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1、本文观察了四组310份心电图PTF—V_1异常出现的情况。结果是肺心病组与其它三组比较具有较高的特异性。提示在除外其它心脏病的情况下,结合病人慢气、肺气肿病史,若心电图上出现PTF—V_1异常,应考虑肺心病的可能。 2、对肺心病组主要条件和PTF—V_1异常出现的情况进行观察。结果PTF—V_1异常出现的频数可占土要条件的第二位。说明PTF—V_1异常作为肺心病心电图诊断标准的一项指标,具有较高的敏感性。 3、肺心病PTF—V_1异常与病人的性别、年令和心功能无关。 4、探讨了肺心病PTF—V_1异常的产生机理,认为与肺气肿伴膈肌下降引起心脏转位,从而使P向量在横面V_1导联轴上的投影大部落于负侧有关。还可能与缺氧,高碳酸血症、支气管肺血管分流形成和冠状动脉供血不足等因素引起的左心机能不全有关。 5、本文认为肺心病PTF—V_1异常的值应以负值≤-0.02毫米·秒为宜。
1, the paper observed the four groups of 310 electrocardiogram abnormal PTF-V_1 situation. The result is the pulmonary heart disease group compared with the other three groups with high specificity. Prompt except in the case of other heart disease, combined with the patient’s chronic gas, emphysema history, if the ECG appears abnormal PTF-V_1, pulmonary heart disease should be considered. 2, the main conditions of pulmonary heart disease and PTF-V_1 abnormalities were observed. Results The frequency of PTF-V_1 anomalies may account for the second place of soil conditions. PTF-V_1 anomalies as an ECG diagnostic criteria for pulmonary heart disease indicators, with high sensitivity. 3, pulmonary heart disease PTF-V_1 abnormalities and the patient’s gender, year and heart function has nothing to do. The mechanism of abnormal PTF-V_1 in pulmonary heart disease was discussed. It is believed that the emphysema and diaphragmatic muscle descend to cause cardiac translocation, so that the projection of P vector on the axis of V_1 lead is mostly on the negative side. May also be hypoxia, hypercapnia, bronchial and pulmonary vascular shunt and coronary insufficiency and other factors caused by left ventricular dysfunction. 5, this paper considers the value of pulmonary heart disease PTF-V_1 anomalies should be negative ≤ -0.02 mm · s is appropriate.