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Table 4 Longitudinal rotational degrees in HCM patients and normal subjects at 17 different points in two cardiac cycles (mean ± s.d.)

From: Left ventricular systolic function changes in hypertrophic cardiomyopathy patients detected by the strain of different myocardium layers and longitudinal rotation

  HCM (36) Normal (36)
Points Time(ms) Rotation Degree(°) Time(ms) Rotation Degree(°)
Q 0 0 0 0
MVC 25 ± 7 −0.19 ± 0.36 25 ± 6 −0.12 ± 0.32
IVS 48 ± 8 −0.70 ± 0.79 45 ± 7 −0.13 ± 0.62
AVO 73 ± 13 −1.47 ± 1.55 65 ± 13 −0.17 ± 0.98
25% 147 ± 15 −3.29 ± 2.40 142 ± 15 −0.22 ± 2.24
50% 220 ± 21 −4.57 ± 2.63 219 ± 18 −0.02 ± 2.44
75% 293 ± 29 −4.92 ± 2.65 296 ± 23 0.02 ± 2.42
AVC 367 ± 37 −4.38 ± 2.53 373 ± 28 −0.41 ± 2.35
IVR 409 ± 35 −3.63 ± 2.30 402 ± 30 0.61 ± 2.17
MVO 451 ± 43 −2.86 ± 2.17 431 ± 37 −0.71 ± 1.97
E-Peak 534 ± 53 −2.12 ± 1.86 507 ± 41 0.36 ± 1.39
E-End 716 ± 95 −1.38 ± 1.29 658 ± 70 0.68 ± 1.09
A-Onset 808 ± 190 −1.26 ± 1.21 749 ± 104 −0.52 ± 0.90
A-Peak 848 ± 128 −0.74 ± 0.92 809 ± 104 0.34 ± 0.80
A-End 890 ± 141 −0.28 ± 0.53 854 ± 105 −0.11 ± 0.41
Q-2 904 ± 147 0 875 ± 98 0
AVO-2 971 ± 152 −1.16 ± 0.89 940 ± 103 −0.18 ± 1.05
  1. When viewed from the above values, positive values of the rotation degree were considered as count-clockwise rotation, while negative values were considered as clockwise rotation
  2. MVC mitral valve closure, IVS isovolumic contraction, AVO aortic valve opening, AVC aortic valve closure, IVR isovolumic relaxation, MVO mitral valve opening