心肌的被动电学特性(passive electricalproperties)是指根据心肌的导电性能,或者把心肌作为一导电结构或元件来理解所应具有的特性。例如,心肌细胞膜内外均为导电的电解质溶液,可视为具有一定电阻的导体,细胞膜的脂质双分子层相当于介电物质,具有电容的特性。两导体中间由介电物质隔开,类似于同轴电缆的结构,故被动电学特性又称为电缆特性(cable properties)。心肌被动电学特性是心肌电生理特性的重要决定因素之一。近十年来,由于对这方面研究的深入,对某些心律失常发生的机理有了 Passive electrical properties of myocardium (passive electrical properties) refers to the electrical properties of the myocardium, or the heart as a conductive structure or element to understand the characteristics that should be. For example, the membrane inside and outside the myocardial cell membrane is a conductive electrolyte solution, which can be considered as a conductor with a certain resistance. The lipid bilayer of the cell membrane is equivalent to a dielectric substance and has the characteristic of capacitance. The two conductors are separated by a dielectric substance in the middle, which is similar to the structure of a coaxial cable. Therefore, passive electrical characteristics are also called cable properties. Passive electrical properties of myocardium is one of the important determinants of myocardial electrophysiological properties. In the past ten years, due to the in-depth research in this area, some arrhythmia mechanisms have occurred