顾名思义，预激即预先激动。凡有预激现象都称为预激综合征，这是一种较为少见的 心律失常。该病发生的原因在于心房与心室之间传导异常，冲动经过异常的附加通道（也称 “旁道”）下传，预先兴奋心脏的一部分，引起部分心室肌提前收缩。这些附加通道大多为 先天性的，只有少数 As the name suggests, pre-excitation that is pre-excited. Where there are pre-excitation phenomenon are called WPW syndrome, which is a relatively rare arrhythmia. The disease occurs because of anomalous conduction between the atria and the ventricle. Impulses pass through abnormal additional channels (also referred to as “bypass channels”) to pre-excite a part of the heart and cause premature contraction of part of the ventricular muscles. Most of these additional channels are congenital, only a few