Results (1) Comparison between uremia group (nondialysis patients) and control group: systolic arterial pressure, diastolic arterial pressure and pulse pressure of uremic patients increased (t=-4.445, -4.531 and -2.203, P<0.05); left atrial anterior and posterior diameter (LAAPD), left ventricular end diastolic diameter (LVEDD), left ventricular end systolic diameter (LVESD), left ventricular end diastolic volume (LVEDV), left ventricular end systolic volume (LVESV) and left ventricular mass index (LVMI) of uremic patients were larger. Interventricular septum thickness (IVST), left ventricular posterior wall thickness (LVPWT) and relative wall thickness (RWT) were thicker (t=-6.461, -5.168, -4.660, -3.578, -2.872, -6.819, -6.251, -7.108 and -2.659, P<0.05); the longitudinal, radial and circumferential directions peak systolic strain of 16 segment myocardial of uremic patients decreased (the longitudinal strain: t=-7.063, -5.391, -3.351, -5.323, -5.586, -7.842, -5.265, -5.587, -5.037, -3.051, -4.584, -3.936, -4.168, -9.783, -9.175 and -3.805; the radial strain: t=3.659, 3.58, 5.368, 2.649, 2.928, 4.344, 2.754, 5.031, 5.025, 2.277, 2.691, 2.731, 3.187, 4.179, 5.292 and 4.429; the circumferential strain: t=-5.158, -3.959, -2.164, -3.592, -2.324, -5.672, -4.946, -7.184, -7.748, -5.014, -2.439, -6.299, -8.072, -8.410, -7.884 and -8.854, P<0.05). (2) Comparison between uremic patients before and after dialysis: the systolic arterial pressure of uremic patients decreased after dialysis (t=2.833, P<0.05); LAAPD and LVMI of uremic patients decreased after dialysis (t=4.805, 2.631, P<0.05); BAS, BA, BIL, BI, BIS, MAS, MAL, MIL, APA and APL longitudinal systolic peak strain and the BAL, MAL, MIS, APS, APL and API radial systolic peak strain of uremic patients increased after dialysis (t=5.199, 4.127, 3.781, 3.380, 4.114, 3.116, 2.840, 3.243, 4.003 and 5.605, P<0.05; t=-3.343, -3.687, -2.488, -2.921, -3.826 and -3.339, all P<0.05). There were no statistical differences in circumferential peak systolic strain (P>0.05).