oru.sePublikationer
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Echocardiographic measurements of the heart: with focus on the right ventricle
Örebro University, School of Health and Medical Sciences.
2011 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Echocardiography is a well established technique when evaluating the size and function of the heart. One of the most common ways to measure the size of the right ventricle (RV) is to measure the RV outflow tract 1(RVOT1). Several ways to measure RVOT1 are described in the literature.These ways were compared with echocardiography on 27 healthy subjects.The result showed significant differences in RVOT1, depending on the way it was measured, concluding that the same site, method and body positionshould be used when comparing RVOT1 in the same subject over time.One parameter to evaluate the RV diastolic function (RVDF) is to measure the RV isovolumetric relaxation time (RV-IVRT), a sensitive marker ofRV dysfunction. There are different ways to measure this. In this thesis two ways of measuring RV-IVRT and their time intervals were compared in 20 patients examined with echocardiography. There was a significant difference between the two methods indicating that they are not measuring the same interval.Another way to assess the RVDF is to measure the maximal early diastolicvelocity (MDV) in the long-axis direction. MDV can be measured bydifferent methods, hence 29 patients were examined and MDV was measured according to two methods. There was a good correlation but a poor agreement between the two methods meaning that reference values cannot be used interchangeably.Takotsubo cardiomyopathy is characterized by apical wall motion abnormalities without coronary stenosis. The pathology of this condition remains unclear. To evaluate biventricular changes in systolic long-axisfunction and diastolic parameters in the acute phase and after recovery, 13 patients were included and examined with echocardiography at admission and after recovery. The results showed significant biventricular improvementof systolic long-axis function while most diastolic parameters remainedunchanged.

Place, publisher, year, edition, pages
Örebro: Örebro university , 2011. , 63 p.
Series
Örebro Studies in Medicine, ISSN 1652-4063 ; 52
Keyword [en]
Echocardiography, heart, right ventricle, right ventricular outflow tract 1, isovolumetric relaxation time, maximal early diastolic relaxation velocity, takotsubo cardiomyopathy, long-axis function
National Category
Medical and Health Sciences Physiology
Research subject
Biomedicine
Identifiers
URN: urn:nbn:se:oru:diva-14528ISBN: 978-91-7668-783-3 (print)OAI: oai:DiVA.org:oru-14528DiVA: diva2:396284
Public defence
2011-03-11, Wilandersalen, Örebro universitetssjukhus, Örebro, 13:00 (Swedish)
Opponent
Supervisors
Available from: 2011-02-09 Created: 2011-02-09 Last updated: 2011-04-21Bibliographically approved
List of papers
1. Echocardiographic measurements of the right ventricle: right ventricular outflow tract 1
Open this publication in new window or tab >>Echocardiographic measurements of the right ventricle: right ventricular outflow tract 1
2010 (English)In: Clinical research in cardiology, ISSN 1861-0684, Vol. 99, no 7, 429-435 p.Article in journal (Refereed) Published
Abstract [en]

The size of the ventricles of the heart is important to establish during the clinical echocardiographic examination. Due to the complex anatomy of the right ventricle, it is difficult to measure its size at times. One of the most frequently used ways is to measure the right ventricular outflow tract (RVOT1), probably due to its good reproducibility. However, in the literature different ways are described to measure RVOT1, both at different sites and using different methods such as M-mode and 2D. The first aim of the present study was to exam if there is a significant difference in the outcome of RVOT1 using different sites and methods to measure it. The second aim was to study if there is a significant difference between the usually preferred left lateral decubitus position during the echocardiographic examination and the supine decubitus position, which the echocardiographer sometimes can be compelled to use if the patient is unable to lie in the left lateral decubitus position

Place, publisher, year, edition, pages
Berlin: Springer, 2010
Keyword
Heart, Right ventricular size, Echocardiography, Body position
National Category
Cardiac and Cardiovascular Systems
Research subject
Cardiology
Identifiers
urn:nbn:se:oru:diva-14627 (URN)10.1007/s00392-010-0137-7 (DOI)000279585300003 ()20213263 (PubMedID)2-s2.0-77955230034 (Scopus ID)
Conference
Heart, Right ventricular size, Echocardiography,Body position
Available from: 2011-02-15 Created: 2011-02-15 Last updated: 2016-12-16Bibliographically approved
2. Isovolumetric relaxation time of the right ventricle assessed by tissue Doppler imaging
Open this publication in new window or tab >>Isovolumetric relaxation time of the right ventricle assessed by tissue Doppler imaging
2004 (English)In: Scandinavian Cardiovascular Journal, ISSN 1401-7431, Vol. 38, no 5, 278-282 p.Article in journal (Refereed) Published
Abstract [en]

Objectives-The isovolumetric relaxation time of the right ventricle (RV-IVRT) can be assessed using a method based on ECG and pulsed wave Doppler (PW). Recently pulsed wave Doppler tissue imaging (PW-DTI) has been introduced in the assessment.

Design-RV-IVRT obtained by the two methods was compared in 20 consecutive patients as was the time from the R wave on the ECG to the onset of tricuspid flow (R-T), to the closure of the pulmonic valve (R-P), to the onset of early diastolic motion of the tricuspid annulus tissue (R-E) and to the end of the systolic motion (R-S).

Results-RV-IVRT obtained by the PW method was significantly (p<0.001) shorter than RV-IVRT obtained by PW-DTI. R-S had significantly (p<0.001) shorter duration than R-P, while there was no significant difference between R-E and R-T.

Conclusions-The methods are not measuring the same interval. Only the PW method measures RV-IVRT according to the usual definition. Different reference values have to be used if the methods are used in the assessment of RV diastolic function.

Place, publisher, year, edition, pages
Oslo: Taylor& Francis, 2004
Keyword
Echocardiography
National Category
Cardiac and Cardiovascular Systems
Research subject
Internal Medicine; Cardiology
Identifiers
urn:nbn:se:oru:diva-14629 (URN)10.1080/14017430410022849 (DOI)
Available from: 2011-02-15 Created: 2011-02-15 Last updated: 2014-12-05Bibliographically approved
3. Comparison between maximal early diastolic velocity in long-axis direction obtained by M-mode echocardiography and by tissue Doppler in the assessment of right ventricular diastolic function
Open this publication in new window or tab >>Comparison between maximal early diastolic velocity in long-axis direction obtained by M-mode echocardiography and by tissue Doppler in the assessment of right ventricular diastolic function
2005 (English)In: Clinical Physiology and Functional Imaging, ISSN 1475-0961, E-ISSN 1475-097X, Vol. 25, no 3, 178-182 p.Article in journal (Refereed) Published
Abstract [en]

Recently the maximal early diastolic velocity in long-axis direction of the right ventricle (RV) obtained by tissue Doppler imaging (MDV TDI) has been introduced in the assessment of RV diastolic function (RVDF). There are reasons to think that also the maximal early diastolic velocity in long-axis direction of the RV obtained using M-mode echocardiography (MDV TAM) could be used to assess RVDF. Therefore, 29 patients were examined with echocardiography and MDV TAM and MDV TDI were measured and compared. A good correlation (r = 0.76, P&LT; 0.001) was found between MDV TAM and MDV TDI indicating that MDV TAM might be used in the assessment of RVDF. However, the velocities obtained by MDV TDI (126.7 &PLUSMN; 38.9 mm s(-1)) were significantly (P&LT; 0.001) higher than the velocities obtained by MDV TAM (78.3 &PLUSMN; 27.8 mm s(-1)) and the agreement between MDV TAM and MDV TDI was rather poor probably mainly due to differences in the measuring technique. This means that reference values cannot be used interchangeably between MDV TAM and MDV TDI. If MDV TAM is going to be used in the assessment of RVDF new reference values have to be produced if today's technique and recommendations to measure MDV TAM and MDV TDI are used. However, as most new echocardiographs are equipped with PW-TDI technology it seems preferable to use this technique and compare obtained values with already established reference values.

Place, publisher, year, edition, pages
Oxford: Blackwell, 2005
Keyword
heart, tissue Doppler imaging, tricuspid annulus
National Category
Cardiac and Cardiovascular Systems
Research subject
Internal Medicine; Cardiology
Identifiers
urn:nbn:se:oru:diva-14630 (URN)10.1111/j.1475-097X.2005.00610.x (DOI)000229033400009 ()15888099 (PubMedID)2-s2.0-20344375249 (Scopus ID)
Available from: 2011-02-15 Created: 2011-02-15 Last updated: 2014-12-05Bibliographically approved
4. Left and right ventricular systolic long-axis function and diastolic function in patients with takotsubo cardiomyopathy
Open this publication in new window or tab >>Left and right ventricular systolic long-axis function and diastolic function in patients with takotsubo cardiomyopathy
Show others...
2011 (English)In: Clinical Physiology and Functional Imaging, ISSN 1475-0961, E-ISSN 1475-097X, Vol. 31, no 3, 203-208 p.Article in journal (Refereed) Published
Abstract [en]

Aims: Takotsubo cardiomyopathy is characterized by apical wall motion abnormalities without coronary stenosis. Limited information is available on the genesis of the underlying reversible contractile disorder. Our objective in this prospective study was to investigate biventricular changes in systolic long-axis function and diastolic parameters in the acute phase and after recovery.

Methods and results: Thirteen consecutive patients were examined by echocardiography and coronary angiography at admission and again by echocardiography after 3 months. Amplitudes, systolic and diastolic velocities of the mitral and tricuspid annuli and conventional diastolic parameters were measured. Systolic long-axis shortening of the left ventricle (LV) and right ventricle (RV) improved from 9·6 ± 2·2 mm to 11·2 ± 1·9 mm (P = 0·02) and from 21·3 ± 3·6 mm to 24·1 ± 2·8 mm (P = 0·02), respectively. LV systolic, early and late diastolic velocities measured by pulsed-wave tissue Doppler also improved, while additional conventional diastolic parameters of the LV and RV diastolic function were unchanged.Conclusions: Takotsubo cardiomyopathy temporarily affects systolic LV and RV function, while most diastolic parameters remain unchanged

Place, publisher, year, edition, pages
Oxford: Wiley, 2011
Keyword
annulus motion, atrioventricular displacement, doppler, echocardiography, heart
National Category
Cardiac and Cardiovascular Systems
Research subject
Internal Medicine; Cardiology
Identifiers
urn:nbn:se:oru:diva-14631 (URN)10.1111/j.1475-097X.2010.01001.x (DOI)000289258100007 ()21138516 (PubMedID)2-s2.0-79953745331 (Scopus ID)
Available from: 2011-02-15 Created: 2011-02-15 Last updated: 2017-03-27Bibliographically approved

Open Access in DiVA

fulltext(3556 kB)2281 downloads
File information
File name FULLTEXT01.pdfFile size 3556 kBChecksum SHA-512
b6e6deb2deca31ed8f84fac0b366d4d1759f5071ddc627b6f79ad3b0a3073228fb06d9a7911bbcbcc52e04da9f9022dc327ae3e4c4f721c761fcca3d07a427b0
Type fulltextMimetype application/pdf
cover(1583 kB)65 downloads
File information
File name COVER01.pdfFile size 1583 kBChecksum SHA-512
756519d06eba31d862ea0e3fad8e110d8b2f10708c2e1e959966a6e9f39c9b3cc961b5b29e73a32b0c38e7ef3e1506fa8928ab9ef4f9d299718e6366fe12ba19
Type coverMimetype application/pdf
spikblad(116 kB)13 downloads
File information
File name SPIKBLAD01.pdfFile size 116 kBChecksum SHA-512
1420e1b3bf00d2cbe92a05c4f46864cfbec02d2b6752871298ebb375021722c0f847574f506e0b6f5c6e809c57b77d6ae3bc56bb57ff2be7da6b947738638347
Type spikbladMimetype application/pdf

Search in DiVA

By author/editor
Loiske, Karin
By organisation
School of Health and Medical Sciences
Medical and Health SciencesPhysiology

Search outside of DiVA

GoogleGoogle Scholar
Total: 2281 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 663 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf