單項選擇題心電圖中,正常QTc的最高值為()

A.0.12s
B.0.20s
C.0.32s
D.0.40s
E.0.44s


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2.單項選擇題一般正常的Q波時限應(yīng)()

A.<0.04s
B.<0.06s
C.<0.08s
D.<0.10s
E.<0.12s

4.單項選擇題正常成人的QRS波群時限多為()

A.0.04~0.08s
B.0.04~0.10s
C.0.06~0.10s
D.0.08~0.10s
E.0.08~0.12s

5.單項選擇題正常成人心率在正常范圍時,P-R間期為()

A.0.08~0.11s
B.0.08~0.20s
C.0.12~0.16s
D.0.12~0.20s
E.0.16~0.24s