Hình 3,22 S biên độ theo độ tuổi dẫn V1, mỗi đường cong tương ứng với mức phần trăm chỉ (• = trung bình). S sóng trong V1 chì nhỏ hoặc vắng mặt sau khi sinh, tăng chiều sâu của họ rất ít trong giai đoạn trứng, sau đó là nổi bật hơn sau đó cho đến khi độ tuổi 13-18 tuổi. | CHAPTER s amplitude by age in lead V1 s amplitude by age In lead V1 each curve corresponding to the Indicated percentile level mean s waves in lead V1 are small or absent after birth increasing their depth little during infancy then are more prominent thereafter until age 13-18 years. rt 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 e_ 13-18 95 r Mean 1 SD 0-21 0- 0 5 9 p 109 12 8 95 100 120 91 27 113 107 100 289 510 A CHAPTER s amplitude by age in lead V2 Figure s amplitude by age in lead V2 each curve corresponding to the Indicated percentile level . mean s waves deflection in V2 decreases slightly after birth until age 1-3 months. From this age on the deflection increases but very little until adolescence. 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 95 Mean . 1 527 SD 0J5 0-41 5 0 1 109 12 8 95 100 120 90 97 110 107 100 289 210 43 CHAPTER s amplitude by age in lead V4 Age days Age months Age years Figure s amplitude by age In lead V4 each curve corresponding to the Indicated percentile level mean s waves in V4 are prominent after birth and become shallower and less prominent thereafter until age 13-18 years. 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 73-78 95 140 r5i . 146 11. Ì610 011. Mean SD 0-4 0737 0-47 5 Nr 109 12 8 95 100 120 42 07 113 107 100
