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Table 2 Mechanical variables in patients with or without MWF

From: Mechanical effects of left ventricular midwall fibrosis in non-ischemic cardiomyopathy

  No MWF MWF P
LV dimensions
 LVEDV, mL 222 ± 80 277 ± 79 0.002
 LVESV, mL 166 ± 79 214 ± 83 0.007
 LV mass, g 137.6 ± 46.6 155.5 ± 71.1 0.052
Systolic deformation
 LVEF, % 27.5 ± 10.8 24.3 ± 12.9 0.20
 Ɛcc (%) −9.4 ± 4.76 −6.6 (2.57 0.004
 SSRcc (s−1) −0.56 ± 0.25 −0.38 (0.12 0.005
 Ɛrr (%) 17.8 ± 11.0 14.6 ± 10.1 0.18
 SSRrr (s−1) 0.84 ± 0.37 0.74 ± 0.40 0.31
 Ɛll (%) −9.4 ± 4.35 −7.6 ± 3.34 0.053
 SSRll (s−1) 0.56 ± 0.20 −0.49 ± 0.18 0.13
Diastolic deformation
 DSRcc (s−1) 0.46 ± 0.19 0.34 ± 0.11 0.010
 DSRrr (s−1) −0.75 ± 0.35 −0.55 ± 0.44 0.038
 DSRll (s−1) 0.50 ± 0.20 0.38 ± 0.14 0.006
Systolic torsion
 Basal systolic rotation (°)    
  Net Clockwise 3.40 ± 3.00 3.00 ± 2.23 0.513
  Magnitude 4.63 ± 2.64 3.67 ± 1.97 0.082
 Basal rotation rate (° s−1) 31.3 ± 14.5 22.1 ± 8.2 0.002
 Apical systolic rotation (°)    
  Net anti-clockwise −3.50 ± 3.28 −1.99 ± 1.97 0.024
  Magnitude 5.18 ± 3.15 3.52 ± 2.45 0.013
 Apical rotation rate (° s−1) −38.9 ± 21.8 −26.1 ± 15.8 0.005
 Average basal/apical rotation (°) 9.81 ± 4.48 7.20 ± 3.44 0.002
 LV twist (°) 6.31 ± 3.30 4.65 ± 2.18 0.004
 LV twist per unit length (°/cm) 1.34 ± 0.76 0.94 ± 0.55 0.005
 Torsional shear angle 0.83 ± 0.06 0.52 ± 0.07 0.008
 LV twist rate (° s−1) 48.4 ± 23.1 36.1 ± 17.1 0.01
 Torsional pattern    <0.001
  Normal torsion, n (%) 39 ± 46 10 ± 32  
  Rigid body rotation, n (%) 23 ± 28 21 ± 64  
  Reverse torsion, n (%) 22 ± 26 1 ± 4  
Diastolic torsion
 Basal rotation rate (° s−1) −34.1 ± 14.8 −28.0 ± 11.8 0.053
 Apical rotation rate (° s−1) 38.3 ± 20.1 24.9 ± 13.1 0.001
 LV untwist rate (° s−1) 44.5 ± 21.0 30.5 ± 14.9 <0.001
  1. Variables are expressed as mean ± SD
  2. MWF mid-wall fibrosis, SSR systolic strain rate, DSR diastolic strain rate, Ɛ strain