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测定心脏病患者的心脏收缩功能 ,对于指导临床分型和治疗、评价药物疗效、判断预后具有重要的临床意义[1] 。左心室射血分数是反映心脏收缩功能最好的指标。Ｘ线左心室造影 (左心室造影 )是临床测定左心室收缩功能最准确的方法[2 ] 。心阻抗微分图是一种简单的无创性测定心脏病
Determination of cardiac systolic function in patients with heart disease, for the clinical classification and treatment, evaluation of drug efficacy, prognosis has important clinical significance [1]. Left ventricular ejection fraction is the best indicator of systolic function. X-ray left ventricular angiography (left ventricular angiography) is the most accurate method of clinical determination of left ventricular systolic function [2]. Cardiac impedance differential graph is a simple non-invasive method for the determination of heart disease