Ischemic mitral regurgitation: a quantitative three-dimensional echocardiographic analysis.
Mathieu Vergnat1, Arminder S Jassar, Benjamin M Jackson
1Department of Surgery, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
The Annals of Thoracic Surgery
|December 22, 2010
Summary
Three-dimensional echocardiography reveals significant variability in mitral valve anatomy for patients with ischemic mitral regurgitation (IMR). This advanced imaging approach quantifies differences in annular size, leaflet tethering, and regurgitant orifice area, aiding preoperative assessment.
Area of Science:
- Cardiovascular Imaging
- Echocardiography
- Cardiac Surgery
Background:
- Ischemic mitral regurgitation (IMR) presents complex anatomical challenges.
- Preoperative assessment of IMR requires detailed characterization of mitral valve (MV) pathology.
- Three-dimensional echocardiography (3DE) offers a comprehensive approach to MV analysis.
Purpose of the Study:
- To apply a 3DE-based approach for preoperative MV analysis in IMR patients.
- To characterize the heterogeneous pathological anatomy associated with IMR.
- To quantitatively assess global and regional determinants of MV structure in IMR.
Main Methods:
- Intraoperative real-time 3D transesophageal echocardiograms were analyzed.
- 18 patients with IMR and 17 healthy controls were studied.
- A customized protocol assessed annular size/shape, leaflet tethering, papillary muscle anatomy, and regurgitant orifice area.
Main Results:
- IMR patients showed increased mitral annular area and MV tenting volume compared to controls.
- Anterior infarcts in IMR patients were associated with larger annuli and greater tenting volumes.
- Significant variability in annular shape and leaflet tethering was observed in IMR patients, unlike normal MV.
Conclusions:
- Customized 3DE analysis provides quantitative and systematic MV assessment in IMR.
- Severe IMR is characterized by extreme variability in pathological anatomy.
- This approach aids in understanding and managing IMR preoperative conditions.
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