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典型的LBBB心电图颇为常见。然而在原有束支阻滞基础上合并有4相室内传导阻滞的仅有少数文献报道,现报告1例。患者男性,52岁,高血压病史7年。因心悸、气短于1986年5月5日就诊。体检:BP160/90,心界向左扩大,心律不齐,A_2>P_2,心尖二级收缩期杂音,UCG提示冠心病。附图(见第36页)为Ⅰ导联不连续描记。基本心律为窦性,伴有LBBB,P波形态一致,P-R间期固定为0.16秒,频发室性早搏,联律间期不等。值得注意的是,同是LBBB,却呈现3种形态的QRS波:当心率快时(R-R<91)QRS振幅较低,时限为
A typical LBBB electrocardiogram is quite common. However, in the original bundle branch block combined with 4-phase intraventricular conduction block only reported in a few reports, 1 cases were reported. Male patient, 52 years old, history of hypertension 7 years. Due to heart palpitations, shortness of breath in May 5, 1986 treatment. Physical examination: BP160 / 90, heart left to expand, arrhythmia, A_2> P_2, apical systolic murmur, UCG prompted coronary heart disease. The drawing (see page 36) is a lead I discontinuity trace. The basic rhythm of sinus, accompanied by LBBB, P wave morphology, P-R interval was 0.16 seconds, frequent premature ventricular contractions, between the law interval. It is noteworthy that the same LBBB, but showed three forms of QRS wave: when the heart rate is fast (R-R <91) QRS amplitude is low, the time limit is