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The Four-dimensional Echocardiography of the Mitral Valve: Assessing the Dynamics and Geometry in Patients with Atrial Fibrillation


  • #AC/ARR 01-EP-11
  • Adult Cardiac Surgery/Arrhythmias. E-POSTER (ORAL) SESSION
  • E-Poster (oral)

The Four-dimensional Echocardiography of the Mitral Valve: Assessing the Dynamics and Geometry in Patients with Atrial Fibrillation

Igor Y. Klimchuk, Leo A. Bockeria, Olga L. Bockeria, Marina Y. Mironenko, Esma R. Jobava, Vladimir A. Shvartz

Bakulev Scientific Centre for Cardiovascular Surgery, Moscow, Russia

Date, time and location: 2018.05.25 13:30, Exhibition area, 1st Floor. Zone – A

Abstract

Purpose:to compare the geometry of the mitral valve (MV) in patients with mitral regurgitation (MR) induced by AF and in patients with Barlow disease using semi-automatic 4D echocardiographic models.

Methods: Study included24 patients. Patients with MR induced by long-standing persistent AF presented group #1 (n = 12), while patients with Barlow disease complicated by AF composed group #2, (n = 12). Baseline patients’ characteristics were similar in both groups. Semi-automatic measurements have been performed for the reconstructed MV during TTE Echocardiography. The variability of desired parameters during the cardiac cycle was also evaluated.

Results:Statistically significant differences with p<0,05 between group #1 and #2 were registered in the following parameters: vena contracta (mm) - 4.6 (4; 5) vs 8.6 (8; 9); MR Radius (cm) - 0,7 ± 0,16 vs 1,21 ± 0,16; MR ERO (cm²) - 0.33 ± 0.14 vs 0.61 ± 0.11; MR Fraction (%) - 30.4 (28; 38) vs 73 (69; 79); non-planar angle 138.44 ± 4.84 vs 161.66 ± 18.03; annular displacement (mm) - 2.74 ± 1.3 vs 5.93 ± 2.1, p = 0.03, the annular displacement velocity (mm/s) - 21.09 (11.76, 33.46 ) vs 38.35 (25.72, 50.98); annulus area fraction (%) - 5.8 (1.2, 7.4) vs 11.52 (10.1, 17.6).

Conclusion: Geometric changes were observed in both groups. Despite group #2 characterized by significantly more severe calculated parameters of MR, group #1 demonstrated a significant decrease of the velocity of annular displacement and annulus area fraction. This confirms that persistent AF initiates and sustains deterioration of the geometry and movements (function) of the MV without degenerative changes.


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