Does The Mitral Annulus Shrink or Enlarge During Systole? A Real-Time 3D Echocardiography Study

• DOI: 10.3346/jkms.2009.24.2.203
• Publication Date: 2009-04-23T09:52:12Z
• Authors: Jun Kwan; Min-Jae Jeon; Dae-Hyeok Kim; Keum-Soo Park; Woo-Hyung Lee
• Keywords: Systole; Mitral annulus; Cardiac cycle; Annulus (botany); Torso

This study was conducted to explore the geometrical changes of mitral annulus during systole.The 3D shape reconstructed in 13 normal subjects who had structure apparatus using real-time echocardiography (RT3DE) and computer software.The two orthogonal (antero-posterior commissure-commissure) dimensions, areas (2D projected surface) non-planarity were estimated early, mid late systole.We demonstrated that MA a "saddle shape" appearance it consistently enlarged mainly antero-posterior direction from early systole with lessening its non-planarity, as determined by reconstruction RT3DE software.