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心脏的泵功能受到损害时,心脏的搏出量减少,静脉系统瘀血,动脉系统血流灌注不足,出现一系列临床症候群。这就是所说的“心脏功能不全”或“心力衰竭”。正常情况下,心脏搏出量主要受心肌收缩力、前负荷、后负荷、心率及心室收缩的协调性等五个因素影响。心力衰竭的早期,心脏的代偿功能也是通过改变这五个因素来实现。〔病因〕心力衰竭是小儿时期常见的急症之一,其病因与成人不尽相同,但多发生在原有器质性心脏病的基础上。
When the pump function of the heart is impaired, the stroke volume of the heart decreases, the blood stasis of the venous system and the inadequate perfusion of the arterial system occur, and a series of clinical syndromes occur. This is what we call “heart failure” or “heart failure.” Under normal circumstances, cardiac stroke volume is mainly affected by myocardial contractility, preload, afterload, heart rate and ventricular systolic coordination of five factors. Early heart failure, heart compensatory function is also achieved by changing these five factors. [Cause] Heart failure is one of the common emergency in infancy, its causes and adults are not the same, but occurred in the original organic heart disease on the basis of.