Hình 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 R S amplitude ratio by age in lead II Age days Age months Age years Figure 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 13-67 15-82 18-68 18-50 72-33 59-10 f t .50 Mean SD .132 1022 21-21 5 5 0 1 109 128 95 100 113 91 95 113 107 99 289 910 62 CHAPTER R S amplitude ratio by age in lead III Age days Age months Age years Figure 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 Mean 7 41 900 002 090 9 SD 52 . 5 N 109 128 95 100 113 31 37 113 107 99 224 510 63 CHAPTER R S amplitude ratio by age in lead aVR Figure 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 0-4 0-54 0-41 Mean SD 8 5 .
