论文部分内容阅读
降压药物β阻滞剂和钙拮抗剂均有抗心律失常作用。这两类药物治疗室上性快速心律失常的效果基本相同,而治疗室性心律失常的效果则差别明显。本文着重讨论β阻滞对室性心律失常的疗效。交感神经介质对心肌动作电位的影响肾上腺素能介质的释放对室上性和室性心动过速的发作起重要作用。其最大效应表现为对窦房结和房室结电位的影响。肾上腺素能受体兴奋剂可使窦房结4相坡度增加,
Antihypertensive drugs beta blockers and calcium antagonists have anti-arrhythmic effects. These two types of drugs to treat supraventricular tachyarrhythmia effect is basically the same, and the treatment of ventricular arrhythmia effect is significantly different. This article focuses on the effect of β block on ventricular arrhythmias. Effect of sympathetic mediators on myocardial action potential Release of adrenergic mediators plays an important role in the onset of supraventricular and ventricular tachycardias. The maximum effect of the performance of the sinus node and atrioventricular node potential. Adrenergic receptor agonist can increase the sino-atrial node 4-phase gradient,