期前收缩(下简称早搏)是一种较主导心律提前出现的主动性异位激动,是临床上最常见的心律失常之一。心脏的任何部位均可发出这种异常冲动:如窦房结、心房、房室结区(交接部)及心室。一、窦性早搏:在窦房结内的起搏点所产生的过早冲动引起的心脏除极。心电图显示一次与窦性激动下传的 P-QRS-T 形态相一致的波群,与前一次窦性 P 波保持一定间距,与下一次窦性 P 波之间保持相当于基本窦性 P—P 间 Premature rupture (hereinafter referred to as premature beats) is a more active predator than the dominant cardiac arrhythmia, is one of the most common clinical arrhythmias. This abnormal impulse can be issued in any part of the heart: such as the sinus node, atrium, atrioventricular node (junction) and ventricular. First, sinus premature beats: pacemaker in the sinus node caused by premature impulses of the heart depolarization. The electrocardiogram showed a group of constellations consistent with sinus-activated P-QRS-T morphology, maintaining a certain distance from the previous sinus P-wave and maintaining the same sinusoidal P- P between