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Abstract :
Introduction: Mitral annulus (MA) assessment is of utmost
importance for the management of patients with mitral valve (MV)
abnormalities and Three-dimensional transesophageal echocardiography
(3D-TOE) has been the only reliable echocardiographic method for the
evaluation of the mitral annulus by now. However, newer transthoracic
echocardiography (TTE) probes have enabled to provide accurate
measurements when TOE is contraindicated. The aim of this study is to
assess the feasibility of 3D-TTE analysis of MA and the level of
agreement with 3D-TOE measurements.
Methods: A total of 121 consecutive patients were assessed with
3D-TTE and TOE. All MA parameters were retrospectively analyzed with the
dedicated 4D-autoMVQ application. Bland-Altman analysis and intraclass
correlation coefficient were used for the comparison and agreement
between the two methods. Half of our patients had normal mitral valves
and served as control group, while the other half had various mitral
valve pathologies.
Results : AutoMVQ analysis was not feasible in 11 out of 121 TTE
examinations (91% feasibility) and in 4 out of 121 TOE examinations
(96% feasibility). MA area and perimeter were slightly larger in TTE
than those measured by TOE (12.7±3.6 vs 12.4±3.2cm2for area and 12.7±1.7 vs
12.5±1.6cm for perimeter), however
still showing strong correlation (r=0.942 and r=0.922 respectively). The
majority of MV measurements were similar between the two methods with
strong correlation (r>0.80).
Conclusions: Assessment of the MV with 3D TTE with dedicated
MVQ software is feasible and accurate, showing strong correlation and
agreement with TOE measurements.
Brief title : Mitral annulus assessment with 3D TTE and TOE
Key words : 3D echocardiography, mitral annulus, transesophageal
echocardiography