??????
?????,P-R ??0.24s,??0.65%~1.1%,50 ??1.3%.
?,?????8.7%.???,?,?,,????,??,??P-R ?.
??P-R ????,??.?.
???????,????,????4%~15%,??.??,??????,?,.???,??????.????????,???.
?,?????8.7%.???,?,?,,????,??,??P-R ?.
??P-R ????,??.?.
???????,????,????4%~15%,??.??,??????,?,.???,??????.????????,???.
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1????P-R>0.20??P?QRS?.
2???????P?QRS??2:1;3:2;4:3????????????????
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(2)???????P-R???QRS???????1:1;2:1;3:1;3:2;4:3??QRS????
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2???????P?QRS??2:1;3:2;4:3????????????????
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(2)???????P-R???QRS???????1:1;2:1;3:1;3:2;4:3??QRS????
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?????????????????????????0.3mg23 /d ??100200mg23 /d ??P-R ?????P-R ???????-????????????????????????????????????????????????????????P-R ????H-V ?(60ms)???.
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