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Figure 1 Multiplanar-Reformatted Views Representing the Constant Separation Between the MVA Plane and the CS–GCV

The 2-chamber (A) and 4-chamber (B) views show the measurements of the distance between the coronary sinus–great cardiac vein (CS–GCV) and the mitral valve annulus (MVA) plane (green line). The red line represents a parallel line drawn through the center of the CS–GCV. LA = left atrium; LCX = left circumflex coronary artery; LM = left main coronary artery; LV = left ventricle; RA = right atrium; RV = right ventricle.