Hình Q biên độ theo độ tuổi dẫn tôi, mỗi đường cong tương ứng với mức phần trăm chỉ (• = trung bình). Q sóng trong dẫn tôi vắng mặt hoặc nhỏ trong giai đoạn trứng. | CHAPTER Q amplitude by age in lead I Age days Age months Age years Flgune Q amplitude by age in lead I each curve corresponding to the indicated percentile level mean . Q waves in lead I are absent or small during infancy. Months Years 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 Mean SD 012 .00n 014 00 00 5 0 A5 0 0 0 0 0 0 0 e 0 0 N 109 128 95 100 113 91 97 113 107 99 289 510 22 CHAPTER Q amplitude by age in lead II Age days Age months Age years Figure Q amplitude by age in lead II each curve corresponding to the Indicated percentile level mean . Q waves in lead II are generally small or absent. The amplitude is relatively larger during ages 1-3 months 3-6 months 6-12 months and 1-3 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 e Mean .e 1 . . SD - 0-08 00 -5 -05 5 0 0 0 0 0 0 0 0 0 0 0 0 Nr 109 12 8 95 100 113 91 07 113 107 99 039 510 23 CHAPTER Q amplitude by age in lead III Age days Age months Age years Q amplitude by age in lead III each curve corresponding to the indicated percentile level mean . Q waves in lead III are more prominent at ages 1-3 months 3-6 norths and 6-12 months with a deflection up to mm. re1 rer Days r 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 rer Mean .or 1 .o o SD 0-12 -1 0J4 087 0 8 1 81 5 0 0 0 0 0 0 0 0 0 0 0 0 9 6 109 12 8 95 100 113 91 mo mi 107 99 089 510 .
