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Comparison between aortic valve area obtained by planimetry and by using the continuity equation: a transthoracic echocardiographic study
Örebro University, School of Health and Medical Sciences, Örebro University, Sweden. Department of Clinical Physiology, Örebro University Hospital, Örebro, Sweden.
Örebro University, School of Health and Medical Sciences, Örebro University, Sweden. Department of Clinical Physiology, Örebro University Hospital, Örebro, Sweden.
2014 (English)In: Experimental and Clinical Cardiology, ISSN 1918-1515, Vol. 20, no 1, 2665-2673 p.Article in journal (Refereed) Published
Abstract [en]

Objectives: In patients with aortic stenosis the valve area is usually obtained by transthoracic echocardiography (TTE) and the continuity equation. The method is time consuming and another way to obtain the area is to trace the valves (planimetry).In the present study the both methods are compared.

Methods: 34 consecutive patients with known aortic stenosis were included and examined by TTE. The aortic valve area was obtained using planimetry in the short axis view and by using the continuity equation.

Results: There was no significant difference between the two methods (p=0.16) and the correlation was rather good (r=0.60; p<0.01). The agreement was better in the lower ranges of areas (<1.1 cm2) than in the higher ranges (>1.1 cm2).

Conclusions: The agreement between the both methods is rather good in the lower ranges of areas (<1.1 cm2), but worse in the higher ranges of areas (>1.1 cm2). The difference between the areas in the lower ranges can be up to 0.3 cm2, a difference that can be the difference between thoracic surgery or not. It is therefore best to still use the continuity equation during TTE.

Place, publisher, year, edition, pages
Pulsus Group Inc. , 2014. Vol. 20, no 1, 2665-2673 p.
Keyword [en]
Aortic stenosis; Continuity equation; Echocardiography; Planimetry
National Category
Cardiac and Cardiovascular Systems
Research subject
Cardiology
Identifiers
URN: urn:nbn:se:oru:diva-38881Scopus ID: 2-s2.0-84899758010OAI: oai:DiVA.org:oru-38881DiVA: diva2:764934
Available from: 2014-11-20 Created: 2014-11-20 Last updated: 2017-10-18Bibliographically approved

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Nygren, Britt-MarieEmilsson, Kent
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School of Health and Medical Sciences, Örebro University, Sweden
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CiteExportLink to record
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Citation style
  • apa
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