论文部分内容阅读
洋地黄为治疗充血性心力衰竭及各种心律失常不可缺少的药物。由于洋地黄的治疗剂量及中毒剂量的差别比较小,且病人对洋地黄的需要量及耐受性的差异又很大,因此在应用洋地黄制剂时必须充分了解洋地黄的药理、适应症、给药原则和方法、洋地黄中毒的表现及治疗等,以期达到治疗目的。洋地黄的药理作用一切强心性配糖体其作用皆相同,不同的是作用强弱、快慢和持续时间的长短,即量的区别。对心肌的作用 (1)加强心肌收缩力即所谓正性肌力作用。此系对心肌直接作用,并非通过神经机制。仅发生于心肌已经产生一定代谢变化的基础上,能提高心肌的机械效能。(2)减慢心率即所谓负性频率作用。主要原因是机械的,是
Digitalis for the treatment of congestive heart failure and various arrhythmias indispensable drugs. Because digitalis treatment dose and poison dose is relatively small, and the patient’s need for digitalis and tolerability differences are very large, so the application of digitalis preparations must fully understand digitalis pharmacology, indications, Drug delivery principles and methods, digitalis poisoning performance and treatment, in order to achieve the purpose of treatment. The pharmacological effects of digitalis All cardiac glycosides with their role is the same, the difference is the role of strength, speed and duration of the length, that is, the difference between the amount. The role of the heart (1) to strengthen myocardial contractility that the so-called positive inotropic effect. This is a direct effect on the myocardium, not through the neural mechanism. Occurs only in the myocardium has produced a certain metabolic changes based on the heart can improve the mechanical performance. (2) Slow heart rate is the so-called negative frequency effect. The main reason is mechanical, yes