [sv]
Global Longitudinell Strain (GLS); Hjärtmuskel; Speckle tracking; Transthorakal ekokardiografi (TTE)
National Category
Biomedical Laboratory Science/Technology Cardiac and Cardiovascular Systems
Identifiers
URN: urn:nbn:se:hj:diva-44342ISRN: JU-HHJ-BLA-1-20190076OAI: oai:DiVA.org:hj-44342DiVA, id: diva2:1322760
Subject / course
HHJ, Biomedical Laboratory Science
Presentation
2019-06-05, School of Health and Welfare at Jönköping University, Barnarpsgatan 39, 553 33 Jönköping, Jönköping, 13:00 (Swedish)
Supervisors
Examiners
Available from: 2019-06-11 Created: 2019-06-11 Last updated: 2019-06-11Bibliographically approved

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