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Imaging Studies for Cardiovascular System I:Echocardiography

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Related Experiment Video

Updated: Jul 12, 2026

Transthoracic Echocardiography in Mice

Transthoracic Echocardiography in Mice

Published on: May 29, 2010

Comparison between aortic annulus motion and mitral annulus motion obtained using echocardiography.

K Emilsson¹, R Egerlid, B M Nygren

¹Department of Clinical Physiology, Orebro University Hospital, Orebro, Sweden. kent.emilsson@orebroll.se

Clinical Physiology and Functional Imaging

|August 31, 2006

Summary

The aortic annulus motion (AAM) amplitude is similar to mitral annulus motion (MAM), but measurements vary by site. M-mode echocardiography offers better reproducibility for AAM than 2-D methods.

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Area of Science:

Cardiology
Echocardiography
Cardiac Mechanics

Background:

Previous research indicates the aortic root moves toward the left ventricular apex during systole.
The amplitude of aortic annulus motion (AAM) and mitral annulus motion (MAM) has not been directly compared.
Reproducibility of AAM measurement using M-mode and 2-D echocardiography requires investigation.

Purpose of the Study:

To compare the amplitude of aortic annulus motion (AAM) with mitral annulus motion (MAM) in healthy subjects.
To evaluate the intra- and interobserver reproducibility (IIOR) of AAM measurements using M-mode and 2-D echocardiography.

Main Methods:

Echocardiographic assessment of AAM and MAM in 21 healthy individuals.
Measurement of AAM and MAM at various cardiac sites.
IIOR assessment of AAM measurements in 10 subjects using both M-mode and 2-D techniques.

Main Results:

Average AAM (15.3 ± 1.5 mm) and MAM (15.6 ± 1.5 mm) showed no significant difference.
AAM at the septal site (16.3 ± 2 mm) was not significantly different from MAM, but AAM at the lateral site (14.2 ± 1.6 mm) was significantly lower (P<0.001).
M-mode echocardiography demonstrated good IIOR for AAM, while 2-D echocardiography showed poor IIOR.

Conclusions:

Aortic annulus motion (AAM) amplitude is comparable to mitral annulus motion (MAM).
Significant differences in AAM measurements between septal and lateral sites exist, potentially due to anatomical factors or measurement difficulties.
M-mode echocardiography is the preferred method for measuring AAM due to superior intra- and interobserver reproducibility compared to 2-D echocardiography.