心房分离是罕见的房性心律失常,现报告一例如下。患者男性,58岁,风湿性心脏病,二尖瓣狭窄及关闭不全,心力衰竭。心电图片共4帧,Ⅱa、Ⅱb、Ⅱc、Ⅱd 为连续描记的Ⅱ导联。基本节律为位于窦房结及房室连接处间的游走节奏点,频率约95次/分,窦性 P 波直立,房室连接处 P 波倒置(Ⅱb),其后均有下传的QRS 波。异位心房节律37次/分,规则,P 波直立,较窦性 P 波稍低,其后无下传的 QRS Atrial septation is a rare atrial arrhythmia, is now reported as an example below. Patient male, 58 years old, rheumatic heart disease, mitral stenosis and insufficiency, heart failure. A total of 4 ECG pictures, Ⅱ a, Ⅱ b, Ⅱ c, Ⅱ d continuous tracing Ⅱ lead. The basic rhythm is the walking rhythm point located at the junction of the sinoatrial node and atrioventricular node at a frequency of about 95 beats / min. The sinus P wave is upright and the P wave is inverted at the atrioventricular junction (IIb) QRS wave. Ectopic atrial rhythm of 37 beats / min, regular, P wave upright, slightly lower than the sinus P wave, then no QRS