Abstract 20485: Quantification of Mitral Annular Dynamics in Mitral Regurgitation by Three-Dimensional Transesophageal Echocardiography
Objective: To determine the feasibility of quantifying changes in the mitral valve (MV) annulus in different MV diseases by three-dimensional transesophageal echocardiography (3D-TEE) and their value in the selection of appropriate MV surgery for patients (pts) with MR, pts with at least moderate ischemic mitral regurgitation (MR) were compared to pts with at least moderate MR due to MV prolapse and to normal subjects without MR (controls).
Methods: 3D-TEEs were performed on 19 pts with at least moderate ischemic MR, on 23 pts with at least moderate MR due to MVP and on 20 controls without MR. Changes in MV annular dynamics were quantified using Philips 7.0 QLAB software.
Results: (1) Significant differences in MV annular dynamics were seen between the ischemic MR group and both the MVP and control groups in the following parameters: annular projected area change rate (ischemic: 17.2±4.4%, MVP: 22.8±8.8%, controls: 22.5±5.7%, p<0.05), annular perimeter change rate (ischemic: 10.4±3.5%, MVP: 14.4±5.4%, controls: 13.8±4.2%, p<0.05), annular height change rate (ischemic: 45.6±15.5%, MVP: 57.1±11.1%, controls: 54.4±11.6%, p<0.05), annular maximum displacement from end diastole (ischemic: 11.2±2.0mm, MVP: 14.4±1.4mm, controls: 15.1±1.8mm, p<0.05), maximum annular displacement timing (ischemic: 60±6% of R-R, MVP: 53±6% of R-R, control: 55±5.0% of R-R, p<0.05). No significant differences were seen in MV annular projected area, annular perimeter and annular height. (2) There were not significant differences in MV annular parameters between the MVP and control groups.
Conclusions: MV annular tracking by 3D-TEE was feasible in all study participants. Significant differences in MV annular dynamics were seen between pts with ischemic MR compared to MVP group with MR. 3-TEE may be used to quantitatively assess MV annular changes in different MV diseases causing MR, and to provide data that is useful for the appropriate selection of MV surgery.
- © 2010 by American Heart Association, Inc.