Striking changes in heart rate are noted from newborn to adolescence.. The heart rate increases from birth to ages 7–30, days and 1–3 months.. From that age forward, the heart rate decre
Trang 2Heart rate by age
50 60 70 80 90 100 110 120 130 140 150 160 170 180 190
0-1 1-3 3-7 7-30 1-3 3-6 6-12 1-3 3-6 6-9 9-13 13-18
95%
75%
50%
25%
5%
Figure 1.1 Heart rate by age, each curve corresponding to the indicated percentile level ( • = mean) Striking changes in heart rate are noted from newborn to adolescence The heart rate
increases from birth to ages 7–30, days and 1–3 months From that age forward, the heart rate decreases with increasing age, most rapidly from age 6–12 months to 1–3 years
Days Months Years Age 0–1 1–3 3–7 7–30 1–3 3–6 6–12 1–3 3–6 6–9 9–13 13–18
(±SD) 12.86 13.07 15.91 15.58 14.66 11.70 18.67 13.09 11.96 14.68 14.08 14.50
Trang 3PR interval by age
70
80
90
100
110
120
130
140
150
160
170
180
0-1 1-3 3-7 7-30 1-3 3-6 6-12 1-3 3-6 6-9 9-13 13-18
95%
75%
50%
25%
5%
Age, days Age, months Age, years
Figure 1.2 PR interval by age, each curve corresponding to the indicated percentile level ( • = mean) The PR interval remains little changed after birth and during early infancy It
increases with increasing age, from age 6 months through to adolescence
Days Months Years Age 0–1 1–3 3–7 7–30 1–3 3–6 6–12 1–3 3–6 6–9 9–13 13–18
(±SD) 10.65 11.54 12.65 13.48 11.81 11.36 12.93 10.85 10.56 14.52 17.35 17.94
Trang 4PR interval by heart rate
0 20 40 60 80 100 120 140 160 180 200
150-Heart Rate per Minute
95%
75%
50%
25%
5%
Figure 1.3 PR Interval by heart rate, each curve corresponding to the indicated percentile
entire pediatric ages
Heart
rate 1–69 70–79 80–89 90–99 100–109 110–119 120–129 130–139 140–149 150–
(±SD) 21.54 18.53 15.96 13.71 14.91 17.48 14.94 0.00 0.00 0.00
Trang 5QT interval by age
0 50
100
150
200
250
300
350
400
450
0-1 1-3 3-7 7-30 1-3 3-6 6-12 1-3 3-6 6-9 9-13 13-18
95% 75% 50% 25% 5%
Age, years Age, days Age, months
Figure 1.4 QT interval by age, each curve corresponding to the indicated percentile level ( • = mean) The QT interval decreases slightly after birth, reaching the lowest at age 7–30 days.
From that age forward, the QT interval increases along with increasing age up to adolescence
Days Months Years Age 0–1 1–3 3–7 7–30 1–3 3–6 6–12 1–3 3–6 6–9 9–13 13–18
(±SD) 26.63 23.09 17.92 17.85 18.90 15.95 23.81 21.69 21.11 23.41 26.02 27.00
Trang 6QT interval by heart rate
200 215 230 245 260 275 290 305 320 335 350 365 380 395 410 425 440 455 470 485 500
150-Heart Rate per Minute
95%
75%
50% 25% 5%
Figure 1.5 QT interval by heart rate, each curve corresponding to the indicated percentile
Heart
rate 1–69 70–79 80–89 90–99 100–109 110–119 120–129 130–139 140–149 150–
(±SD) 21.54 17.50 15.46 14.51 15.18 16.39 15.61 0.00 0.00 0.00
Trang 7QTc interval by age
0 100
200
300
400
500
600
0-1 1-3 3-7 7-30 1-3 3-6 6-12 1-3 3-6 6-9 9-13 13-18
95%
75%
50%
25%
5%
Figure 1.6 QTc interval by age, each curve corresponding to the indicated percentile level ( • = mean) The corrected QT interval decreases slightly after birth, and returns to the previous
level by age 1–3 months, then remains unchanged until adolescence
Days Months Years Age 0–1 1–3 3–7 7–30 1–3 3–6 6–12 1–3 3–6 6–9 9–13 13–18
(±SD) 26.44 23.09 19.15 25.15 20.56 17.50 20.17 16.27 15.83 18.09 17.35 23.52
Trang 8QTc interval by heart rate
300 320 340 360 380 400 420 440 460 480
150-Heart Rate per Minute
95%
75%
50%
25%
5%
Figure 1.7 QTc interval by heart rate, each curve corresponding to the indicated percentile
rate up to a rate of 110–119 per minute, then remains little or unchanged
Heart
rate 1–69 70–79 80–89 90–99 100–109 110–119 120–129 130–139 140–149 150–
(±SD) 22.76 19.70 17.90 18.44 19.74 22.19 21.81 0.00 0.00 0.00
Trang 9QRS duration by age
0 20
40
60
80
100
120
0-1 1-3 3-7 7-30 1-3 3-6 6-12 1-3 3-6 6-9 9-13 13-18
95%
75%
50%
25%
5%
Figure 1.8 QRS duration by age, each curve corresponding to the indicated percentile level ( • = mean) QRS duration steadily and gradually increases with increasing age, from birth to
adolescence
Days Months Years Age 0–1 1–3 3–7 7–30 1–3 3–6 6–12 1–3 3–6 6–9 9–13 13–18
(±SD) 10.65 11.54 9.44 8.06 10.55 8.31 9.04 10.85 10.56 7.53 8.67 9.85
Trang 10RR interval by age
0 200 400 600 800 1000 1200
0-1 1-3 3-7 7-30 1-3 3-6 6-12 1-3 3-6 6-9 9-13 13-18
95%
75%
50%
25%
5%
Age, years
Figure 1.9 RR interval by age, each curve corresponding to the indicated percentile level ( • = mean) The RR interval decreases slightly from birth to ages 7–30 days and 1–3 months.
From that age forward, the RR interval increases with a wider range along with increasing age until adolescence
Days Months Years Age 0–1 1–3 3–7 7–30 1–3 3–6 6–12 1–3 3–6 6–9 9–13 13–18
(±SD) 47.94 46.18 53.46 48.33 40.57 37.92 71.09 75.93 79.16 96.94 95.41 138.81