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Table 3 Global values of left ventricular mechanical contraction analysis obtained from apical views (longitudinal, A4C and A2C)

From: Comprehensive left ventricular mechanics analysis by speckle tracking echocardiography in Chagas disease

Variables Chagas Controles
Ch1A (n = 8) Ch1B (n = 13) Ch2 (n = 17) Ch3 (n = 9) C1 (n = 58) C2 (n = 7) C3 (n = 19)
APLAX
 LVel (cm/s) 3.28 ± 0.52a 3.81 ± 0.61 3.24 ± 0.77 3.22 ± 1.02d 4.42 ± 0.94 3.45 ± 1.26 2.52 ± 0.70
 LS (%) −21.68 ± 2.73 −21.57 ± 2.58 −13.86 ± 2.83 −9.82 ± 2.96 −20.79 ± 2.45 −14.69 ± 2.13 −7.89 ± 2.92
 LSR (1/s) −1.02 ± 0.36 −1.07 ± 0.36 −0.85 ± 0.23 −0.65 ± 0.11 −1.12 ± 0.22 −0.86 ± 0.18 −0.62 ± 0.18
 LD (mm) 9.49 ± 1.70 9.47 ± 1.50 6.75 ± 1.77 6.25 ± 1.86e 9.60 ± 1.51 7.46 ± 1.10 4.21 ± 1.65
A4C
 LVel (cm/s) 3.54 ± 0.49b 4.17 ± 0.60 3.33 ± 0.77 2.90 ± 1.03 4.54 ± 0.92 3.38 ± 0.73 2.73 ± 0.91
 LS (%) −23.16 ± 2.88 −21.06 ± 2.35 −15.54 ± 2.88 −9.96 ± 2.34 −21.16 ± 2.52 −14.73 ± 2.32 −8.48 ± 3.04
 LSR (1/s) −1.14 ± 0.17 −1.13 ± 0.19 −0.86 ± 0.16 −0.63 ± 0.16 −1.20 ± 0.16 −0.83 ± 0.18 −0.71 ± 0.23
 LD (mm) 10.80 ± 2.03 10.39 ± 1.41 8.44 ± 1.48 7.73 ± 2.02f 10.75 ± 1.60 8.28 ± 1.54 4.83 ± 2.15
A2C
 LVel (cm/s) 3.19 ± 0.58c 3.47 ± 0.50c 3.01 ± 0.56 2.86 ± 0.78 4.30 ± 0.85 3.33 ± 0.72 2.54 ± 0.65
 LS (%) −22.42 ± 2.80 −22.36 ± 2.22 −16.02 ± 2.96 −10.31 ± 1.36 −22.28 ± 2.82 −15.63 ± 2.42 −8.32 ± 2.90
 LSR (1/s) −1.05 ± 0.14g −1.17 ± 0.12 −0.83 ± 0.16 −0.69 ± 0.10 −1.21 ± 0.18 −0.84 ± 0.14 −0.64 ± 0.13
 LD (mm) 10.42 ± 1.65 10.67 ± 1.60 8.72 ± 1.40 6.46 ± 1.52 h 11.09 ± 1.91 8.41 ± 1.90 4.86 ± 1.53
GLOBAL
 LVel (cm/s) 3.33 ± 0.44i 3.81 ± 0.50i 3.20 ± 0.63 3.00 ± 0.79 4.43 ± 0.78 3.39 ± 0.77 2.60 ± 0.67
 LS (%) −22.42 ± 2.57 −21.67 ± 1.95 −15.14 ± 2.70 −10.03 ± 1.96 −21.41 ± 2.27 −15.01 ± 1.95 −8.23 ± 2.82
 LSR (1/s) −1.07 ± 0.17 −1.12 ± 0.13 −0.85 ± 0.15 −0.66 ± 0.11 −1.20 ± 0.17 −0.84 ± 0.13 −0.66 ± 0.16
 LD (mm) 10.23 ± 1.63 10.17 ± 1.36 7.97 ± 1.32 6.48 ± 1.57j 10.48 ± 1.45 8.05 ± 1.30 4.63 ± 1.6
  1. Data expressed as mean ± SD. APLAX apical longitudinal axis, A4C apical, 4-chambers, A2C apical 2-chambers, LVel longitudinal velocity, LS longitudinal strain, LSR longitudinal strain rate, LD longitudinal displacement, GLOBAL refers to the average values of the 3 incidences (APLAX, A4C and A2C)
  2. aTukey, p = 0.02; vs. C1
  3. bTukey, p = 0.007; vs. C1
  4. cTukey; Ch1A, p = 0.01, and Ch1B, p = 0.03; vs. C1
  5. dStudent’s t-test, p = 0.04, vs. C3
  6. eStudent t-test, p = 0.007; vs. C3
  7. fStudent t-test, p = 0.04; vs. C3
  8. gTukey test, p = 0.03; vs. C1
  9. hStudent t-test, p = 0.02; vs. C3
  10. iTukey; Ch1A, p <0.001, and Ch1B, p = 0.02; vs. C1
  11. jStudent t-test, p = 0.01; vs. C3