房性期前收缩诱发的阵发性心房颤动发作初始的电生理特征  

Electrophysiologic characteristics in initiation of paroxysmal atrial fibrillation triggered by premature atrial contraction

作　　者：徐晓[1] 郑林林[1] 韩卫星[1] 

机构地区：[1]安徽医科大学第一附属医院心电心功能科,合肥230022

出　　处：《临床心血管病杂志》2013年第8期635-636,共2页Journal of Clinical Cardiology

摘　　要：心房颤动（Af）是最常见的心律失常之一，其始动或触发机制在其发生和维持中起重要作用。本文通过12通道动态心电图观察阵发性Af发作初始心电变化，探究阵发性Af的发生机制，以期为治疗提供帮助。 1 对象与方法 1.1对象 2010-09-2012-03于我院动态心电图检查（康泰TLC4000豪华型12导联动态心电图仪）诊断为阵发性Af的门诊及住院患者47例，男29例，女18例，年龄46～91岁，平均（72.6±10.1）岁。人选患者无严重心功能不全（NYHAUI、IV级）、不稳定型心绞痛或心肌梗死，未并发房室传导阻滞及甲状腺功能亢进，未应用抗心律失常药物。Fourty-seven patients with paroxysmal atrial fthrillation （PAD were included in the study to analyze the electrophysiologic characteristics of premature atrial contraction （PAC） which triggered PAl. The coupling interval of PAC, the circle length before PAC, the frequency of PAC in 120 seconds and parameters of heart rate variability （HRV） before the PAC were measured and calculated. A total of 297 episodes of PAf were triggered by APC, 206 （69.4%） were from upper left atrial. APC that triggered PAf had shorter coupling interval, longer circle length before PAC, and increased PAC in 120 seconds before PAl. SDNN and HF increased significantly and LF/HF deereased remarkably before PAf.

关 键 词：心房颤动 阵发性 期前收缩 房性 心率变异性 

分 类 号：R541.7[医药卫生—心血管疾病]