This normal variation in rhythm is known as sinus arrhythmia.
节律的这种正常变化称为窦性心律失常。
This sinus arrhythmia is a normal phenomenon and is due to primarily to fluctuations in parasympathetic output to the heart.
这种窦性心律失常是一种正常现象，主要是由于副交感神经输出到心脏的波动。
The prominent abnormalities in ECG were tachycardia (31.7%) and sinus arrhythmia (26.8%), while in UCG were pericardial effusions.
心电图异常主要表现为窦性心动过速（31.7% ）、窦性心律不齐（26。 8% ）。
Results The total ECG abnormal rate, sinus bradycardia and sinus arrhythmia in the exposed group were significantly higher than those of the control group(P<0.01, or P<0.05).
结果接触组ECG总异常率、窦性心动过缓和窦性心律不齐的检出率均显著高于对照组（P<0.01或P<0.05），高剂量组ECG总异常率较低剂量组增高（P<0.01）。
It suggested that computer operators exposed to microwave of lower intensity in the radio calling signal station might lead to sinus arrhythmia, due to the disorder of vegetative nerve system.
结果提示：无线寻呼台电脑操作人员长期接触低强度微波，可导致机体植物神经功能紊乱，从而出现窦性心率不齐的改变。
Results suggest that the level of the myocardial contractility with ectopic arrhythmia was lower than that of the sinus rhythm.
结果表明：中枢性心律失常时，各种异位心律产生的心肌收缩力均较窦性心律下降。
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。
Background: Sick sinus syndrome (SSS) is a common clinical arrhythmia, the only way to solve it is cardiac pacing.
背景：病窦综合征(SSS)是临床上常见的缓慢性心律失常，心脏起搏治疗是唯一有效措施。
During proecedure main cardiac arrhythmia found its expression in node tachycardia beat(81.8% ), ventricular premature contraction (45.5% ) and after procedure in sinus rate variation.
术中主要的心律失常是交接区心动过速（81.8％）及室上性期前收缩（45.5％），而术后主要是窦性心率增快。
During proecedure main cardiac arrhythmia found its expression in node tachycardia beat(81.8% ), ventricular premature contraction (45.5% ) and after procedure in sinus rate variation.
术中主要的心律失常是交接区心动过速（81.8％）及室上性期前收缩（45.5％），而术后主要是窦性心率增快。
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