ECG in the Child and Adolescent - part 10

Hình 4,12 R / S biên độ tỷ lệ theo độ tuổi dẫn đầu V6, mỗi đường cong tương ứng với mức phần trăm chỉ (• = trung bình). Sự tiến bộ của tỷ lệ biên độ R / S động cơ V6 dẫn là ấn tượng. Tỷ lệ này vẫn thay đổi chút ít sau khi sinh, sau đó tăng dần từ tuổi 1 tháng, sau đó tiếp tục tăng cho đến khi độ tuổi 13-18 tuổi. | CHAPTER R S amplitude ratio by age in lead V6 Age days Age months Age years Figure R S amplitude ratio by age in lead V6 each curve corresponding to the indicated percentile level mean . The progress of R S amplitude ratio in lead V6 is striking. The ratio stays little changed after birth then increases from age 1 month then continues to increase forward until age 13-18 years. Age Days Months Years -a 1-3 3- -n30 - 6 6-1 a 1-- 3-6 -a 9a13 13-18 95 1 Mean 4 8 48SD 5 5259 10 62 11610 1 222 9 O 56 139 62. 0. 52. 2 .2 N f 109 ._. 128 15 95 - 100 113 91 97 113 107 99 289 510 72 CHAPTER R amplitude in lead V3 s amplitude in lead V3 by age Age days Age months Age years R amplitude In lead V3 s amplitude In lead V3 by age each curve corresponding to the indicated percentile level . mean The sum of R wave amplitude in lead V3 and s wave amplitude in V3 decreases slightly after birth. It increases after age 7-30 4eys reaching the highest value at ages 3-6 months and 1-3 years then decreases thereafter up to age 13-18 years. Age Days Months Years 0-1 1-3 3-7 7-30 1-3 3-6 6-12 1-3 3-6 6-9 9-73 13-18 95 433 .3 3 0 Mean SD 5 15Ỉ3 N 109 128 95 109 120 6 91 113 109 100 280 510 73 CHAPTER R amplitude in lead V6 s amplitude in lead V1 by age Age days Age months Age years R amplitude In lead V6 s amplitude In Lead V1 by age each curve corresponding to the Indicated percentile level mean . The sum of R wave amplitudeie V6 andS wave amplitude in V1 stays almost unchanged in the first week of life. From that age forward it increases .