Noninasie stroke olume and cardiac output were measured using impedance cardiography and corrected for body surface area to yield both stroke and cardiac indexes 用阻抗心动描记法测量安静状态下的每搏输出量和心搏出量,而且用体表面积换算为心搏量和心脏指数。
Dysfunction of the autonomic nervous system can lead to a decrease in the cardiac output , cerebral anemia , suppression of brain function , and finally to a loss of consciousness 自主神经系统的功能失调能引起心搏出量的减少、脑贫血、大脑功能抑制,最后失去知觉。
Another point is that most of the gyms are not equipped to handle health emergencies , and even if it hardly happens , you should know that in case of sudden cardiac arrest the only thing the staff will be able to do is calling an ambulance 其它点是,大多gyms不被装备处理健康紧急状态,并且既使它几乎不发生,您应该知道在突然的心搏停止的情况下职员能做的唯一的事叫救护车。
Above influences are conformed by central nervous system and transmitted to sinoatrial node by sympathetic and parasympathetic nerves . in physiological conditions the parasympathetic nerve modulation to sinoatrial node play more important roles than sympathetic nerve and is the main source of the heart rate variability 在正常完整机体,心交感及心迷走均对窦房结施加紧张性影响,但在安静状态下心迷走紧张性影响居主导地位且是产生心率变异性(指逐次心搏rr间期不断波动的现象)的主要原因之一。