Assessment of the tilting properties of the human mitral valve during three main phases of the heart cycle: an echocardiographic study
| Autor: | Daniel Vanhercke, Patrick Segers, Pascal Verdonck, Ilse Van Tricht, Tom Claessens, Hans Vandekerckhove |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Aortic valve
Adult Heart Valve Prosthesis Implantation Male Plane (geometry) business.industry Diastole Annulus (mathematics) Anatomy Myocardial Contraction medicine.anatomical_structure Ventricle Echocardiography Mitral valve cardiovascular system medicine Perpendicular Image Processing Computer-Assisted Humans Mitral Valve Radiology Nuclear Medicine and imaging Female Systole Cardiology and Cardiovascular Medicine business |
| Zdroj: | Echocardiography (Mount Kisco, N.Y.). 23(4) |
| ISSN: | 0742-2822 |
| Popis: | Rationale and Objectives: In experimental models of the left heart, the mitral valve (MV) is commonly implanted perpendicular to a central axis of the apex/MV. To adapt this to a more correct anatomical model, as well as for further studies of the left ventricle, we created a database of implantation angles of the MV and annulus during three main phases of the heart cycle, based on standard cardiac ultrasound measurements. Materials and Methods: Twenty-eight patients were studied with the standard cardiac ultrasound equipment. From the apical echo window, an anteroposterior (AP) plane and a perpendicular commisure-commisure (CC) plane were generated during three critical moments in the heart cycle: systole (S); diastole early filling (E); and diastole late filling (A). In both planes, the angles between the annular plane and each mitral leaflet, as well as the angle between a theoretical longitudinal axis through the apex and center of the MV orifice and the mitral annulus plane, were measured with a custom-made application of Matlab R14. Results: We observed an inclination of the angle mitral annulus/central left ventricle axis, with its lowest point in the direction of the aortic valve (AP plane) of 85 degrees +/- 7 degrees in systole (S), 88 degrees +/- 8 degrees in early diastole (E), and 88 degrees +/- 7 degrees in late diastole (A). In the CC plane, we observed an almost horizontal implantation of 91 degrees +/- 5 degrees in systole (S), 91 degrees +/- 8 degrees in early diastole (E), and 91 degrees +/- 7 degrees in late diastole (A). |
| Databáze: | OpenAIRE |
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