房性早搏诱发阵发性心房颤动的动态心电图分析

An analysis of 24 hour dynamic electrocardiogram on paroxysmal atrial fibrillation triggered by premature atrial contraction.

目的探讨房性早搏(简称房早)与阵发性心房颤动(简称房颤)的关系。方法选择经动态心电图诊断为阵发性心房颤动的患者64例。统计其24 h房性早搏总数,房颤发作的阵数,诱发和未诱发房颤的房性早搏的联律间期及房早前周期等。结果经动态心电图记录阵发性心房颤动患者诱发房颤的房早均呈频发房性早PonT现象;诱发房颤的房早联律间期(346.7±38.5 ms)比未诱发房颤的房早联律间期(412.3±40.2 ms)明显提前(P<0.01);诱发房颤的房早前周期(836±115 ms)比未诱发房颤的房早前周期(733±118 ms)明显延长(P<0.01)。结论阵发性心房颤动由房性早搏始动与房性早搏的联律间期及房早前周期有关。动态心电图是诊断阵发性心房颤动可靠、高效、无创、重复性好的检查手段。

Objective To investigate the relationship between premature atrial contraction （PAC）and paroxysmal atrial fibrillation （PAF）. nethodsSixty four patients with PAC were analyzed with 24 hour dynamic electrocardiogram. The total numbers of PAC and bursts of PAF, coupling interval of PAC and cycle length before PAC which could or could not induce PAF were accounted. Results The premature induced AF were P on T. The coupling interval of PAC（346.7±38.5 ms） which induced PAF was shorter than that （412.3±40.2 ms）which did not induce PAF （ P 〈 0.01 ）. The cycle length before PAC （836± 115 ms）which induced PAF was longer than that（733 ± 118 ms） which could not induce （ P 〈0.01 ）. Conclusion PAF is not only mostly triggered by PAC, but also in relation with the coupling interval and the cycle length before PAC. Dynamic electrocardiogram is a reliable and reproducible examination in the diagnosis of paroxysmal atrial fibrillation.