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患者女性,71岁。临床拟诊冠心病、心律失常。附图是Ⅱ导联连续记录。本图基本心律为窦性,窦P形态、时限和电压均正常,P-R为0.13s,窦性周期0.84—0.92s.约合心率68次/min,ST段轻度水平型压低。本图上行P_(4、7)和下行P_(2、5)提前发生、为房早,联律间期固定为0.42s,形态与窦P稍异,为非逆传型,但P′-R汉有0.10s,这可能因为窦-房交界区或房内发生折返时,激动优先进入房室交界区-心室,从而导致房早的P′-R较短。房早代偿间歇后的窦性P波形态多变(但P-R不变,仍为窦性周期的P-R约0.13s)——上行P_5低小切迹,
Patient female, 71 years old. Clinical diagnosis of coronary heart disease, arrhythmia. The figure is II lead continuous record. The basic rhythm of the figure is sinus, sinus P morphology, time and voltage were normal, P-R was 0.13s, sinus cycle 0.84-0.92s. About coincidence rate of 68 beats / min, ST-segment mild horizontal depression. The upstream P_ (4,7) and the downstream P_ (2,5) in this figure occurred in advance, and was premature. The intercourse interval was fixed at 0.42s. The morphology was slightly different from the sinus P, R Han has 0.10s, which may be because the sinus - atrial junction or room reentry, the excited preferential access to the AV junction - the ventricle, resulting in early morning P’-R short. Atrial compensatory intermittent sinusoidal P wave morphological changes (but P-R unchanged, still the sinus cycle of P-R about 0.13s) - uplink P_5 low small notch,