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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
Department of Clinical Physiology Karlskoga Hospital, Karlskoga, Sweden.
Department of Clinical Physiology Karlskoga Hospital, Karlskoga, Sweden.
Department of Clinical Physiology Karlskoga Hospital, Karlskoga, Sweden.
2005 (English)In: Clinical Physiology and Functional Imaging, ISSN 1475-0961, E-ISSN 1475-097X, Vol. 25, no 3, p. 178-182Article 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< 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 ± 38.9 mm s(-1)) were significantly (P< 0.001) higher than the velocities obtained by MDV TAM (78.3 ± 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. Vol. 25, no 3, p. 178-182
Keyword [en]
heart, tissue Doppler imaging, tricuspid annulus
National Category
Cardiac and Cardiovascular Systems
Research subject
Internal Medicine; Cardiology
Identifiers
URN: urn:nbn:se:oru:diva-14630DOI: 10.1111/j.1475-097X.2005.00610.xISI: 000229033400009PubMedID: 15888099Scopus ID: 2-s2.0-20344375249OAI: oai:DiVA.org:oru-14630DiVA, id: diva2:397715
Available from: 2011-02-15 Created: 2011-02-15 Last updated: 2017-12-11Bibliographically approved
In thesis
1. Echocardiographic measurements of the heart: with focus on the right ventricle
Open this publication in new window or tab >>Echocardiographic measurements of the heart: with focus on the right ventricle
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. p. 63
Series
Örebro Studies in Medicine, ISSN 1652-4063 ; 52
Keyword
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:nbn:se:oru:diva-14528 (URN)978-91-7668-783-3 (ISBN)
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: 2018-01-12Bibliographically approved

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Emilsson, KentLoiske, Karin

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