Fig. 1

Cardiac cine images and three-dimensional pseudo-colour images of LV longitudinal strain in T2DM patients with mild, moderate and severe regurgitation. A1-3, T2DM patient with severe mitral regurgitation, female, 44 years old, left ventricular short axis (A1), four-chamber (A2), two-chamber (A3) cine sequence images showed large black regurgitation signal from left ventricle into left atrium (red arrow) reached the posterior wall of left atrium, RF = 65.31%; B1–3, T2DM with moderate mitral regurgitation, female, 58 years old, left ventricular short axis (B1), four-chamber (B2), two-chamber (B3) cine sequence images showed moderate mitral regurgitation (red arrow), RF = 41.90%; C1–3, T2DM patient with mild mitral regurgitation, male, 61 years old, left ventricular short axis (C1), four-chamber (C2), two-chamber (C3) cine sequence images showed a small regurgitation signal (red arrow), RF = 10.11%. A4, B4 and C4 were three-dimensional pseudo color maps of left ventricular longitudinal strain. T2DM, type 2 diabetes mellitus; RF, regurgitation fraction; PS, peak strain