Strophanthus Gratus seeds extract powder,Strophanthus, kombe-strophanthin,strophantin-K,Strophantin K (Mixture),combetin,STROPHANTHIN K,Strofan-K powder
The functions of the Strophanthus Gratus seeds extract powder
1. Positive myodynamic effect: It can excite myocardial contractile protein and increase myocardial contractile force.
2. Negative frequency effect: Because of its positive muscle force, the hemodynamic state is improved, the tension of reflex sympathetic nerve is eliminated, and the tension of vagus nerve is enhanced, thus slowing down the heart rate and delaying atrioventricular conduction.
3. Cardiac electrophysiological effects: reducing sinoatrial node autonomy; improving Purkinje's fibre autonomy; slowing down atrioventricular node conduction velocity and prolonging its effective refractory period, leading to increased occult conduction of atrioventricular node and slowing down the ventricular rate of atrial fibrillation or flutter; because this medicine shortens the effective refractory period of atrium, it may lead to increased atrial rate when used in atrial tachycardia and flutter. Velocity and atrial flutter turned to atrial fibrillation and shortened the effective refractory period of Purkinje's fibers.
4. Extracardiac effects of cardiac glycoside: cardiac glycoside affects the function of optic nerve, even causes retrobulbar optic neuritis and optic nerve disorders, such as blurred vision, diplopia and color vision (yellow or green vision). The excitation of cardiac glycoside on central sympathetic nerve caused by toxic dose of cardiac glycoside leads to high sympathetic nerve tension, which is the nerve factor of cardiac arrhythmia induced by cardiac glycoside. Cardiac glycoside has direct contraction effect on human arteries and veins, which is the direct effect of cardiac glycoside on blood vessels.
