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Table 2 Pacemaker parameters and QRS duration

From: Chronology of cardiac dysfunction after permanent pacemaker implantation: an observational 2 year prospective study in North India

  N Min Max Mean SD p value
Resistance-A (Ohm)
 Before Discharge 63 430.0 695.0 535.49 61.32  
 1 month 62 62.0 671.0 511.34 90.66 0.566
 6 month 60 425.0 722.0 575.13 61.43 0.108
Resistance-V (Ohm)
 Before Discharge 96 345.0 1380.0 595.20 112.47  
 1 month 94 318.0 1335.0 565.33 111.19  
 6 month 90 355.0 1445.0 628.16 119.59 0.7
Voltage-A (Volt)
 Before Discharge 63 0.5 4.0 1.00 0.44  
 1 month 62 0.3 1.5 0.85 0.26 0.053
 6 month 60 0.3 1.5 0.77 0.24 0.066
Voltage-V (Volt)
 Before Discharge 96 0.3 4.0 0.96 0.39  
 1 month 94 0.3 2.0 0.85 0.27 0.1
 6 month 90 0.3 6.2 0.87 0.63 0.1
Sensitivity-A
 Before Discharge 63 0.5 6.2 2.71 1.37  
 1 month 62 0.5 6.0 2.57 1.23 0.099
 6 month 60 0.5 6.5 2.45 1.24 0.085
Sensitivity-V
 Before Discharge 96 0.0 15.6 5.82 5.45  
 1 month 94 0.0 15.0 6.24 5.63 0.100
 6 month 90 0.0 15.6 6.40 5.61 0.126
Pacing percentage (%)
 Before Discharge 96 91 96 93.5 2.12 0.723
 1 month 92 89 94 91.5 1.32 0.542
 6 month 95 92 97 94.5 3.21 0.891
QRS duration (msec)
 At admission 96 82.0 202.0 133.18 29.45  
 Before Discharge 96 92.0 204.0 150.29 24.74 0.000
 1 month 94 84.0 188.0 140.87 20.38 0.001
 6 month 90 98.0 184.0 146.03 19.82 0.000