心输出量(CO)是评价心脏功能的重要指标之一,1966年Kubicek提出了心阻抗图计算CO的经验公式,这种方法对人体无损伤,操作简便,但其理论根据尚不充实。因此,有关方法学的可靠性问题成为近十几年来心阻抗图研究的重点之一。许多学者把阻抗图和几种测定CO的经典方法进行对比,以验证其准确性,多数学者认为前者与后者有密切 Cardiac output (CO) is one of the important indexes to evaluate cardiac function. Kubicek proposed the empirical formula of CO calculation in heart impedance diagram in 1966. This method is harmless to the human body and easy to operate. However, its theoretical basis is not yet substantiated. Therefore, the reliability of the methodology has become one of the focuses of the research on heart impedance map in recent ten years. Many scholars compare the impedance diagram with several classical methods of measuring CO to verify their accuracy. Most scholars think the former is close to the latter