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Hình 4.2 R / S biên độ tỷ lệ theo độ tuổi dẫn đầu II, mỗi đường cong tương ứng với mức phần trăm chỉ (• = trung bình). Tỷ lệ R / S II giảm nhẹ sau khi sinh, sau đó tăng dần và ổn định từ 1-3 ngày tuổi và sau đó cho đến tuổi vị thành niên. | CHAPTER 4.2 R S amplitude ratio by age in lead II Age days Age months Age years Figure 4.2 R S amplitude ratio by age in lead II each curve corresponding to the Indicated percentile level . mean . The R S ratio in 11 decreases slightly after birth followed by gradual and steady increase from age 1-3 days and thereafter until adolescence. n Age Days Months Years 0-1 1-3 3-7 7-30 1-3 3-6 6-72 1-3 3-6 6-9 9-73 13-18 95 no.67 13-67 15-82 18-68 25.316 27.-15 18-50 31.76 72-33 59-10 f t .50 37.89 Mean 5.82 3.45 4.39 5.76 7.61 11.67 10.49 9.92 12.36 15.94 11.45 11.50 SD 12.37 .132 5.09 6.17 1022 21-21 22.85 14.67 21.09 5 16.48 19.71 5 0.00 0.00 0.00 0.00 0.00 0.00 0.63 0.00 0.00 0.00 0.00 0.00 0 1 109 128 95 100 113 91 95 113 107 99 289 910 62 CHAPTER 4.3 R S amplitude ratio by age in lead III Age days Age months Age years Figure 4.3 R S amplitude ratio by age In lead III each curve corresponding to the Indicated percentile level mean . Dominant R waves are registered in lead III throughout the pediatric ages. Age Days Months Years 0-1 1-3 3-7 7-30 1-3 3-6 6-72 1-3 3-6 6-9 9-73 75-78 95 17.50 13.40 12.15 13.61 11.00 11.50 7.80 24.50 18.00 20.07 22.00 23.59 Mean 7 41 6.30 5.80 5.90 4.62 4.95 900 002 0.90 090 9 7.25 8.19 SD 9.17 52 3.08 3.68 3.20 4.38 7.88 7.65 6.63 . 9.76 12.52 5 0.00 0.91 2.41 1.76 1.30 1.39 0.50 0.00 0.00 0.00 0.00 N 109 128 95 100 113 31 37 113 107 99 224 510 63 CHAPTER 4.4 R S amplitude ratio by age in lead aVR Figure 4.4 R S amplitude ratio by age In lead aVR each curve corresponding to the indicated percentile level . mean . Dominant R waves are registered in aVR from birth until age 3-6 months. The R S ratio stays little changed thereafter until adolescence. t Days Months Years 0-1 1-3 3-7 7-30 1-3 3-6 6-72 1-3 3-6 6-9 9-73 73-78 95 411 3-75 251 222 1.14 0-4 O.SSf 0-54 4.71 0-41 0.8 0.60 Mean 1.50 1.30 1.01 0.85 0.43 0.24 0.31 0.23 0.22 0.18 0.17 0.20 SD 1.67 1.34 0.83 0.86 N.48 0.18 0.24 0.20 0.27 8 0.18 0.19 5 0.00 0.00 0.00 0.00 0.05 0.03 0.00 .