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检查心功能的方法有创伤性(心导管、造形法)和无创性(包括收缩时间间期、血流阻抗法、同位素、超声心动图等)。超声心动图(UCG)测定左室功能是七十年代发展起来的一门新技术。最早研究是美国的Feigenbaum(1967年),近年已广泛应用于生理研究及临床。现介绍M型的应用。一、测定心输出量的原理和方法:超声心动图可看见心内结构的活动。根据心内结构活动及心腔内径变化可了解心脏功能。UCG测定的左室功能指标多数是基于心室内径测定而推算出来的,根据UCG
Methods for examining cardiac function include traumatic (cardiac catheterization, shape) and noninvasive (including systolic time, flow impedance, isotope, echocardiography, etc.). Echocardiography (UCG) Determination of left ventricular function was developed in the seventies a new technology. The earliest study is the United States Feigenbaum (1967), in recent years has been widely used in physiological research and clinical. Now introduce the M-type applications. First, the determination of the principle and method of cardiac output: Echocardiography can see the structure of the heart activity. Cardiac function can be understood based on changes in intracardiac activity and intracardiac diameter. Most of the left ventricular function indicators measured by UCG are based on the determination of the ventricular diameter. According to UCG