??????????1.8s?????????
??k????1.2s????

?????
2 ?40???????2??79/?P-R0.14sQRS?0.09s2P-QRS-T???35791113P-QRS-T??????????????T???2 ? ??????????????PP????PP??????????????????????????????????32??Schamroth???P-P??P-P????????P-P??32???1?IIP1 P3P4 P7V5P2 P5P6 P7P-P???2??????P-P?32??S-S?0.50sP-P?0.72s?S-P??0.22s???????

????(???????
?
L???????????????????????????????????????????? ????????????? ???????????????????????????60100????????????? ??????????????????????????????????????????????????? ????????????????????????????? ????????????? ???????? ? ???????????? 1)???????????????????????????????????????????
(2)??? ??????...

???,:1? 2? 3? 4? ??,?? ?????.
???

??
???
?
?????????????????????????0.12S??????????????
???


?
1PavfIII????AVR??????????????
2PQRS??0.12S.(P??QRS ???????????????0.12S)
??????100~60??100~150???60~40?
????75??0.8S??????0.12S????

??????
??????
z????????
w

?
????
???
?????
?????
???