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Table 3 Comparison between single- and dual-chamber pacing groups including all the measured parameters at the three time intervals (pre-pacing, at 1 week and 6 months post pacing)

From: Effects of cardiac pacemakers on left ventricular volumes and function assessed by 3D echocardiography, Doppler method, and global longitudinal strain

Measurement Pre-pacing p value Post pacing at 1 week p value Post pacing
At 6 months
p value
EDV (ml)
 Single-chamber 102.6 ± 25.95 0.360 86.81 ± 25.09 0.259 88.93 ± 30.39 0.098
 Dual-chamber 109.0 ± 22.91   93.43 ± 18.80   97.04 ± 19.62  
ESV (ml)
 Single-chamber 28.48 ± 9.67 0.055 28.96 ± 11.25 0.080 36.52 ± 21.87 0.143
 Dual-chamber 34.43 ± 11.75   34.91 ± 12.24   44.65 ± 15.66  
SV (ml)
 Single-chamber 74.07 ± 20.20 0.944 57.78 ± 17.47 0.880 52.56 ± 17.54 0.962
 Dual-chamber 73.7 ± 17.35   58.52 ± 17.02   52.35 ± 13.13  
HR (bpm)
 Single-chamber 41.63 ± 8.45 0.938 64.04 ± 9.79 <0.001* 62.00 ± 6.45 <0.001*
 Dual-chamber 41.83 ± 9.36   77.96 ± 10.85   76.43 ± 9.43  
COP (L/m)
 Single-chamber 3.07 ± 0.99 0.853 3.69 ± 1.13 0.032* 3.27 ± 1.12 0.026*
 Dual-chamber 3.04 ± 0.90   4.48 ± 1.14   3.96 ± 1.04  
EF (%)
 Single-chamber 72.41 ± 6.55 0.156 65.96 ± 8.41 0.058 59.56 ± 9.85 0.071
 Dual-chamber 69.35 ± 8.46   60.74 ± 10.62   54.35 ± 10.04  
GLS (%)
 Single-chamber -19.41 ± 3.53 0.819 -15.44 ± 4.09 0.446 -13.52 ± 4.66 0.766
 Dual-chamber -19.65 ± 3.98 -14.52 ± 4.39 -13.13 ± 4.45
  1. Values are presented as mean ± SD
  2. *Statistically significant at P ≤ 0.05