Table 1 Comparison between the three studied groups according to echo parameters and GLS

From: Predictors of pacing induced left ventricular dysfunction and cardiomyopathy assessed by three-dimensional echocardiography and speckle tracking strain

Predisposing
factors
No decline in LVEF
(n = 25)
Decline in LVEF χ2 MCp
PIVD
(n = 19)
PICMP(n = 6)
  No. % No. % No. %
EF%
 Pre-pacing 68.0 ± 6.84 75.79 ± 5.27 68.33 ± 9.83 7.856* 0.001*
 Post-pacing (at 7 days) 64.16 ± 7.64 67.74 ± 8.19 47.83 ± 6.79 15.105* < 0.001*
 Post-pacing (at 6 months) 61.76 ± 6.22 57.79 ± 4.38 36.0 ± 10.79 40.815* < 0.001*
ESV (ml)
 Pre-pacing 34.12 ± 11.94 26.53 ± 8.52 34.0 ± 10.08 3.031 0.058
 Post-pacing (at 7 days) 30.84 ± 10.59 28.21 ± 12.09 46.33 ± 5.82 6.562 0.003*
 Post-pacing (at 6 months) 34.36 ± 9.81 37.53 ± 11.55 73.50 ± 35.49 16.313* < 0.001*
EDV (ml)
 Pre-pacing 104.8 ± 25.81 104.7 ± 23.58 111.3 ± 25.87 0.342 0.843
 Post-pacing (at 7 days) 89.40 ± 22.49 89.26 ± 22.92 93.67 ± 24.48 0.081 0.960
 Post-pacing (at 6 months) 90.84 ± 22.22 89.0 ± 24.47 111.8 ± 40.35 1.222 0.543
SV (ml)
 Pre-pacing 70.64 ± 17.70 77.11 ± 17.32 77.33 ± 27.52 0.748 0.479
 Post-pacing (at 7 days) 58.48 ± 16.12 61.05 ± 17.22 47.33 ± 19.36 1.512 0.231
 Post-pacing (at 6 months) 56.44 ± 15.36 51.68 ± 14.29 38.33 ± 13.09 3.700 0.032
COP (L/min)
 Pre-pacing 2.96 ± 0.87 3.32 ± 1.05 2.63 ± 0.74 3.722 0.156
 Post-pacing (at 7 days) 3.90 ± 0.95 4.39 ± 1.43 3.60 ± 1.21 1.715 0.424
 Post-pacing (at 6 months) 3.70 ± 0.92 3.72 ± 1.38 2.72 ± 0.69 4.754 0.093
GLS%
 Pre-pacing − 19.52 ± 3.62 − 20.79 ± 3.43 − 15.50 ± 2.07 5.482* 0.007*
 Post-pacing (at 7 days) − 16.80 ± 3.59 − 14.21 ± 4.21 − 10.17 ± 1.17 8.609 0.001*
 Post-pacing (at 6 months) − 15.40 ± 3.46 − 12.32 ± 4.60 − 8.0 ± 2.76 9.888 < 0.001*
  1. *Statistically significant at p ≤ 0.05