论文部分内容阅读
交感神经释出的儿茶酚胺对心脏和血管有显著的生理作用。其增强心力的作用使每次心搏的肌张力上升速度与强度增加,从而使心脏的舒张末期压和收缩末期容量降低。心脏的自律性增加,表现为窦性心动过速以及出现异位房性与室性心律失常。心脏对氧和基质的消耗量增加,作为燃料的血液中脂质也增加。儿茶酚胺可使血管收缩与/或扩
Sympathetic release of catecholamines on the heart and blood vessels have a significant physiological role. Its effect of strengthening the heart makes each heartbeat muscle tension increase speed and intensity, so that the end-diastolic pressure and end systolic volume decreased. Increase in the self-discipline of the heart, manifested as sinus tachycardia and the emergence of heterotopic atrial and ventricular arrhythmias. The heart’s consumption of oxygen and matrices is increased, and lipids in the blood as fuel also increase. Catecholamines cause vasoconstriction and / or expansion