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）。
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).
但是即便那样，也可能还要做一个超声心动图失同步研究，这对窄QRS间期的患者更为重要。
But even then, he said, he'd probably want to do an echo dyssynchrony study. The evaluation would be even more important in patients with narrower QRS intervals.
顺向型房室折返性心动过速时，出现两种不同的R-P-间期和P-波或房性融合波。
There were two kinds of R-P-period and P-wave or atrial fusion wave in anterior AVRT.
结论：最佳房室间期起搏有利于患者的心功能，超声心动图是指导房室间期设置的简便而可靠手段。
Conclusions: the optimal AVD benefit the function of the heart in patients with dual chamber pacemakers, and echocardiography is a simple and valid tool for evaluating the optimal AVD.
应用经食管超声心动图测量肺静脉血流频谱曲线收缩早期逆向R波峰值流速（PVR）和收缩期S波峰值流速（PVS） ，分析PVR和PVS与其前心电图R R间期的关系。
The peak velocities of the early systolic reversal wave (PVR) and the systolic forward wave (PVS) were measured. The relationships between the preceding R-R intervals and PVR, PVS were analyzed.
窦性心动过缓、ST-T改变、心肌缺血最常见，其他异常主要有早搏、心律不齐、传导阻滞、异常Q波、Q-T 间期延长等改变。
The ECG abnormalities were commonly sinus bradycardia, ST-T changes, and myocardial ischemia while others mainly included premature beat, arrhythmia, conduction block, abnormal Q waves, and so on.
窦性心动过缓、ST-T改变、心肌缺血最常见，其他异常主要有早搏、心律不齐、传导阻滞、异常Q波、Q-T 间期延长等改变。
The ECG abnormalities were commonly sinus bradycardia, ST-T changes, and myocardial ischemia while others mainly included premature beat, arrhythmia, conduction block, abnormal Q waves, and so on.
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