Welch Allyn Cardioperfect Workstation, PEDMEANS ECG Interpretation Module - Physicians - User Manual - Manual (Page 49)

CardioPerfect Workstation
PEDMEANS ECG Interpretation Module Physicians Manual
DIR 80015051 Rev. C 49 / 55
Appendix A Normal limits
The following tables show normal limits for the ECG parameters as approximations of the
continuous age-dependent normal limits, which are used in the classification part of PEDMEANS.
Figures denote mean and, in parentheses, upper limit of normal (ULN) and lower limit of normal
(LLN) (the latter only if diagnostically relevant).
Lead-independent parameters
Table A1. Lead-independent parameters: Mean (LLN, ULN)
0-1 mo 1-3 mo 3-6 mo 6-12 mo 1-3 yr 3-5 yr 5-8 yr 8-12 yr 12-16 yr
Heart rate (BPM)
163
(136, 206)
155
(126, 193)
140
(116, 178)
134
(106, 185)
126
(97, 174)
99
(77, 122)
89
(64, 113)
80
(59, 106)
75
(53, 102)
P axis (

)
52
(23, 82)
50
(12, 75)
49
(14, 77)
49
(9, 83)
47
(

4 , 89)
42
(

4, 82)
38
(

20, 74)
40
(

13, 81)
39
(

15, 82)
P duration (ms)
69
(60, 81)
75
(61, 99)
80
(66, 99)
83
(68, 102)
85
(67, 106)
88
(74, 106)
91
(74, 107)
96
(78, 120)
100
(80, 124)
PRn interval (ms)
0.26
(0.19,0.32)
0.25
(0.19,0.33)
0.25
(0.19, 0.32)
0.24
(0.17, 0.31)
0.24
(0.16, 0.31)
0.20
(0.14,0.28)
0.19
(0.12, 0.27)
0.18
(0.12,0.25)
0.17
(0.10, 0.25)
QRS axis (

)
106
(63, 149)
83
(43, 127)
67
(12, 108)
68
(21, 114)
68
(17, 118)
68
(15, 109)
70
(14, 115)
65
(3, 116)
63
(4, 107)
QRS duration (ms)
65
(79)
63
(77)
66
(80)
67
(84)
70
(87)
74
(91)
79
(96)
84
(101)
90
(109)
QTc interval (ms)
413
(369, 460)
422
(381, 471)
423
(384, 477)
419
(387, 468)
423
(390, 464)
430
(402, 457)
430
(393, 465)
428
(387, 465)
428
(379, 477)