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生理状态下心脏的舒缩活动受窦房结的自律性控制 ,而窦房结的自律性活动受交感神经及迷走神经的支配。迷走神经对窦房结的调节作用反映在每一次窦性心动周期上 ,而交感神经的调节常常在 2 0s以后才起作用。心率 (HR)变异性 (HRV)是反映交感 迷走神经张力及其平衡的指标。本文通
Systolic and contractile activities of the heart under physiological conditions are controlled by the self-regulation of the sinus node, while the self-regulatory activity of the sino-atrial node is dominated by the sympathetic and vagal nerves. The regulation of the vagus nerve on the sinus node is reflected in each sinus rhythm, and the regulation of the sympathetic nerve usually works after 20 seconds. Heart rate (HR) variability (HRV) is an indicator of sympathetic vagal tone and its balance. This article pass