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European Heart Journal 1982 3(2):159-163;
Copyright © 1982 by the European Society of Cardiology.
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© 1982 by The European Society of Cardiology

Echocardiographic estimation of left atrial size from the apical view

G. GRADIN-FRIMMER*, C. LASSVIK, E. NYLANDER and B. WRANNE

Department of Clinical Physiology, Linkoping University Hospital S-581 85 Linköping, Sweden

Requests for reprints to: Bengt Wranne, MD, Department of Clinical Physiology, Regionsjukhuset, S-581 85 Linköping, Sweden.

Abstract

Left atrial (LA) size was estimated from the apical and parasternal (pst) views in 113 patients (37 with aortic and 23 with mitral valvular lesions, 22 with cardiomyopathies and other heart diseases and 25 cardiovascularly healthy subjects). There was a significant correlation between the two measurements of the LA [LA (apex) = –3.1 + 1.2 LA pst (mm, r= 0.82, s.d. = 9.1)]. The apical measurement was significantly greater than the parasternal (P < 0.001). A considerable individual variation was found in the relationship between the parasternal and the apical LA measurement and this could not be correlated with body or thorax dimensions nor with diagnosis. It therefore seems advisable to measure the left atrium routinely from both the parasternal and the apical positions. We suggest that the upper limit of normal for the left atrium in the apex view should be taken as 45 mm.

Key Words: Echocardiography • left atrium • apical view • reproducibility • 2-D


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