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Figure 2 Reconstructed 3-dimensional image of mitral annulus (MA), coronary sinus (CS), coronary arteries, and aorta. (Point a) Mitral annulus diameter in 4-chamber view (4C). (Point b) Mitral annulus diameter in 2-chamber view (2C); and (point c) Mitral annulus diameter in 3-chamber view (3C). All MA to CS measurements obtained in 2-dimensional images. LCX = left circumflex coronary artery.