| Differences in myocardial velocities during supine and upright exercise stress echocardiography in healthy adults. | |
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MedLine Citation:
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PMID: 19254329 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: Tissue Velocity Imaging (TVI) is a method for quantitative analysis of longitudinal myocardial velocities, which can be used during exercise and pharmacological stress echocardiography. It is of interest to evaluate cardiac response to different types of stress tests and the differences between upright and supine bicycle exercise tests have not been fully investigated. Therefore, the aim of this study was to compare cardiac response during supine and upright exercise stress tests. METHOD: Twenty young healthy individuals underwent supine and upright stress test. The initial workload was set to 30 W and was increased every minute by a further 30 W until physical exhaustion. Tissue Doppler data from the left ventricle were acquired at the end of every workload level using a GE Vivid7 Dimension system (>200 frames s(-1)). In the off-line processing, isovolumic contraction velocity (IVCV), peak systolic velocity (PSV), isovolumic relaxation velocity (IVRV), peak early diastolic velocity (E') and peak late diastolic velocity (A') were identified at every workload level. RESULT: No significant difference between the tests was found in PSV. On the contrary, E' was shown to be significantly higher (P<0.001) during supine exercise than during upright exercise and IVRV was significantly lower (P<0.001) during supine exercise compared to upright exercise. CONCLUSION: Upright and supine exercise stress echocardiography give a comparable increase in measured systolic velocities and significant differences in early diastolic velocities. |
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Authors:
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Anna Bjällmark; Matilda Larsson; Kambiz Shahgaldi; Britta Lind; Reidar Winter; Lars-Ake Brodin |
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Publication Detail:
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Type: Comparative Study; Journal Article Date: 2009-03-02 |
Journal Detail:
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Title: Clinical physiology and functional imaging Volume: 29 ISSN: 1475-097X ISO Abbreviation: Clin Physiol Funct Imaging Publication Date: 2009 May |
Date Detail:
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Created Date: 2009-03-26 Completed Date: 2009-05-28 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101137604 Medline TA: Clin Physiol Funct Imaging Country: England |
Other Details:
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Languages: eng Pagination: 216-23 Citation Subset: IM |
Affiliation:
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School of Technology and Health, Royal Institute of Technology (KTH) Huddinge, Stockholm, Sweden. anna.bjallmark@sth.kth.se |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Bicycling Echocardiography, Doppler, Color* Echocardiography, Stress* Exercise Test* Feasibility Studies Female Heart Atria / ultrasonography Heart Ventricles / ultrasonography Humans Male Myocardial Contraction* Physical Endurance* Posture* Supine Position* Time Factors Young Adult |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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