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本文采用多普勒超声、肺阻抗血流图、心电图及心音图同步描记并同时测量左心室和右心室的排血前期(PEP)。结果正常组左右心的PEP无显著差别,而可疑矽肺肺心病组及矽肺肺心病组左右心 PEP均有显著差别;另外,确诊矽肺肺心病组及可疑矽肺肺心病组右心PEP与正常组有显著差别,而左心PEP与正常组无明显差别。说明正常人左右心收缩时间间期基本上是同步的,而肺心病患者则不同步。这是由于矽肺肺心病患者右心功能受到明显影响,右室压力上升速率减慢,导致右室PEP延长。PEP这一指标在判别左右心功能方面甚为敏感,可望成为矽肺肺心病心脏功能评定的客观指标。
In this paper, Doppler ultrasound, pulmonary impedance blood flow diagram, ECG and phonocardiogram simultaneously tracing and simultaneous measurement of left ventricular and right ventricular ejection fraction (PEP). Results There was no significant difference in PEP between the left and right hearts in the normal group, but there was a significant difference in left and right heart PEP between the suspicious silicosis group and the silicosis group. In addition, PEP in the patients with suspected silicotic pulmonary heart disease group and suspicious silicosis group were higher than those in the normal group Significant difference, while left heart PEP and normal group no significant difference. Description of normal left and right heart contraction time interval is basically synchronous, and pulmonary heart disease patients are not synchronized. This is due to significantly impaired right ventricular function in patients with silicotic pulmonary heart disease, slowed rates of right ventricular pressure rise, resulting in prolonged right ventricular PEP. PEP this index in determining the left and right heart function is very sensitive, is expected to be an objective index of silicosis assessment of cardiac function.