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用体表电位标测微机系统(Ⅰ型)检测了66例陈旧性心肌梗塞患者的体表等电位图。发现心肌梗塞QRS的体表等电位图变化主要在心室兴奋的早、中期,相当于心电图上的Q波期;前间壁、广泛前壁和局限性前壁心肌梗塞时,前胸部反映出电兴奋丧失,呈负区;一般坏死范围越大,负区范围也越广,负压值越大。前壁梗塞时,电位图变化主要在心室兴奋的前42ms,晚期图形基本不变;下壁梗塞的,在心室兴奋的早期(18ms)以前,负压在前胸及背部下区,中期多反映在前胸。因此,根据不同梗塞部位及左室不同兴奋时间的体表等电位变化特征,可以诊断出常规胸导心电图正常的心肌梗塞患者。
Body surface potential mapping computer system (type Ⅰ) 66 cases of patients with old myocardial infarction measured body surface potential map. Found that myocardial infarction QRS changes in body surface potential is mainly in the ventricular excited early, mid-term, equivalent to the Q wave on the ECG; anterior wall, extensive anterior wall and local anterior myocardial infarction, the anterior chest reflects electrical excitement Loss, was negative; general necrosis of the larger the scope of the negative area is also wider, the greater the negative pressure value. Changes in the anterior wall infarction, the potential changes in the main ventricular excited 42ms, the late graph basically unchanged; inferior wall infarction, ventricular excitement in the early (18ms) before the negative pressure in the chest and dorsal lower, mid-term more reflect In the chest. Therefore, according to different infarction sites and left ventricular different excitement time of the body surface potential changes, can be diagnosed with conventional chest ECG in patients with normal myocardial infarction.