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窦房结是心电冲动的初级发源地,正常的窦房结功能使心脏保持正常的窦性心律,并适应机体的生理要求接受神经体液调节其节律,以达最适泵血机能,保证重要器官的血液灌注。窦房结的电生理功能包括其起搏功能(窦房结细胞的自律性)和传导功能(窦房交界组织的传导性)。窦房结功能障碍在临床上称为病态窦房结综合征(Sick Sinus Syndrome SSS)。其心电图表现恒反映上述功能异常,诸如:(1)严重的窦性心率过缓:经常<50次/min,且不能适应
Sinus node is the primary source of ECG impulse, the normal sinus node function to maintain the normal sinus rhythm of the heart, and adapt to the physiological requirements of the body to accept neurohumoral regulation of its rhythm, in order to achieve optimal pump function, to ensure that important Blood perfusion of organs. The electrophysiological function of the sinoatrial node includes its pacing function (self-regulation of the sino-atrial cells) and conduction function (conduction of the sino-atrial junctional tissue). Sinus node dysfunction clinically known as sick sinus syndrome (Sick Sinus Syndrome SSS). The ECG performance of the constant reflection of these abnormalities, such as: (1) severe sinus bradycardia: often <50 beats / min, and can not adapt