No significant differences were found in the heart rate, QRS intervals, Q T intervals, sinus bradycardia, sinus tachycardia and left axis deviation between exposed and control groups ( P >0 05).
其余心率、QRS间期、Q-T间期的数值以及窦性心动过缓、窦性心动过速和心电轴左偏等发生率，两组之间均无差异（P＞0．05）。
Their heart rates slowed down, P R and Q T intervals prolonged and blood pressure reduced after exposure, as compared with those before exposure.
工人接触后心电图指标与接触前自身比较，出现心率减慢、PR间期和QT间期延长及血压下降。
Their heart rates slowed down, P R and Q T intervals prolonged and blood pressure reduced after exposure, as compared with those before exposure.
工人接触后心电图指标与接触前自身比较，出现心率减慢、PR间期和QT间期延长及血压下降。
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