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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