Acute Geometric Changes of the Mitral Annulus after Coronary Occlusion: A Real-Time 3D Echocardiographic Study
Journal of Korean Medical Science
;
: 217-223, 2006.
Artículo
en Inglés
| WPRIM
| ID: wpr-162138
ABSTRACT
We performed real-time 3D echocardiography in sixteen sheep to compare acute geometric changes in the mitral annulus after left anterior descending coronary artery (LAD, n=8) ligation and those after left circumflex coronary artery (LCX, n=8) ligation. The mitral regurgitation (MR) was quantified by regurgitant volume (RV) using the proximal isovelocity surface area method. The mitral annulus was reconstructed through the hinge points of the annulus traced on 9 rotational apical planes (angle increment=20 degrees). Mitral annular area (MAA) and the ratio of antero-posterior (AP) to commissure-commissure (CC) dimension of the annulus were calculated. Non-planar angle (NPA) representing non-planarity of the annulus was measured. After LCX occlusion, there were significant increases of the MAA during both early and late systole (p<0.01) with significant MR (RV 30+/-14 mL), while there was neither a significant increase of MAA, nor a significant MR (RV 4+/-5 mL) after LAD occlusion. AP/CC ratio (p<0.01) and NPA (p<0.01) also significantly increased after LCX occlusion during both early and late systole. The mitral annulus was significantly enlarged in the antero-posterior direction with significant decrease of non-planarity compared to LAD occlusion immediately after LCX occlusion.
Texto completo:
Disponible
Índice:
WPRIM (Pacífico Occidental)
Asunto principal:
Enfermedad de la Arteria Coronaria
/
Procesamiento de Imagen Asistido por Computador
/
Ovinos
/
Ecocardiografía Tridimensional
/
Vasos Coronarios
/
Ligadura
/
Válvula Mitral
Límite:
Animales
Idioma:
Inglés
Revista:
Journal of Korean Medical Science
Año:
2006
Tipo del documento:
Artículo
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